DEPTH(FEET) = 0.20 FLOW VELOCITY(FEET/SEC.) = 4.31
LONGEST FLOWPATH FROM NODE 250.00 TO NODE 245.00 = 2253.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 245.00 TO NODE 245.00 IS CODE = 11 ---------------------------------------------------------------------------- >>>>>CONFLUENCE MEMORY BANK # 1 WITH THE MAIN-STREAM MEMORY<<<<< ============================================================================ ** MAIN STREAM CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 87.20 15.28 2.563 0.23( 0.23) 1.00 41.6 250.00
LONGEST FLOWPATH FROM NODE 250.00 TO NODE 245.00 = 2253.00 FEET. ** MEMORY BANK # 1 CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 140.28 20.83 2.151 0.25( 0.25) 1.00 68.9 235.00
2 140.79 30.35 1.738 0.25( 0.25) 1.00 92.7 215.00
3 141.11 32.42 1.674 0.25( 0.25) 1.00 98.1 200.00
4 140.87 32.51 1.672 0.25( 0.25) 1.00 98.1 210.00
LONGEST FLOWPATH FROM NODE 200.00 TO NODE 245.00 = 4958.00 FEET. ** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 212.41 15.28 2.563 0.24( 0.24) 1.00 92.1 250.00
2 212.06 20.83 2.151 0.24( 0.24) 1.00 110.5 235.00
3 197.12 30.35 1.738 0.24( 0.24) 1.00 134.3 215.00
4 195.07 32.42 1.674 0.24( 0.24) 1.00 139.7 200.00
5 194.73 32.51 1.672 0.24( 0.24) 1.00 139.7 210.00
TOTAL AREA(ACRES) = 139.7
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 212.41 Tc(MIN.) = 15.280
EFFECTIVE AREA(ACRES) = 92.11 AREA-AVERAGED Fm(INCH/HR) = 0.24 AREA-AVERAGED Fp(INCH/HR) = 0.24 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 139.7
LONGEST FLOWPATH FROM NODE 200.00 TO NODE 245.00 = 4958.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 245.00 TO NODE 245.00 IS CODE = 12 ---------------------------------------------------------------------------- >>>>>CLEAR MEMORY BANK # 1 <<<<<
============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 245.00 TO NODE 260.00 IS CODE = 56 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 423.93 DOWNSTREAM(FEET) = 400.00 CHANNEL LENGTH THRU SUBAREA(FEET) = 709.00 CHANNEL SLOPE = 0.0338 GIVEN CHANNEL BASE(FEET) = 100.00 CHANNEL FREEBOARD(FEET) = 0.0 "Z" FACTOR = 2.500 MANNING'S FACTOR = 0.030
*ESTIMATED CHANNEL HEIGHT(FEET) = 0.42
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 2.366
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" D 1.52 0.20 1.000 93
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.20
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 213.89 TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 5.08 AVERAGE FLOW DEPTH(FEET) = 0.42 TRAVEL TIME(MIN.) = 2.33 Tc(MIN.) = 17.61
SUBAREA AREA(ACRES) = 1.52 SUBAREA RUNOFF(CFS) = 2.96
EFFECTIVE AREA(ACRES) = 93.63 AREA-AVERAGED Fm(INCH/HR) = 0.24 AREA-AVERAGED Fp(INCH/HR) = 0.24 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 141.2 PEAK FLOW RATE(CFS) = 212.41
NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE
GIVEN CHANNEL BASE(FEET) = 100.00 CHANNEL FREEBOARD(FEET) = 0.0 "Z" FACTOR = 2.500 MANNING'S FACTOR = 0.030
*ESTIMATED CHANNEL HEIGHT(FEET) = 0.42
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 0.42 FLOW VELOCITY(FEET/SEC.) = 5.04
LONGEST FLOWPATH FROM NODE 200.00 TO NODE 260.00 = 5667.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 260.00 TO NODE 260.00 IS CODE = 10 ---------------------------------------------------------------------------- >>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 3 <<<<< ============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 265.00 TO NODE 267.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< ============================================================================ INITIAL SUBAREA FLOW-LENGTH(FEET) = 283.00
ELEVATION DATA: UPSTREAM(FEET) = 492.93 DOWNSTREAM(FEET) = 475.00 Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 8.720
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.521
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
NATURAL POOR COVER
"BARREN" D 1.00 0.20 1.000 93 8.72
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.20
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
SUBAREA RUNOFF(CFS) = 2.99
TOTAL AREA(ACRES) = 1.00 PEAK FLOW RATE(CFS) = 2.99
**************************************************************************** FLOW PROCESS FROM NODE 267.00 TO NODE 270.00 IS CODE = 56 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 475.00 DOWNSTREAM(FEET) = 406.00 CHANNEL LENGTH THRU SUBAREA(FEET) = 577.00 CHANNEL SLOPE = 0.1196 GIVEN CHANNEL BASE(FEET) = 10.00 CHANNEL FREEBOARD(FEET) = 0.0 "Z" FACTOR = 2.500 MANNING'S FACTOR = 0.030
*ESTIMATED CHANNEL HEIGHT(FEET) = 0.24
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.205
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" A 0.35 0.40 1.000 78
NATURAL POOR COVER
"BARREN" B 0.21 0.30 1.000 86
NATURAL POOR COVER
"BARREN" C 0.55 0.25 1.000 91
NATURAL POOR COVER
"BARREN" D 7.47 0.20 1.000 93
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.21
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 14.56
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 6.10 AVERAGE FLOW DEPTH(FEET) = 0.23 TRAVEL TIME(MIN.) = 1.58 Tc(MIN.) = 10.30
SUBAREA AREA(ACRES) = 8.58 SUBAREA RUNOFF(CFS) = 23.10
EFFECTIVE AREA(ACRES) = 9.58 AREA-AVERAGED Fm(INCH/HR) = 0.21 AREA-AVERAGED Fp(INCH/HR) = 0.21 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 9.6 PEAK FLOW RATE(CFS) = 25.80
GIVEN CHANNEL BASE(FEET) = 10.00 CHANNEL FREEBOARD(FEET) = 0.0 "Z" FACTOR = 2.500 MANNING'S FACTOR = 0.030
*ESTIMATED CHANNEL HEIGHT(FEET) = 0.32
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 0.32 FLOW VELOCITY(FEET/SEC.) = 7.53
LONGEST FLOWPATH FROM NODE 265.00 TO NODE 270.00 = 860.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 270.00 TO NODE 270.00 IS CODE = 10 ---------------------------------------------------------------------------- >>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 2 <<<<< ============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 300.00 TO NODE 302.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< ============================================================================ INITIAL SUBAREA FLOW-LENGTH(FEET) = 311.00
ELEVATION DATA: UPSTREAM(FEET) = 645.43 DOWNSTREAM(FEET) = 625.00 Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 8.990
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.461
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
NATURAL POOR COVER
"BARREN" C 1.55 0.25 1.000 91 8.99
NATURAL POOR COVER
"BARREN" D 0.17 0.20 1.000 93 8.99
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
SUBAREA RUNOFF(CFS) = 4.98
TOTAL AREA(ACRES) = 1.72 PEAK FLOW RATE(CFS) = 4.98
**************************************************************************** FLOW PROCESS FROM NODE 302.00 TO NODE 305.00 IS CODE = 56 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 625.00 DOWNSTREAM(FEET) = 508.97 CHANNEL LENGTH THRU SUBAREA(FEET) = 858.00 CHANNEL SLOPE = 0.1352 GIVEN CHANNEL BASE(FEET) = 70.00 CHANNEL FREEBOARD(FEET) = 0.0 "Z" FACTOR = 2.500 MANNING'S FACTOR = 0.030
*ESTIMATED CHANNEL HEIGHT(FEET) = 0.07
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 2.703
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" C 6.84 0.25 1.000 91
NATURAL POOR COVER
"BARREN" D 0.36 0.20 1.000 93
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 13.03
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 2.91 AVERAGE FLOW DEPTH(FEET) = 0.06 TRAVEL TIME(MIN.) = 4.92 Tc(MIN.) = 13.91
SUBAREA AREA(ACRES) = 7.20 SUBAREA RUNOFF(CFS) = 15.91
EFFECTIVE AREA(ACRES) = 8.92 AREA-AVERAGED Fm(INCH/HR) = 0.25 AREA-AVERAGED Fp(INCH/HR) = 0.25 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 8.9 PEAK FLOW RATE(CFS) = 19.72
GIVEN CHANNEL BASE(FEET) = 70.00 CHANNEL FREEBOARD(FEET) = 0.0 "Z" FACTOR = 2.500 MANNING'S FACTOR = 0.030
*ESTIMATED CHANNEL HEIGHT(FEET) = 0.08
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 0.08 FLOW VELOCITY(FEET/SEC.) = 3.46
LONGEST FLOWPATH FROM NODE 300.00 TO NODE 305.00 = 1169.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 305.00 TO NODE 320.00 IS CODE = 56 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 508.97 DOWNSTREAM(FEET) = 449.09 CHANNEL LENGTH THRU SUBAREA(FEET) = 685.00 CHANNEL SLOPE = 0.0874 GIVEN CHANNEL BASE(FEET) = 70.00 CHANNEL FREEBOARD(FEET) = 0.0 "Z" FACTOR = 2.500 MANNING'S FACTOR = 0.030
*ESTIMATED CHANNEL HEIGHT(FEET) = 0.11
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 2.390
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" C 3.57 0.25 1.000 91
NATURAL POOR COVER
"BARREN" D 3.33 0.20 1.000 93
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.23
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 26.46
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 3.37 AVERAGE FLOW DEPTH(FEET) = 0.11 TRAVEL TIME(MIN.) = 3.38 Tc(MIN.) = 17.29
SUBAREA AREA(ACRES) = 6.90 SUBAREA RUNOFF(CFS) = 13.44
EFFECTIVE AREA(ACRES) = 15.82 AREA-AVERAGED Fm(INCH/HR) = 0.24 AREA-AVERAGED Fp(INCH/HR) = 0.24 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 15.8 PEAK FLOW RATE(CFS) = 30.64
GIVEN CHANNEL BASE(FEET) = 70.00 CHANNEL FREEBOARD(FEET) = 0.0 "Z" FACTOR = 2.500 MANNING'S FACTOR = 0.030
*ESTIMATED CHANNEL HEIGHT(FEET) = 0.12
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 0.12 FLOW VELOCITY(FEET/SEC.) = 3.66
LONGEST FLOWPATH FROM NODE 300.00 TO NODE 320.00 = 1854.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 320.00 TO NODE 320.00 IS CODE = 10 ---------------------------------------------------------------------------- >>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 1 <<<<< ============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 310.00 TO NODE 312.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< ============================================================================ INITIAL SUBAREA FLOW-LENGTH(FEET) = 310.00
ELEVATION DATA: UPSTREAM(FEET) = 626.57 DOWNSTREAM(FEET) = 585.00 Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 7.784
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.755
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
NATURAL POOR COVER
"BARREN" D 5.08 0.20 1.000 93 7.78
NATURAL POOR COVER
"BARREN" A 0.57 0.40 1.000 78 7.78
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.22
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
SUBAREA RUNOFF(CFS) = 17.97
TOTAL AREA(ACRES) = 5.65 PEAK FLOW RATE(CFS) = 17.97
**************************************************************************** FLOW PROCESS FROM NODE 312.00 TO NODE 315.00 IS CODE = 56 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 585.00 DOWNSTREAM(FEET) = 559.72 CHANNEL LENGTH THRU SUBAREA(FEET) = 399.00 CHANNEL SLOPE = 0.0634 GIVEN CHANNEL BASE(FEET) = 70.00 CHANNEL FREEBOARD(FEET) = 0.0 "Z" FACTOR = 2.500 MANNING'S FACTOR = 0.030
*ESTIMATED CHANNEL HEIGHT(FEET) = 0.12
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.248
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" D 3.63 0.20 1.000 93
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.20
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 22.94
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 2.93 AVERAGE FLOW DEPTH(FEET) = 0.11 TRAVEL TIME(MIN.) = 2.27 Tc(MIN.) = 10.06
SUBAREA AREA(ACRES) = 3.63 SUBAREA RUNOFF(CFS) = 9.96
EFFECTIVE AREA(ACRES) = 9.28 AREA-AVERAGED Fm(INCH/HR) = 0.21 AREA-AVERAGED Fp(INCH/HR) = 0.21 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 9.3 PEAK FLOW RATE(CFS) = 25.35
GIVEN CHANNEL BASE(FEET) = 70.00 CHANNEL FREEBOARD(FEET) = 0.0 "Z" FACTOR = 2.500 MANNING'S FACTOR = 0.030
*ESTIMATED CHANNEL HEIGHT(FEET) = 0.12
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 0.12 FLOW VELOCITY(FEET/SEC.) = 3.03
LONGEST FLOWPATH FROM NODE 310.00 TO NODE 315.00 = 709.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 315.00 TO NODE 316.00 IS CODE = 56 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 559.72 DOWNSTREAM(FEET) = 505.00 CHANNEL LENGTH THRU SUBAREA(FEET) = 682.00 CHANNEL SLOPE = 0.0802 GIVEN CHANNEL BASE(FEET) = 70.00 CHANNEL FREEBOARD(FEET) = 0.0 "Z" FACTOR = 2.500 MANNING'S FACTOR = 0.030
*ESTIMATED CHANNEL HEIGHT(FEET) = 0.14
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 2.802
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" C 1.71 0.25 1.000 91
NATURAL POOR COVER
"BARREN" D 6.66 0.20 1.000 93
NATURAL POOR COVER
"BARREN" A 0.69 0.40 1.000 78
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.22
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 35.85
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 3.79 AVERAGE FLOW DEPTH(FEET) = 0.13 TRAVEL TIME(MIN.) = 3.00 Tc(MIN.) = 13.06
SUBAREA AREA(ACRES) = 9.06 SUBAREA RUNOFF(CFS) = 21.01
EFFECTIVE AREA(ACRES) = 18.34 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.22 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 18.3 PEAK FLOW RATE(CFS) = 42.64
GIVEN CHANNEL BASE(FEET) = 70.00 CHANNEL FREEBOARD(FEET) = 0.0 "Z" FACTOR = 2.500 MANNING'S FACTOR = 0.030
*ESTIMATED CHANNEL HEIGHT(FEET) = 0.15
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 0.15 FLOW VELOCITY(FEET/SEC.) = 4.05
LONGEST FLOWPATH FROM NODE 310.00 TO NODE 316.00 = 1391.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 316.00 TO NODE 320.00 IS CODE = 56 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 505.00 DOWNSTREAM(FEET) = 449.09 CHANNEL LENGTH THRU SUBAREA(FEET) = 992.00 CHANNEL SLOPE = 0.0564 GIVEN CHANNEL BASE(FEET) = 70.00 CHANNEL FREEBOARD(FEET) = 0.0 "Z" FACTOR = 2.500 MANNING'S FACTOR = 0.030
*ESTIMATED CHANNEL HEIGHT(FEET) = 0.19
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 2.383
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" C 0.04 0.25 1.000 91
NATURAL POOR COVER
"BARREN" D 7.24 0.20 1.000 93
NATURAL POOR COVER
"BARREN" A 0.31 0.40 1.000 78
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.21
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 50.09
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 3.82 AVERAGE FLOW DEPTH(FEET) = 0.19 TRAVEL TIME(MIN.) = 4.33 Tc(MIN.) = 17.38
SUBAREA AREA(ACRES) = 7.59 SUBAREA RUNOFF(CFS) = 14.85
EFFECTIVE AREA(ACRES) = 25.93 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.22 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 25.9 PEAK FLOW RATE(CFS) = 50.58
GIVEN CHANNEL BASE(FEET) = 70.00 CHANNEL FREEBOARD(FEET) = 0.0 "Z" FACTOR = 2.500 MANNING'S FACTOR = 0.030
*ESTIMATED CHANNEL HEIGHT(FEET) = 0.19
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 0.19 FLOW VELOCITY(FEET/SEC.) = 3.82
LONGEST FLOWPATH FROM NODE 310.00 TO NODE 320.00 = 2383.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 320.00 TO NODE 320.00 IS CODE = 11 ---------------------------------------------------------------------------- >>>>>CONFLUENCE MEMORY BANK # 1 WITH THE MAIN-STREAM MEMORY<<<<< ============================================================================ ** MAIN STREAM CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 50.58 17.38 2.383 0.22( 0.22) 1.00 25.9 310.00
LONGEST FLOWPATH FROM NODE 310.00 TO NODE 320.00 = 2383.00 FEET. ** MEMORY BANK # 1 CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 30.64 17.29 2.390 0.24( 0.24) 1.00 15.8 300.00
LONGEST FLOWPATH FROM NODE 300.00 TO NODE 320.00 = 1854.00 FEET. ** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 81.13 17.29 2.390 0.22( 0.22) 1.00 41.6 300.00
2 81.12 17.38 2.383 0.22( 0.22) 1.00 41.8 310.00
TOTAL AREA(ACRES) = 41.8
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 81.13 Tc(MIN.) = 17.294
EFFECTIVE AREA(ACRES) = 41.62 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.22 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 41.8
LONGEST FLOWPATH FROM NODE 310.00 TO NODE 320.00 = 2383.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 320.00 TO NODE 320.00 IS CODE = 12 ---------------------------------------------------------------------------- >>>>>CLEAR MEMORY BANK # 1 <<<<<
============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 320.00 TO NODE 321.00 IS CODE = 56 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 449.09 DOWNSTREAM(FEET) = 438.56 CHANNEL LENGTH THRU SUBAREA(FEET) = 333.00 CHANNEL SLOPE = 0.0316 GIVEN CHANNEL BASE(FEET) = 10.00 CHANNEL FREEBOARD(FEET) = 0.0 "Z" FACTOR = 2.500 MANNING'S FACTOR = 0.030
*ESTIMATED CHANNEL HEIGHT(FEET) = 0.91
CHANNEL FLOW THRU SUBAREA(CFS) = 81.13
FLOW VELOCITY(FEET/SEC.) = 7.26 FLOW DEPTH(FEET) = 0.91 TRAVEL TIME(MIN.) = 0.76 Tc(MIN.) = 18.06
LONGEST FLOWPATH FROM NODE 310.00 TO NODE 321.00 = 2716.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 321.00 TO NODE 321.00 IS CODE = 10 ---------------------------------------------------------------------------- >>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 1 <<<<< ============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 500.00 TO NODE 505.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< ============================================================================ INITIAL SUBAREA FLOW-LENGTH(FEET) = 283.00
ELEVATION DATA: UPSTREAM(FEET) = 473.77 DOWNSTREAM(FEET) = 446.11 Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 7.996
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.698
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
NATURAL POOR COVER
"BARREN" D 2.80 0.20 1.000 93 8.00
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.20
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
SUBAREA RUNOFF(CFS) = 8.82
TOTAL AREA(ACRES) = 2.80 PEAK FLOW RATE(CFS) = 8.82
**************************************************************************** FLOW PROCESS FROM NODE 505.00 TO NODE 321.00 IS CODE = 56 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 446.11 DOWNSTREAM(FEET) = 438.56 CHANNEL LENGTH THRU SUBAREA(FEET) = 610.00 CHANNEL SLOPE = 0.0124 GIVEN CHANNEL BASE(FEET) = 10.00 CHANNEL FREEBOARD(FEET) = 0.0 "Z" FACTOR = 2.500 MANNING'S FACTOR = 0.030
*ESTIMATED CHANNEL HEIGHT(FEET) = 0.33
CHANNEL FLOW THRU SUBAREA(CFS) = 8.82
FLOW VELOCITY(FEET/SEC.) = 2.46 FLOW DEPTH(FEET) = 0.33 TRAVEL TIME(MIN.) = 4.13 Tc(MIN.) = 12.13
LONGEST FLOWPATH FROM NODE 500.00 TO NODE 321.00 = 893.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 321.00 TO NODE 321.00 IS CODE = 11 ---------------------------------------------------------------------------- >>>>>CONFLUENCE MEMORY BANK # 1 WITH THE MAIN-STREAM MEMORY<<<<< ============================================================================ ** MAIN STREAM CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 8.82 12.13 2.921 0.20( 0.20) 1.00 2.8 500.00
LONGEST FLOWPATH FROM NODE 500.00 TO NODE 321.00 = 893.00 FEET. ** MEMORY BANK # 1 CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 81.13 18.06 2.332 0.22( 0.22) 1.00 41.6 300.00
2 81.12 18.15 2.326 0.22( 0.22) 1.00 41.8 310.00
LONGEST FLOWPATH FROM NODE 310.00 TO NODE 321.00 = 2716.00 FEET. ** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 78.53 12.13 2.921 0.22( 0.22) 1.00 30.8 500.00
2 88.03 18.06 2.332 0.22( 0.22) 1.00 44.4 300.00
3 88.01 18.15 2.326 0.22( 0.22) 1.00 44.5 310.00
TOTAL AREA(ACRES) = 44.5
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 88.03 Tc(MIN.) = 18.059
EFFECTIVE AREA(ACRES) = 44.42 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.22 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 44.5
LONGEST FLOWPATH FROM NODE 310.00 TO NODE 321.00 = 2716.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 321.00 TO NODE 321.00 IS CODE = 12 ---------------------------------------------------------------------------- >>>>>CLEAR MEMORY BANK # 1 <<<<<
============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 321.00 TO NODE 325.00 IS CODE = 56 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 438.56 DOWNSTREAM(FEET) = 419.89 CHANNEL LENGTH THRU SUBAREA(FEET) = 455.00 CHANNEL SLOPE = 0.0410 GIVEN CHANNEL BASE(FEET) = 10.00 CHANNEL FREEBOARD(FEET) = 0.0 "Z" FACTOR = 2.500 MANNING'S FACTOR = 0.030
*ESTIMATED CHANNEL HEIGHT(FEET) = 0.95
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 2.269
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" D 11.84 0.20 1.000 93
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.20
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 99.06
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 8.44 AVERAGE FLOW DEPTH(FEET) = 0.95 TRAVEL TIME(MIN.) = 0.90 Tc(MIN.) = 18.96
SUBAREA AREA(ACRES) = 11.84 SUBAREA RUNOFF(CFS) = 22.04 EFFECTIVE AREA(ACRES) = 56.26 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.22 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 56.4 PEAK FLOW RATE(CFS) = 103.85
GIVEN CHANNEL BASE(FEET) = 10.00 CHANNEL FREEBOARD(FEET) = 0.0 "Z" FACTOR = 2.500 MANNING'S FACTOR = 0.030
*ESTIMATED CHANNEL HEIGHT(FEET) = 0.97
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 0.97 FLOW VELOCITY(FEET/SEC.) = 8.60
LONGEST FLOWPATH FROM NODE 310.00 TO NODE 325.00 = 3171.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 325.00 TO NODE 270.00 IS CODE = 52 ---------------------------------------------------------------------------- >>>>>COMPUTE NATURAL VALLEY CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 419.89 DOWNSTREAM(FEET) = 406.00 CHANNEL LENGTH THRU SUBAREA(FEET) = 568.00 CHANNEL SLOPE = 0.0245 CHANNEL FLOW THRU SUBAREA(CFS) = 103.85
FLOW VELOCITY(FEET/SEC) = 7.51 (PER LACFCD/RCFC&WCD HYDROLOGY MANUAL) TRAVEL TIME(MIN.) = 1.26 Tc(MIN.) = 20.22
LONGEST FLOWPATH FROM NODE 310.00 TO NODE 270.00 = 3739.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 270.00 TO NODE 270.00 IS CODE = 11 ---------------------------------------------------------------------------- >>>>>CONFLUENCE MEMORY BANK # 2 WITH THE MAIN-STREAM MEMORY<<<<< ============================================================================ ** MAIN STREAM CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 99.18 14.32 2.659 0.22( 0.22) 1.00 42.6 500.00
2 103.85 20.22 2.187 0.22( 0.22) 1.00 56.3 300.00
3 103.81 20.30 2.183 0.22( 0.22) 1.00 56.4 310.00
LONGEST FLOWPATH FROM NODE 310.00 TO NODE 270.00 = 3739.00 FEET. ** MEMORY BANK # 2 CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 25.80 10.30 3.205 0.21( 0.21) 1.00 9.6 265.00
LONGEST FLOWPATH FROM NODE 265.00 TO NODE 270.00 = 860.00 FEET. ** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 113.04 10.30 3.205 0.21( 0.21) 1.00 40.2 265.00
2 120.27 14.32 2.659 0.22( 0.22) 1.00 52.2 500.00
3 120.88 20.22 2.187 0.22( 0.22) 1.00 65.8 300.00
4 120.80 20.30 2.183 0.22( 0.22) 1.00 66.0 310.00
TOTAL AREA(ACRES) = 66.0
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 120.88 Tc(MIN.) = 20.219
EFFECTIVE AREA(ACRES) = 65.84 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.22 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 66.0
LONGEST FLOWPATH FROM NODE 310.00 TO NODE 270.00 = 3739.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 270.00 TO NODE 270.00 IS CODE = 12 ---------------------------------------------------------------------------- >>>>>CLEAR MEMORY BANK # 2 <<<<<
============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 270.00 TO NODE 260.00 IS CODE = 52 ---------------------------------------------------------------------------- >>>>>COMPUTE NATURAL VALLEY CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 406.00 DOWNSTREAM(FEET) = 400.00 CHANNEL LENGTH THRU SUBAREA(FEET) = 341.00 CHANNEL SLOPE = 0.0176 CHANNEL FLOW THRU SUBAREA(CFS) = 120.88
FLOW VELOCITY(FEET/SEC) = 6.67 (PER LACFCD/RCFC&WCD HYDROLOGY MANUAL) TRAVEL TIME(MIN.) = 0.85 Tc(MIN.) = 21.07
LONGEST FLOWPATH FROM NODE 310.00 TO NODE 260.00 = 4080.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 260.00 TO NODE 260.00 IS CODE = 11 ---------------------------------------------------------------------------- >>>>>CONFLUENCE MEMORY BANK # 3 WITH THE MAIN-STREAM MEMORY<<<<< ============================================================================ ** MAIN STREAM CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 113.04 11.17 3.061 0.21( 0.21) 1.00 40.2 265.00
2 120.27 15.18 2.573 0.22( 0.22) 1.00 52.2 500.00
3 120.88 21.07 2.137 0.22( 0.22) 1.00 65.8 300.00
4 120.80 21.15 2.132 0.22( 0.22) 1.00 66.0 310.00
LONGEST FLOWPATH FROM NODE 310.00 TO NODE 260.00 = 4080.00 FEET. ** MEMORY BANK # 3 CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 212.41 17.61 2.366 0.24( 0.24) 1.00 93.6 250.00
2 212.06 23.16 2.026 0.24( 0.24) 1.00 112.0 235.00
3 197.12 32.76 1.665 0.24( 0.24) 1.00 135.8 215.00
4 195.07 34.85 1.607 0.24( 0.24) 1.00 141.2 200.00
5 194.73 34.94 1.605 0.24( 0.24) 1.00 141.2 210.00
LONGEST FLOWPATH FROM NODE 200.00 TO NODE 260.00 = 5667.00 FEET. ** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 291.84 11.17 3.061 0.23( 0.23) 1.00 99.6 265.00
2 321.24 15.18 2.573 0.23( 0.23) 1.00 132.9 500.00
3 332.93 17.61 2.366 0.23( 0.23) 1.00 151.4 250.00
4 333.07 21.07 2.137 0.23( 0.23) 1.00 170.9 300.00
5 332.98 21.15 2.132 0.23( 0.23) 1.00 171.3 310.00
6 326.13 23.16 2.026 0.23( 0.23) 1.00 178.0 235.00
7 288.43 32.76 1.665 0.23( 0.23) 1.00 201.7 215.00
8 282.76 34.85 1.607 0.23( 0.23) 1.00 207.1 200.00
9 282.27 34.94 1.605 0.23( 0.23) 1.00 207.2 210.00
TOTAL AREA(ACRES) = 207.2
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 333.07 Tc(MIN.) = 21.071
EFFECTIVE AREA(ACRES) = 170.92 AREA-AVERAGED Fm(INCH/HR) = 0.23 AREA-AVERAGED Fp(INCH/HR) = 0.23 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 207.2
LONGEST FLOWPATH FROM NODE 200.00 TO NODE 260.00 = 5667.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 260.00 TO NODE 260.00 IS CODE = 12 ---------------------------------------------------------------------------- >>>>>CLEAR MEMORY BANK # 3 <<<<<
============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 260.00 TO NODE 299.00 IS CODE = 52 ---------------------------------------------------------------------------- >>>>>COMPUTE NATURAL VALLEY CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 400.00 DOWNSTREAM(FEET) = 398.00 CHANNEL LENGTH THRU SUBAREA(FEET) = 165.00 CHANNEL SLOPE = 0.0121 CHANNEL FLOW THRU SUBAREA(CFS) = 333.07
FLOW VELOCITY(FEET/SEC) = 7.58 (PER LACFCD/RCFC&WCD HYDROLOGY MANUAL) TRAVEL TIME(MIN.) = 0.36 Tc(MIN.) = 21.43
LONGEST FLOWPATH FROM NODE 200.00 TO NODE 299.00 = 5832.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 400.00 TO NODE 402.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< ============================================================================ INITIAL SUBAREA FLOW-LENGTH(FEET) = 326.00
ELEVATION DATA: UPSTREAM(FEET) = 858.53 DOWNSTREAM(FEET) = 740.00 Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 6.506
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 4.156
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
NATURAL POOR COVER
"BARREN" C 1.90 0.25 1.000 91 6.51
NATURAL POOR COVER
"BARREN" D 0.47 0.20 1.000 93 6.51
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.24
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
SUBAREA RUNOFF(CFS) = 8.35
TOTAL AREA(ACRES) = 2.37 PEAK FLOW RATE(CFS) = 8.35
**************************************************************************** FLOW PROCESS FROM NODE 402.00 TO NODE 405.00 IS CODE = 51 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 740.00 DOWNSTREAM(FEET) = 648.00 CHANNEL LENGTH THRU SUBAREA(FEET) = 827.00 CHANNEL SLOPE = 0.1112 CHANNEL BASE(FEET) = 0.00 "Z" FACTOR = 2.500
MANNING'S FACTOR = 0.030 MAXIMUM DEPTH(FEET) = 10.00
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.667
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" C 1.14 0.25 1.000 91
NATURAL POOR COVER
"BARREN" D 2.56 0.20 1.000 93
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.22
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 14.11
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 8.57 AVERAGE FLOW DEPTH(FEET) = 0.81 TRAVEL TIME(MIN.) = 1.61 Tc(MIN.) = 8.11
SUBAREA AREA(ACRES) = 3.70 SUBAREA RUNOFF(CFS) = 11.50
EFFECTIVE AREA(ACRES) = 6.07 AREA-AVERAGED Fm(INCH/HR) = 0.23 AREA-AVERAGED Fp(INCH/HR) = 0.23 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 6.1 PEAK FLOW RATE(CFS) = 18.81
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 0.90 FLOW VELOCITY(FEET/SEC.) = 9.22
LONGEST FLOWPATH FROM NODE 400.00 TO NODE 405.00 = 1153.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 405.00 TO NODE 405.00 IS CODE = 10 ---------------------------------------------------------------------------- >>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 1 <<<<< ============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 800.00 TO NODE 403.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< ============================================================================ INITIAL SUBAREA FLOW-LENGTH(FEET) = 320.00
ELEVATION DATA: UPSTREAM(FEET) = 874.02 DOWNSTREAM(FEET) = 734.00 Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 6.223
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 4.262
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
NATURAL POOR COVER
"BARREN" C 1.30 0.25 1.000 91 6.22
NATURAL POOR COVER
"BARREN" D 1.42 0.20 1.000 93 6.22
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.22
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
SUBAREA RUNOFF(CFS) = 9.88
TOTAL AREA(ACRES) = 2.72 PEAK FLOW RATE(CFS) = 9.88
**************************************************************************** FLOW PROCESS FROM NODE 403.00 TO NODE 408.00 IS CODE = 51 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 734.00 DOWNSTREAM(FEET) = 671.73 CHANNEL LENGTH THRU SUBAREA(FEET) = 320.00 CHANNEL SLOPE = 0.1946 CHANNEL BASE(FEET) = 0.00 "Z" FACTOR = 2.500
MANNING'S FACTOR = 0.030 MAXIMUM DEPTH(FEET) = 10.00
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 4.074
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" D 1.58 0.20 1.000 93
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.20
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 12.64
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 10.35 AVERAGE FLOW DEPTH(FEET) = 0.70 TRAVEL TIME(MIN.) = 0.52 Tc(MIN.) = 6.74
SUBAREA AREA(ACRES) = 1.58 SUBAREA RUNOFF(CFS) = 5.51
EFFECTIVE AREA(ACRES) = 4.30 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.22 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 4.3 PEAK FLOW RATE(CFS) = 14.93
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 0.74 FLOW VELOCITY(FEET/SEC.) = 10.77
LONGEST FLOWPATH FROM NODE 800.00 TO NODE 408.00 = 640.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 408.00 TO NODE 408.00 IS CODE = 10 ---------------------------------------------------------------------------- >>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 2 <<<<< ============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 406.00 TO NODE 407.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< ============================================================================ INITIAL SUBAREA FLOW-LENGTH(FEET) = 178.00
ELEVATION DATA: UPSTREAM(FEET) = 1058.19 DOWNSTREAM(FEET) = 984.25 Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 5.000
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 4.824
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
NATURAL POOR COVER
"BARREN" C 2.11 0.25 1.000 91 5.00
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
SUBAREA RUNOFF(CFS) = 8.69
TOTAL AREA(ACRES) = 2.11 PEAK FLOW RATE(CFS) = 8.69
**************************************************************************** FLOW PROCESS FROM NODE 407.00 TO NODE 408.00 IS CODE = 51 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 984.25 DOWNSTREAM(FEET) = 671.73 CHANNEL LENGTH THRU SUBAREA(FEET) = 1509.00 CHANNEL SLOPE = 0.2071 CHANNEL BASE(FEET) = 0.00 "Z" FACTOR = 2.500
MANNING'S FACTOR = 0.030 MAXIMUM DEPTH(FEET) = 10.00
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 4.057
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" C 11.69 0.25 1.000 91
NATURAL POOR COVER
"BARREN" D 6.59 0.20 1.000 93
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.23
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 40.34
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 14.07 AVERAGE FLOW DEPTH(FEET) = 1.07 TRAVEL TIME(MIN.) = 1.79 Tc(MIN.) = 6.79
SUBAREA AREA(ACRES) = 18.28 SUBAREA RUNOFF(CFS) = 62.93 EFFECTIVE AREA(ACRES) = 20.39 AREA-AVERAGED Fm(INCH/HR) = 0.23 AREA-AVERAGED Fp(INCH/HR) = 0.23 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 20.4 PEAK FLOW RATE(CFS) = 70.16
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 1.32 FLOW VELOCITY(FEET/SEC.) = 16.23
LONGEST FLOWPATH FROM NODE 406.00 TO NODE 408.00 = 1687.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 408.00 TO NODE 408.00 IS CODE = 11 ---------------------------------------------------------------------------- >>>>>CONFLUENCE MEMORY BANK # 2 WITH THE MAIN-STREAM MEMORY<<<<< ============================================================================ ** MAIN STREAM CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 70.16 6.79 4.057 0.23( 0.23) 1.00 20.4 406.00
LONGEST FLOWPATH FROM NODE 406.00 TO NODE 408.00 = 1687.00 FEET. ** MEMORY BANK # 2 CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 14.93 6.74 4.074 0.22( 0.22) 1.00 4.3 800.00
LONGEST FLOWPATH FROM NODE 800.00 TO NODE 408.00 = 640.00 FEET. ** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 84.90 6.74 4.074 0.23( 0.23) 1.00 24.5 800.00
2 85.03 6.79 4.057 0.23( 0.23) 1.00 24.7 406.00
TOTAL AREA(ACRES) = 24.7
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 85.03 Tc(MIN.) = 6.788
EFFECTIVE AREA(ACRES) = 24.69 AREA-AVERAGED Fm(INCH/HR) = 0.23 AREA-AVERAGED Fp(INCH/HR) = 0.23 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 24.7
LONGEST FLOWPATH FROM NODE 406.00 TO NODE 408.00 = 1687.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 408.00 TO NODE 408.00 IS CODE = 12 ---------------------------------------------------------------------------- >>>>>CLEAR MEMORY BANK # 2 <<<<<
============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 408.00 TO NODE 405.00 IS CODE = 51 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 671.73 DOWNSTREAM(FEET) = 648.00 CHANNEL LENGTH THRU SUBAREA(FEET) = 563.00 CHANNEL SLOPE = 0.0421 CHANNEL BASE(FEET) = 0.00 "Z" FACTOR = 2.500
MANNING'S FACTOR = 0.030 MAXIMUM DEPTH(FEET) = 10.00
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.755
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" C 0.66 0.25 1.000 91
NATURAL POOR COVER
"BARREN" D 0.96 0.20 1.000 93
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.22
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 87.61
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 9.43 AVERAGE FLOW DEPTH(FEET) = 1.93 TRAVEL TIME(MIN.) = 0.99 Tc(MIN.) = 7.78
SUBAREA AREA(ACRES) = 1.62 SUBAREA RUNOFF(CFS) = 5.15
EFFECTIVE AREA(ACRES) = 26.31 AREA-AVERAGED Fm(INCH/HR) = 0.23 AREA-AVERAGED Fp(INCH/HR) = 0.23 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 26.3 PEAK FLOW RATE(CFS) = 85.03
NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 1.90 FLOW VELOCITY(FEET/SEC.) = 9.38
LONGEST FLOWPATH FROM NODE 406.00 TO NODE 405.00 = 2250.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 405.00 TO NODE 405.00 IS CODE = 11 ---------------------------------------------------------------------------- >>>>>CONFLUENCE MEMORY BANK # 1 WITH THE MAIN-STREAM MEMORY<<<<< ============================================================================ ** MAIN STREAM CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 84.90 7.73 3.769 0.23( 0.23) 1.00 26.2 800.00
2 85.03 7.78 3.755 0.23( 0.23) 1.00 26.3 406.00
LONGEST FLOWPATH FROM NODE 406.00 TO NODE 405.00 = 2250.00 FEET. ** MEMORY BANK # 1 CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 18.81 8.11 3.667 0.23( 0.23) 1.00 6.1 400.00
LONGEST FLOWPATH FROM NODE 400.00 TO NODE 405.00 = 1153.00 FEET. ** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 103.34 7.73 3.769 0.23( 0.23) 1.00 31.9 800.00
2 103.53 7.78 3.755 0.23( 0.23) 1.00 32.1 406.00
3 101.72 8.11 3.667 0.23( 0.23) 1.00 32.4 400.00
TOTAL AREA(ACRES) = 32.4
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 103.53 Tc(MIN.) = 7.783
EFFECTIVE AREA(ACRES) = 32.13 AREA-AVERAGED Fm(INCH/HR) = 0.23 AREA-AVERAGED Fp(INCH/HR) = 0.23 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 32.4
LONGEST FLOWPATH FROM NODE 406.00 TO NODE 405.00 = 2250.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 405.00 TO NODE 405.00 IS CODE = 12 ---------------------------------------------------------------------------- >>>>>CLEAR MEMORY BANK # 1 <<<<<
============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 405.00 TO NODE 410.00 IS CODE = 51 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 648.00 DOWNSTREAM(FEET) = 633.77 CHANNEL LENGTH THRU SUBAREA(FEET) = 707.00 CHANNEL SLOPE = 0.0201 CHANNEL BASE(FEET) = 0.00 "Z" FACTOR = 2.500
MANNING'S FACTOR = 0.030 MAXIMUM DEPTH(FEET) = 10.00
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.388
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" C 2.98 0.25 1.000 91
NATURAL POOR COVER
"BARREN" D 3.60 0.20 1.000 93
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.22
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 112.91 TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 7.61 AVERAGE FLOW DEPTH(FEET) = 2.44 TRAVEL TIME(MIN.) = 1.55 Tc(MIN.) = 9.33
SUBAREA AREA(ACRES) = 6.58 SUBAREA RUNOFF(CFS) = 18.75
EFFECTIVE AREA(ACRES) = 38.71 AREA-AVERAGED Fm(INCH/HR) = 0.23 AREA-AVERAGED Fp(INCH/HR) = 0.23 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 39.0 PEAK FLOW RATE(CFS) = 110.11
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 2.41 FLOW VELOCITY(FEET/SEC.) = 7.56
LONGEST FLOWPATH FROM NODE 406.00 TO NODE 410.00 = 2957.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 410.00 TO NODE 420.00 IS CODE = 51 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 633.77 DOWNSTREAM(FEET) = 612.75 CHANNEL LENGTH THRU SUBAREA(FEET) = 1022.00 CHANNEL SLOPE = 0.0206 CHANNEL BASE(FEET) = 0.00 "Z" FACTOR = 2.500
MANNING'S FACTOR = 0.030 MAXIMUM DEPTH(FEET) = 10.00
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.020
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" A 1.92 0.40 1.000 78
NATURAL POOR COVER
"BARREN" C 11.60 0.25 1.000 91
NATURAL POOR COVER
"BARREN" D 8.26 0.20 1.000 93
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.24
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 137.33 TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 8.09 AVERAGE FLOW DEPTH(FEET) = 2.61 TRAVEL TIME(MIN.) = 2.11 Tc(MIN.) = 11.44
SUBAREA AREA(ACRES) = 21.78 SUBAREA RUNOFF(CFS) = 54.41 EFFECTIVE AREA(ACRES) = 60.49 AREA-AVERAGED Fm(INCH/HR) = 0.23 AREA-AVERAGED Fp(INCH/HR) = 0.23 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 60.7 PEAK FLOW RATE(CFS) = 151.67
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 2.71 FLOW VELOCITY(FEET/SEC.) = 8.29
LONGEST FLOWPATH FROM NODE 406.00 TO NODE 420.00 = 3979.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 420.00 TO NODE 420.00 IS CODE = 10 ---------------------------------------------------------------------------- >>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 1 <<<<< ============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 411.00 TO NODE 412.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< ============================================================================ INITIAL SUBAREA FLOW-LENGTH(FEET) = 239.00
ELEVATION DATA: UPSTREAM(FEET) = 1140.97 DOWNSTREAM(FEET) = 1082.68 Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 6.224
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 4.261
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
NATURAL POOR COVER
"BARREN" D 1.26 0.20 1.000 93 6.22
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.20
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
SUBAREA RUNOFF(CFS) = 4.61
TOTAL AREA(ACRES) = 1.26 PEAK FLOW RATE(CFS) = 4.61
**************************************************************************** FLOW PROCESS FROM NODE 412.00 TO NODE 415.00 IS CODE = 51 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 1082.68 DOWNSTREAM(FEET) = 706.33 CHANNEL LENGTH THRU SUBAREA(FEET) = 1409.00 CHANNEL SLOPE = 0.2671 CHANNEL BASE(FEET) = 0.00 "Z" FACTOR = 2.500
MANNING'S FACTOR = 0.030 MAXIMUM DEPTH(FEET) = 10.00
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.737
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" C 1.62 0.25 1.000 91
NATURAL POOR COVER
"BARREN" D 14.57 0.20 1.000 93
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.21
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 30.43
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 14.43 AVERAGE FLOW DEPTH(FEET) = 0.92 TRAVEL TIME(MIN.) = 1.63 Tc(MIN.) = 7.85
SUBAREA AREA(ACRES) = 16.19 SUBAREA RUNOFF(CFS) = 51.46 EFFECTIVE AREA(ACRES) = 17.45 AREA-AVERAGED Fm(INCH/HR) = 0.20 AREA-AVERAGED Fp(INCH/HR) = 0.20 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 17.5 PEAK FLOW RATE(CFS) = 55.47
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 1.15 FLOW VELOCITY(FEET/SEC.) = 16.86
LONGEST FLOWPATH FROM NODE 411.00 TO NODE 415.00 = 1648.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 415.00 TO NODE 415.00 IS CODE = 10 ---------------------------------------------------------------------------- >>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 2 <<<<< ============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 413.00 TO NODE 414.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< ============================================================================ INITIAL SUBAREA FLOW-LENGTH(FEET) = 273.00
ELEVATION DATA: UPSTREAM(FEET) = 1101.23 DOWNSTREAM(FEET) = 1025.31 Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 6.394
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 4.197
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
NATURAL POOR COVER
"BARREN" C 2.34 0.25 1.000 91 6.39
NATURAL POOR COVER
"BARREN" D 3.50 0.20 1.000 93 6.39
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.22
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
SUBAREA RUNOFF(CFS) = 20.90
TOTAL AREA(ACRES) = 5.84 PEAK FLOW RATE(CFS) = 20.90
**************************************************************************** FLOW PROCESS FROM NODE 414.00 TO NODE 415.00 IS CODE = 51 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 1025.31 DOWNSTREAM(FEET) = 706.33 CHANNEL LENGTH THRU SUBAREA(FEET) = 1345.00 CHANNEL SLOPE = 0.2372 CHANNEL BASE(FEET) = 0.00 "Z" FACTOR = 2.500
MANNING'S FACTOR = 0.030 MAXIMUM DEPTH(FEET) = 10.00
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.741
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" C 8.55 0.25 1.000 91
NATURAL POOR COVER
"BARREN" D 8.56 0.20 1.000 93
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.22
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 48.02
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 15.56 AVERAGE FLOW DEPTH(FEET) = 1.11 TRAVEL TIME(MIN.) = 1.44 Tc(MIN.) = 7.83
SUBAREA AREA(ACRES) = 17.11 SUBAREA RUNOFF(CFS) = 54.14 EFFECTIVE AREA(ACRES) = 22.95 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.22 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 23.0 PEAK FLOW RATE(CFS) = 72.65
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 1.30 FLOW VELOCITY(FEET/SEC.) = 17.20
LONGEST FLOWPATH FROM NODE 413.00 TO NODE 415.00 = 1618.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 415.00 TO NODE 415.00 IS CODE = 11 ---------------------------------------------------------------------------- >>>>>CONFLUENCE MEMORY BANK # 2 WITH THE MAIN-STREAM MEMORY<<<<< ============================================================================ ** MAIN STREAM CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 72.65 7.83 3.741 0.22( 0.22) 1.00 23.0 413.00
LONGEST FLOWPATH FROM NODE 413.00 TO NODE 415.00 = 1618.00 FEET. ** MEMORY BANK # 2 CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 55.47 7.85 3.737 0.20( 0.20) 1.00 17.5 411.00
LONGEST FLOWPATH FROM NODE 411.00 TO NODE 415.00 = 1648.00 FEET. ** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 128.07 7.83 3.741 0.22( 0.22) 1.00 40.4 413.00
2 128.02 7.85 3.737 0.22( 0.22) 1.00 40.4 411.00
TOTAL AREA(ACRES) = 40.4
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 128.07 Tc(MIN.) = 7.835
EFFECTIVE AREA(ACRES) = 40.36 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.22 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 40.4
LONGEST FLOWPATH FROM NODE 411.00 TO NODE 415.00 = 1648.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 415.00 TO NODE 415.00 IS CODE = 12 ---------------------------------------------------------------------------- >>>>>CLEAR MEMORY BANK # 2 <<<<<
============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 415.00 TO NODE 416.00 IS CODE = 51 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 706.33 DOWNSTREAM(FEET) = 642.73 CHANNEL LENGTH THRU SUBAREA(FEET) = 1121.00 CHANNEL SLOPE = 0.0567 CHANNEL BASE(FEET) = 0.00 "Z" FACTOR = 2.500
MANNING'S FACTOR = 0.030 MAXIMUM DEPTH(FEET) = 10.00
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.379
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" C 9.92 0.25 1.000 91
NATURAL POOR COVER
"BARREN" D 6.02 0.20 1.000 93
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.23
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 150.66 TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 12.09 AVERAGE FLOW DEPTH(FEET) = 2.23 TRAVEL TIME(MIN.) = 1.55 Tc(MIN.) = 9.38
SUBAREA AREA(ACRES) = 15.94 SUBAREA RUNOFF(CFS) = 45.15 EFFECTIVE AREA(ACRES) = 56.30 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.22 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 56.3 PEAK FLOW RATE(CFS) = 160.06
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 2.28 FLOW VELOCITY(FEET/SEC.) = 12.27
LONGEST FLOWPATH FROM NODE 411.00 TO NODE 416.00 = 2769.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 416.00 TO NODE 416.10 IS CODE = 51 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 642.73 DOWNSTREAM(FEET) = 639.92 CHANNEL LENGTH THRU SUBAREA(FEET) = 260.00 CHANNEL SLOPE = 0.0108 CHANNEL BASE(FEET) = 0.00 "Z" FACTOR = 2.500
MANNING'S FACTOR = 0.030 MAXIMUM DEPTH(FEET) = 10.00
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.253
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" C 3.39 0.25 1.000 91
NATURAL POOR COVER
"BARREN" D 0.70 0.20 1.000 93
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.24
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 165.60 TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 6.65 AVERAGE FLOW DEPTH(FEET) = 3.16 TRAVEL TIME(MIN.) = 0.65 Tc(MIN.) = 10.03
SUBAREA AREA(ACRES) = 4.09 SUBAREA RUNOFF(CFS) = 11.08
EFFECTIVE AREA(ACRES) = 60.39 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.22 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 60.4 PEAK FLOW RATE(CFS) = 164.76
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 3.15 FLOW VELOCITY(FEET/SEC.) = 6.63
LONGEST FLOWPATH FROM NODE 411.00 TO NODE 416.10 = 3029.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 416.10 TO NODE 419.00 IS CODE = 51 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 639.92 DOWNSTREAM(FEET) = 625.00 CHANNEL LENGTH THRU SUBAREA(FEET) = 730.00 CHANNEL SLOPE = 0.0204 CHANNEL BASE(FEET) = 0.00 "Z" FACTOR = 2.500
MANNING'S FACTOR = 0.030 MAXIMUM DEPTH(FEET) = 10.00
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.016
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" A 0.03 0.40 1.000 78
NATURAL POOR COVER
"BARREN" C 0.36 0.25 1.000 91
NATURAL POOR COVER
"BARREN" D 1.91 0.20 1.000 93
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.21
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 167.66 TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 8.48 AVERAGE FLOW DEPTH(FEET) = 2.81 TRAVEL TIME(MIN.) = 1.43 Tc(MIN.) = 11.47
SUBAREA AREA(ACRES) = 2.30 SUBAREA RUNOFF(CFS) = 5.81
EFFECTIVE AREA(ACRES) = 62.69 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.22 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 62.7 PEAK FLOW RATE(CFS) = 164.76
NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 2.80 FLOW VELOCITY(FEET/SEC.) = 8.42
LONGEST FLOWPATH FROM NODE 411.00 TO NODE 419.00 = 3759.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 419.00 TO NODE 419.00 IS CODE = 10 ---------------------------------------------------------------------------- >>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 2 <<<<< ============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 417.00 TO NODE 418.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< ============================================================================ INITIAL SUBAREA FLOW-LENGTH(FEET) = 329.00
ELEVATION DATA: UPSTREAM(FEET) = 860.00 DOWNSTREAM(FEET) = 715.00 Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 6.284
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 4.239
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
NATURAL POOR COVER
"BARREN" C 2.22 0.25 1.000 91 6.28
NATURAL POOR COVER
"BARREN" D 1.21 0.20 1.000 93 6.28
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.23
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
SUBAREA RUNOFF(CFS) = 12.37
TOTAL AREA(ACRES) = 3.43 PEAK FLOW RATE(CFS) = 12.37
**************************************************************************** FLOW PROCESS FROM NODE 418.00 TO NODE 419.00 IS CODE = 51 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 715.00 DOWNSTREAM(FEET) = 625.00 CHANNEL LENGTH THRU SUBAREA(FEET) = 600.00 CHANNEL SLOPE = 0.1500 CHANNEL BASE(FEET) = 0.00 "Z" FACTOR = 2.500
MANNING'S FACTOR = 0.030 MAXIMUM DEPTH(FEET) = 10.00
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.920
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" C 0.75 0.25 1.000 91
NATURAL POOR COVER
"BARREN" D 5.02 0.20 1.000 93
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.21
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 22.01
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 10.75 AVERAGE FLOW DEPTH(FEET) = 0.91 TRAVEL TIME(MIN.) = 0.93 Tc(MIN.) = 7.21
SUBAREA AREA(ACRES) = 5.77 SUBAREA RUNOFF(CFS) = 19.28
EFFECTIVE AREA(ACRES) = 9.20 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.22 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 9.2 PEAK FLOW RATE(CFS) = 30.67
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 1.03 FLOW VELOCITY(FEET/SEC.) = 11.67
LONGEST FLOWPATH FROM NODE 417.00 TO NODE 419.00 = 929.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 419.00 TO NODE 419.00 IS CODE = 11 ---------------------------------------------------------------------------- >>>>>CONFLUENCE MEMORY BANK # 2 WITH THE MAIN-STREAM MEMORY<<<<< ============================================================================ ** MAIN STREAM CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 30.67 7.21 3.920 0.22( 0.22) 1.00 9.2 417.00
LONGEST FLOWPATH FROM NODE 417.00 TO NODE 419.00 = 929.00 FEET. ** MEMORY BANK # 2 CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 164.76 11.47 3.016 0.22( 0.22) 1.00 62.7 413.00
2 164.68 11.48 3.013 0.22( 0.22) 1.00 62.7 411.00
LONGEST FLOWPATH FROM NODE 411.00 TO NODE 419.00 = 3759.00 FEET. ** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 167.87 7.21 3.920 0.22( 0.22) 1.00 48.6 417.00
2 187.94 11.47 3.016 0.22( 0.22) 1.00 71.9 413.00
3 187.84 11.48 3.013 0.22( 0.22) 1.00 71.9 411.00
TOTAL AREA(ACRES) = 71.9
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 187.94 Tc(MIN.) = 11.466
EFFECTIVE AREA(ACRES) = 71.89 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.22 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 71.9
LONGEST FLOWPATH FROM NODE 411.00 TO NODE 419.00 = 3759.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 419.00 TO NODE 419.00 IS CODE = 12 ---------------------------------------------------------------------------- >>>>>CLEAR MEMORY BANK # 2 <<<<<
============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 419.00 TO NODE 420.00 IS CODE = 51 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 625.00 DOWNSTREAM(FEET) = 612.75 CHANNEL LENGTH THRU SUBAREA(FEET) = 902.00 CHANNEL SLOPE = 0.0136 CHANNEL BASE(FEET) = 0.00 "Z" FACTOR = 2.500
MANNING'S FACTOR = 0.030 MAXIMUM DEPTH(FEET) = 10.00
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 2.754
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" A 1.29 0.40 1.000 78
NATURAL POOR COVER
"BARREN" C 5.48 0.25 1.000 91
NATURAL POOR COVER
"BARREN" D 0.61 0.20 1.000 93
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.27
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 196.18 TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 7.55 AVERAGE FLOW DEPTH(FEET) = 3.22 TRAVEL TIME(MIN.) = 1.99 Tc(MIN.) = 13.46
SUBAREA AREA(ACRES) = 7.38 SUBAREA RUNOFF(CFS) = 16.49
EFFECTIVE AREA(ACRES) = 79.27 AREA-AVERAGED Fm(INCH/HR) = 0.23 AREA-AVERAGED Fp(INCH/HR) = 0.23 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 79.3 PEAK FLOW RATE(CFS) = 187.94
NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 3.17 FLOW VELOCITY(FEET/SEC.) = 7.48
LONGEST FLOWPATH FROM NODE 411.00 TO NODE 420.00 = 4661.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 420.00 TO NODE 420.00 IS CODE = 11 ---------------------------------------------------------------------------- >>>>>CONFLUENCE MEMORY BANK # 1 WITH THE MAIN-STREAM MEMORY<<<<< ============================================================================ ** MAIN STREAM CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 167.87 9.25 3.405 0.23( 0.23) 1.00 56.0 417.00
2 187.94 13.46 2.754 0.23( 0.23) 1.00 79.3 413.00
3 187.84 13.48 2.752 0.23( 0.23) 1.00 79.3 411.00
LONGEST FLOWPATH FROM NODE 411.00 TO NODE 420.00 = 4661.00 FEET. ** MEMORY BANK # 1 CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 151.65 11.38 3.028 0.23( 0.23) 1.00 60.3 800.00
2 151.67 11.44 3.020 0.23( 0.23) 1.00 60.5 406.00
3 149.57 11.78 2.970 0.23( 0.23) 1.00 60.7 400.00
LONGEST FLOWPATH FROM NODE 406.00 TO NODE 420.00 = 3979.00 FEET. ** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 307.75 9.25 3.405 0.23( 0.23) 1.00 105.0 417.00
2 329.69 11.38 3.028 0.23( 0.23) 1.00 128.1 800.00
3 329.97 11.44 3.020 0.23( 0.23) 1.00 128.6 406.00
4 329.50 11.78 2.970 0.23( 0.23) 1.00 130.7 400.00
5 325.72 13.46 2.754 0.23( 0.23) 1.00 140.0 413.00
6 325.51 13.48 2.752 0.23( 0.23) 1.00 140.0 411.00
TOTAL AREA(ACRES) = 140.0
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 329.97 Tc(MIN.) = 11.438
EFFECTIVE AREA(ACRES) = 128.60 AREA-AVERAGED Fm(INCH/HR) = 0.23 AREA-AVERAGED Fp(INCH/HR) = 0.23 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 140.0
LONGEST FLOWPATH FROM NODE 411.00 TO NODE 420.00 = 4661.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 420.00 TO NODE 420.00 IS CODE = 12 ---------------------------------------------------------------------------- >>>>>CLEAR MEMORY BANK # 1 <<<<<
============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 420.00 TO NODE 421.00 IS CODE = 51 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 612.75 DOWNSTREAM(FEET) = 574.00 CHANNEL LENGTH THRU SUBAREA(FEET) = 185.00 CHANNEL SLOPE = 0.2095 CHANNEL BASE(FEET) = 0.00 "Z" FACTOR = 2.500
MANNING'S FACTOR = 0.030 MAXIMUM DEPTH(FEET) = 10.00
CHANNEL FLOW THRU SUBAREA(CFS) = 329.97
FLOW VELOCITY(FEET/SEC.) = 24.00 FLOW DEPTH(FEET) = 2.35 TRAVEL TIME(MIN.) = 0.13 Tc(MIN.) = 11.57
LONGEST FLOWPATH FROM NODE 411.00 TO NODE 421.00 = 4846.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 423.00 TO NODE 424.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< ============================================================================ INITIAL SUBAREA FLOW-LENGTH(FEET) = 186.00
ELEVATION DATA: UPSTREAM(FEET) = 584.02 DOWNSTREAM(FEET) = 508.34 Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 5.082
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 4.779
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
NATURAL POOR COVER
"BARREN" A 2.50 0.40 1.000 78 5.08
NATURAL POOR COVER
"BARREN" C 0.32 0.25 1.000 91 5.08
NATURAL POOR COVER
"BARREN" D 1.77 0.20 1.000 93 5.08
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.31
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
SUBAREA RUNOFF(CFS) = 18.45
TOTAL AREA(ACRES) = 4.59 PEAK FLOW RATE(CFS) = 18.45
**************************************************************************** FLOW PROCESS FROM NODE 424.00 TO NODE 425.00 IS CODE = 51 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 508.34 DOWNSTREAM(FEET) = 492.05 CHANNEL LENGTH THRU SUBAREA(FEET) = 228.00 CHANNEL SLOPE = 0.0714 CHANNEL BASE(FEET) = 0.00 "Z" FACTOR = 2.500
MANNING'S FACTOR = 0.030 MAXIMUM DEPTH(FEET) = 10.00
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 4.552
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" A 2.88 0.40 1.000 78
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 23.83
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 8.31 AVERAGE FLOW DEPTH(FEET) = 1.07 TRAVEL TIME(MIN.) = 0.46 Tc(MIN.) = 5.54
SUBAREA AREA(ACRES) = 2.88 SUBAREA RUNOFF(CFS) = 10.76
EFFECTIVE AREA(ACRES) = 7.47 AREA-AVERAGED Fm(INCH/HR) = 0.35 AREA-AVERAGED Fp(INCH/HR) = 0.35 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 7.5 PEAK FLOW RATE(CFS) = 28.27
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 1.14 FLOW VELOCITY(FEET/SEC.) = 8.68
LONGEST FLOWPATH FROM NODE 423.00 TO NODE 425.00 = 414.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 600.00 TO NODE 602.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< ============================================================================ INITIAL SUBAREA FLOW-LENGTH(FEET) = 241.00
ELEVATION DATA: UPSTREAM(FEET) = 547.51 DOWNSTREAM(FEET) = 485.30 Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 6.174
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 4.281
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
NATURAL POOR COVER
"BARREN" C 1.07 0.25 1.000 91 6.17
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
SUBAREA RUNOFF(CFS) = 3.88
TOTAL AREA(ACRES) = 1.07 PEAK FLOW RATE(CFS) = 3.88
**************************************************************************** FLOW PROCESS FROM NODE 602.00 TO NODE 605.00 IS CODE = 56 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 485.30 DOWNSTREAM(FEET) = 443.59 CHANNEL LENGTH THRU SUBAREA(FEET) = 259.00 CHANNEL SLOPE = 0.1610 GIVEN CHANNEL BASE(FEET) = 100.00 CHANNEL FREEBOARD(FEET) = 0.0 "Z" FACTOR = 2.500 MANNING'S FACTOR = 0.030
*ESTIMATED CHANNEL HEIGHT(FEET) = 0.04
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.626
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" C 1.95 0.25 1.000 91
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 6.85
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 2.05 AVERAGE FLOW DEPTH(FEET) = 0.03 TRAVEL TIME(MIN.) = 2.10 Tc(MIN.) = 8.28
SUBAREA AREA(ACRES) = 1.95 SUBAREA RUNOFF(CFS) = 5.93
EFFECTIVE AREA(ACRES) = 3.02 AREA-AVERAGED Fm(INCH/HR) = 0.25 AREA-AVERAGED Fp(INCH/HR) = 0.25 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 3.0 PEAK FLOW RATE(CFS) = 9.18
GIVEN CHANNEL BASE(FEET) = 100.00 CHANNEL FREEBOARD(FEET) = 0.0 "Z" FACTOR = 2.500 MANNING'S FACTOR = 0.030
*ESTIMATED CHANNEL HEIGHT(FEET) = 0.04
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 0.04 FLOW VELOCITY(FEET/SEC.) = 2.24
LONGEST FLOWPATH FROM NODE 600.00 TO NODE 605.00 = 500.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 700.00 TO NODE 702.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< ============================================================================ INITIAL SUBAREA FLOW-LENGTH(FEET) = 315.00
ELEVATION DATA: UPSTREAM(FEET) = 742.54 DOWNSTREAM(FEET) = 615.00 Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 6.281
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 4.240
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
NATURAL POOR COVER
"BARREN" C 3.14 0.25 1.000 91 6.28
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
SUBAREA RUNOFF(CFS) = 11.27
TOTAL AREA(ACRES) = 3.14 PEAK FLOW RATE(CFS) = 11.27
**************************************************************************** FLOW PROCESS FROM NODE 702.00 TO NODE 705.00 IS CODE = 56 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 615.00 DOWNSTREAM(FEET) = 450.00 CHANNEL LENGTH THRU SUBAREA(FEET) = 1085.00 CHANNEL SLOPE = 0.1521 GIVEN CHANNEL BASE(FEET) = 10.00 CHANNEL FREEBOARD(FEET) = 0.0 "Z" FACTOR = 2.500 MANNING'S FACTOR = 0.030
*ESTIMATED CHANNEL HEIGHT(FEET) = 0.30
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.561
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" C 8.41 0.25 1.000 91
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 23.85
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 7.98 AVERAGE FLOW DEPTH(FEET) = 0.28 TRAVEL TIME(MIN.) = 2.27 Tc(MIN.) = 8.55
SUBAREA AREA(ACRES) = 8.41 SUBAREA RUNOFF(CFS) = 25.06
EFFECTIVE AREA(ACRES) = 11.55 AREA-AVERAGED Fm(INCH/HR) = 0.25 AREA-AVERAGED Fp(INCH/HR) = 0.25 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 11.6 PEAK FLOW RATE(CFS) = 34.42
GIVEN CHANNEL BASE(FEET) = 10.00 CHANNEL FREEBOARD(FEET) = 0.0 "Z" FACTOR = 2.500 MANNING'S FACTOR = 0.030
*ESTIMATED CHANNEL HEIGHT(FEET) = 0.35
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 0.35 FLOW VELOCITY(FEET/SEC.) = 9.10
LONGEST FLOWPATH FROM NODE 700.00 TO NODE 705.00 = 1400.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 800.00 TO NODE 802.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< ============================================================================ INITIAL SUBAREA FLOW-LENGTH(FEET) = 312.00
ELEVATION DATA: UPSTREAM(FEET) = 874.02 DOWNSTREAM(FEET) = 780.00 Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 6.638
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 4.109
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
NATURAL POOR COVER
"BARREN" C 0.77 0.25 1.000 91 6.64
NATURAL POOR COVER
"BARREN" D 0.77 0.20 1.000 93 6.64
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.23
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
SUBAREA RUNOFF(CFS) = 5.42
TOTAL AREA(ACRES) = 1.55 PEAK FLOW RATE(CFS) = 5.42
**************************************************************************** FLOW PROCESS FROM NODE 802.00 TO NODE 805.00 IS CODE = 56 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 780.00 DOWNSTREAM(FEET) = 621.85 CHANNEL LENGTH THRU SUBAREA(FEET) = 784.00 CHANNEL SLOPE = 0.2017 GIVEN CHANNEL BASE(FEET) = 100.00 CHANNEL FREEBOARD(FEET) = 0.0 "Z" FACTOR = 2.500 MANNING'S FACTOR = 0.030
*ESTIMATED CHANNEL HEIGHT(FEET) = 0.05
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.040
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" C 1.54 0.25 1.000 91
NATURAL POOR COVER
"BARREN" D 3.59 0.20 1.000 93
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.22
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 12.03
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 2.80 AVERAGE FLOW DEPTH(FEET) = 0.04 TRAVEL TIME(MIN.) = 4.67 Tc(MIN.) = 11.31
SUBAREA AREA(ACRES) = 5.13 SUBAREA RUNOFF(CFS) = 13.04
EFFECTIVE AREA(ACRES) = 6.68 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.22 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 6.7 PEAK FLOW RATE(CFS) = 16.97
GIVEN CHANNEL BASE(FEET) = 100.00 CHANNEL FREEBOARD(FEET) = 0.0 "Z" FACTOR = 2.500 MANNING'S FACTOR = 0.030
*ESTIMATED CHANNEL HEIGHT(FEET) = 0.06
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 0.06 FLOW VELOCITY(FEET/SEC.) = 3.01
LONGEST FLOWPATH FROM NODE 800.00 TO NODE 805.00 = 1096.00 FEET. ============================================================================ END OF STUDY SUMMARY:
TOTAL AREA(ACRES) = 6.7 TC(MIN.) = 11.31
EFFECTIVE AREA(ACRES) = 6.68 AREA-AVERAGED Fm(INCH/HR)= 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.22 AREA-AVERAGED Ap = 1.000 PEAK FLOW RATE(CFS) = 16.97
============================================================================ ============================================================================
END OF RATIONAL METHOD ANALYSIS
____________________________________________________________________________ ****************************************************************************
RATIONAL METHOD HYDROLOGY COMPUTER PROGRAM PACKAGE
(Reference: 1986 ORANGE COUNTY HYDROLOGY CRITERION)
(c) Copyright 1983-2014 Advanced Engineering Software (aes) Ver. 21.0 Release Date: 06/01/2014 License ID 1202
Analysis prepared by:
Huitt-Zollars, Inc.
2603 Main Street, Suite 400
Irvine, CA 92614
Tel - 949-988-5815
************************** DESCRIPTION OF STUDY ************************** * GYPSUM CANYON CEMETERY WITH OFFSITE FLOWS *
* EXISTING CONDITION - 100 YEAR STORM EVENT *
* HHTUN REV CGULLIXSON *
************************************************************************** FILE NAME: GC100.DAT
TIME/DATE OF STUDY: 11:02 10/04/2023
============================================================================ USER SPECIFIED HYDROLOGY AND HYDRAULIC MODEL INFORMATION:
============================================================================ --*TIME-OF-CONCENTRATION MODEL*--
USER SPECIFIED STORM EVENT(YEAR) = 100.00
SPECIFIED MINIMUM PIPE SIZE(INCH) = 12.00
SPECIFIED PERCENT OF GRADIENTS(DECIMAL) TO USE FOR FRICTION SLOPE = 0.90 *DATA BANK RAINFALL USED*
*ANTECEDENT MOISTURE CONDITION (AMC) III ASSUMED FOR RATIONAL METHOD* *USER-DEFINED STREET-SECTIONS FOR COUPLED PIPEFLOW AND STREETFLOW MODEL* HALF- CROWN TO STREET-CROSSFALL: CURB GUTTER-GEOMETRIES: MANNING
WIDTH CROSSFALL IN- / OUT-/PARK- HEIGHT WIDTH LIP HIKE FACTOR NO. (FT) (FT) SIDE / SIDE/ WAY (FT) (FT) (FT) (FT) (n)
=== ===== ========= ================= ====== ===== ====== ===== ======= 1 30.0 20.0 0.018/0.018/0.020 0.67 2.00 0.0312 0.167 0.0150 GLOBAL STREET FLOW-DEPTH CONSTRAINTS:
1. Relative Flow-Depth = 0.00 FEET
as (Maximum Allowable Street Flow Depth) - (Top-of-Curb)
2. (Depth)*(Velocity) Constraint = 6.0 (FT*FT/S)
*SIZE PIPE WITH A FLOW CAPACITY GREATER THAN
OR EQUAL TO THE UPSTREAM TRIBUTARY PIPE.*
*USER-SPECIFIED MINIMUM TOPOGRAPHIC SLOPE ADJUSTMENT NOT SELECTED **************************************************************************** FLOW PROCESS FROM NODE 100.00 TO NODE 105.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< ============================================================================ INITIAL SUBAREA FLOW-LENGTH(FEET) = 95.00
ELEVATION DATA: UPSTREAM(FEET) = 453.26 DOWNSTREAM(FEET) = 421.83 Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 5.000
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 6.187
SUBAREA Tc AND LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
NATURAL POOR COVER
"BARREN" C 2.98 0.25 1.000 98 5.00
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
SUBAREA RUNOFF(CFS) = 15.92
TOTAL AREA(ACRES) = 2.98 PEAK FLOW RATE(CFS) = 15.92
**************************************************************************** FLOW PROCESS FROM NODE 200.00 TO NODE 205.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< ============================================================================ INITIAL SUBAREA FLOW-LENGTH(FEET) = 309.00
ELEVATION DATA: UPSTREAM(FEET) = 782.21 DOWNSTREAM(FEET) = 725.00 Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 7.289
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.986
SUBAREA Tc AND LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
NATURAL POOR COVER
"BARREN" C 6.73 0.25 1.000 98 7.29
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
SUBAREA RUNOFF(CFS) = 28.68
TOTAL AREA(ACRES) = 6.73 PEAK FLOW RATE(CFS) = 28.68
**************************************************************************** FLOW PROCESS FROM NODE 205.00 TO NODE 206.00 IS CODE = 56 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 725.00 DOWNSTREAM(FEET) = 675.00 CHANNEL LENGTH THRU SUBAREA(FEET) = 507.00 CHANNEL SLOPE = 0.0986 GIVEN CHANNEL BASE(FEET) = 130.00 CHANNEL FREEBOARD(FEET) = 0.0 "Z" FACTOR = 2.500 MANNING'S FACTOR = 0.030
*ESTIMATED CHANNEL HEIGHT(FEET) = 0.11
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.219
SUBAREA LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" C 9.89 0.25 1.000 98
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 46.39
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 3.43 AVERAGE FLOW DEPTH(FEET) = 0.10 TRAVEL TIME(MIN.) = 2.47 Tc(MIN.) = 9.75
SUBAREA AREA(ACRES) = 9.89 SUBAREA RUNOFF(CFS) = 35.33
EFFECTIVE AREA(ACRES) = 16.62 AREA-AVERAGED Fm(INCH/HR) = 0.25 AREA-AVERAGED Fp(INCH/HR) = 0.25 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 16.6 PEAK FLOW RATE(CFS) = 59.36
GIVEN CHANNEL BASE(FEET) = 130.00 CHANNEL FREEBOARD(FEET) = 0.0 "Z" FACTOR = 2.500 MANNING'S FACTOR = 0.030
*ESTIMATED CHANNEL HEIGHT(FEET) = 0.12
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 0.12 FLOW VELOCITY(FEET/SEC.) = 3.82
LONGEST FLOWPATH FROM NODE 200.00 TO NODE 206.00 = 816.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 206.00 TO NODE 208.00 IS CODE = 56 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 675.00 DOWNSTREAM(FEET) = 625.00 CHANNEL LENGTH THRU SUBAREA(FEET) = 505.00 CHANNEL SLOPE = 0.0990 GIVEN CHANNEL BASE(FEET) = 130.00 CHANNEL FREEBOARD(FEET) = 0.0 "Z" FACTOR = 2.500 MANNING'S FACTOR = 0.030
*ESTIMATED CHANNEL HEIGHT(FEET) = 0.13
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 3.768
SUBAREA LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" C 5.66 0.25 1.000 98
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 68.34
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 3.96 AVERAGE FLOW DEPTH(FEET) = 0.13 TRAVEL TIME(MIN.) = 2.13 Tc(MIN.) = 11.88
SUBAREA AREA(ACRES) = 5.66 SUBAREA RUNOFF(CFS) = 17.92
EFFECTIVE AREA(ACRES) = 22.28 AREA-AVERAGED Fm(INCH/HR) = 0.25 AREA-AVERAGED Fp(INCH/HR) = 0.25 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 22.3 PEAK FLOW RATE(CFS) = 70.54
GIVEN CHANNEL BASE(FEET) = 130.00 CHANNEL FREEBOARD(FEET) = 0.0 "Z" FACTOR = 2.500 MANNING'S FACTOR = 0.030
*ESTIMATED CHANNEL HEIGHT(FEET) = 0.13
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 0.13 FLOW VELOCITY(FEET/SEC.) = 4.08
LONGEST FLOWPATH FROM NODE 200.00 TO NODE 208.00 = 1321.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 208.00 TO NODE 220.00 IS CODE = 56 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 625.00 DOWNSTREAM(FEET) = 570.03 CHANNEL LENGTH THRU SUBAREA(FEET) = 423.00 CHANNEL SLOPE = 0.1300 GIVEN CHANNEL BASE(FEET) = 130.00 CHANNEL FREEBOARD(FEET) = 0.0 "Z" FACTOR = 2.500 MANNING'S FACTOR = 0.030
*ESTIMATED CHANNEL HEIGHT(FEET) = 0.13
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 3.511
SUBAREA LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" C 2.85 0.25 1.000 98
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 74.72
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 4.52 AVERAGE FLOW DEPTH(FEET) = 0.13 TRAVEL TIME(MIN.) = 1.56 Tc(MIN.) = 13.44
SUBAREA AREA(ACRES) = 2.85 SUBAREA RUNOFF(CFS) = 8.36
EFFECTIVE AREA(ACRES) = 25.13 AREA-AVERAGED Fm(INCH/HR) = 0.25 AREA-AVERAGED Fp(INCH/HR) = 0.25 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 25.1 PEAK FLOW RATE(CFS) = 73.75
GIVEN CHANNEL BASE(FEET) = 130.00 CHANNEL FREEBOARD(FEET) = 0.0 "Z" FACTOR = 2.500 MANNING'S FACTOR = 0.030
*ESTIMATED CHANNEL HEIGHT(FEET) = 0.13
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 0.13 FLOW VELOCITY(FEET/SEC.) = 4.46
LONGEST FLOWPATH FROM NODE 200.00 TO NODE 220.00 = 1744.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 220.00 TO NODE 220.00 IS CODE = 10 ---------------------------------------------------------------------------- >>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 1 <<<<< ============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 210.00 TO NODE 212.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< ============================================================================ INITIAL SUBAREA FLOW-LENGTH(FEET) = 307.00
ELEVATION DATA: UPSTREAM(FEET) = 852.98 DOWNSTREAM(FEET) = 785.00 Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 7.014
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 5.096
SUBAREA Tc AND LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
NATURAL POOR COVER
"BARREN" C 1.37 0.25 1.000 98 7.01
NATURAL POOR COVER
"BARREN" D 0.03 0.20 1.000 98 7.01
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
SUBAREA RUNOFF(CFS) = 6.11
TOTAL AREA(ACRES) = 1.40 PEAK FLOW RATE(CFS) = 6.11
**************************************************************************** FLOW PROCESS FROM NODE 212.00 TO NODE 213.00 IS CODE = 56 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 785.00 DOWNSTREAM(FEET) = 710.00 CHANNEL LENGTH THRU SUBAREA(FEET) = 460.00 CHANNEL SLOPE = 0.1630 GIVEN CHANNEL BASE(FEET) = 130.00 CHANNEL FREEBOARD(FEET) = 0.0 "Z" FACTOR = 2.500 MANNING'S FACTOR = 0.030
*ESTIMATED CHANNEL HEIGHT(FEET) = 0.04
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.054
SUBAREA LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" C 3.29 0.25 1.000 98
NATURAL POOR COVER
"BARREN" D 0.03 0.20 1.000 98
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 11.87
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 2.23 AVERAGE FLOW DEPTH(FEET) = 0.04 TRAVEL TIME(MIN.) = 3.45 Tc(MIN.) = 10.46
SUBAREA AREA(ACRES) = 3.32 SUBAREA RUNOFF(CFS) = 11.37
EFFECTIVE AREA(ACRES) = 4.72 AREA-AVERAGED Fm(INCH/HR) = 0.25 AREA-AVERAGED Fp(INCH/HR) = 0.25 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 4.7 PEAK FLOW RATE(CFS) = 16.16
GIVEN CHANNEL BASE(FEET) = 130.00 CHANNEL FREEBOARD(FEET) = 0.0 "Z" FACTOR = 2.500 MANNING'S FACTOR = 0.030
*ESTIMATED CHANNEL HEIGHT(FEET) = 0.05
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 0.05 FLOW VELOCITY(FEET/SEC.) = 2.55
LONGEST FLOWPATH FROM NODE 210.00 TO NODE 213.00 = 767.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 213.00 TO NODE 214.00 IS CODE = 56 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 710.00 DOWNSTREAM(FEET) = 630.00 CHANNEL LENGTH THRU SUBAREA(FEET) = 400.00 CHANNEL SLOPE = 0.2000 GIVEN CHANNEL BASE(FEET) = 130.00 CHANNEL FREEBOARD(FEET) = 0.0 "Z" FACTOR = 2.500 MANNING'S FACTOR = 0.030
*ESTIMATED CHANNEL HEIGHT(FEET) = 0.06
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 3.636
SUBAREA LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" C 4.05 0.25 1.000 98
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 22.35
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 3.05 AVERAGE FLOW DEPTH(FEET) = 0.06 TRAVEL TIME(MIN.) = 2.18 Tc(MIN.) = 12.64
SUBAREA AREA(ACRES) = 4.05 SUBAREA RUNOFF(CFS) = 12.34
EFFECTIVE AREA(ACRES) = 8.77 AREA-AVERAGED Fm(INCH/HR) = 0.25 AREA-AVERAGED Fp(INCH/HR) = 0.25 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 8.8 PEAK FLOW RATE(CFS) = 26.73
GIVEN CHANNEL BASE(FEET) = 130.00 CHANNEL FREEBOARD(FEET) = 0.0 "Z" FACTOR = 2.500 MANNING'S FACTOR = 0.030
*ESTIMATED CHANNEL HEIGHT(FEET) = 0.06
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 0.06 FLOW VELOCITY(FEET/SEC.) = 3.53
LONGEST FLOWPATH FROM NODE 210.00 TO NODE 214.00 = 1167.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 214.00 TO NODE 220.00 IS CODE = 56 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 630.00 DOWNSTREAM(FEET) = 570.03 CHANNEL LENGTH THRU SUBAREA(FEET) = 461.00 CHANNEL SLOPE = 0.1301 GIVEN CHANNEL BASE(FEET) = 10.00 CHANNEL FREEBOARD(FEET) = 0.0 "Z" FACTOR = 2.500 MANNING'S FACTOR = 0.030
*ESTIMATED CHANNEL HEIGHT(FEET) = 0.33
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 3.487
SUBAREA LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" C 0.97 0.25 1.000 98
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 28.14
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 8.00 AVERAGE FLOW DEPTH(FEET) = 0.33 TRAVEL TIME(MIN.) = 0.96 Tc(MIN.) = 13.60
SUBAREA AREA(ACRES) = 0.97 SUBAREA RUNOFF(CFS) = 2.83
EFFECTIVE AREA(ACRES) = 9.74 AREA-AVERAGED Fm(INCH/HR) = 0.25 AREA-AVERAGED Fp(INCH/HR) = 0.25 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 9.7 PEAK FLOW RATE(CFS) = 28.38
GIVEN CHANNEL BASE(FEET) = 10.00 CHANNEL FREEBOARD(FEET) = 0.0 "Z" FACTOR = 2.500 MANNING'S FACTOR = 0.030
*ESTIMATED CHANNEL HEIGHT(FEET) = 0.33
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 0.33 FLOW VELOCITY(FEET/SEC.) = 8.07
LONGEST FLOWPATH FROM NODE 210.00 TO NODE 220.00 = 1628.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 220.00 TO NODE 220.00 IS CODE = 10 ---------------------------------------------------------------------------- >>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 2 <<<<< ============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 215.00 TO NODE 217.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< ============================================================================ INITIAL SUBAREA FLOW-LENGTH(FEET) = 312.00
ELEVATION DATA: UPSTREAM(FEET) = 746.57 DOWNSTREAM(FEET) = 684.98 Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 7.224
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 5.011
SUBAREA Tc AND LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
NATURAL POOR COVER
"BARREN" C 1.68 0.25 1.000 98 7.22
NATURAL POOR COVER
"BARREN" D 0.31 0.20 1.000 98 7.22
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.24
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
SUBAREA RUNOFF(CFS) = 8.54
TOTAL AREA(ACRES) = 1.99 PEAK FLOW RATE(CFS) = 8.54
**************************************************************************** FLOW PROCESS FROM NODE 217.00 TO NODE 220.00 IS CODE = 56 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 684.96 DOWNSTREAM(FEET) = 570.03 CHANNEL LENGTH THRU SUBAREA(FEET) = 729.00 CHANNEL SLOPE = 0.1577 GIVEN CHANNEL BASE(FEET) = 130.00 CHANNEL FREEBOARD(FEET) = 0.0 "Z" FACTOR = 2.500 MANNING'S FACTOR = 0.030
*ESTIMATED CHANNEL HEIGHT(FEET) = 0.06
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 3.842
SUBAREA LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" C 6.29 0.25 1.000 98
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 18.76
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 2.85 AVERAGE FLOW DEPTH(FEET) = 0.05 TRAVEL TIME(MIN.) = 4.26 Tc(MIN.) = 11.48
SUBAREA AREA(ACRES) = 6.29 SUBAREA RUNOFF(CFS) = 20.34
EFFECTIVE AREA(ACRES) = 8.28 AREA-AVERAGED Fm(INCH/HR) = 0.25 AREA-AVERAGED Fp(INCH/HR) = 0.25 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 8.3 PEAK FLOW RATE(CFS) = 26.78
GIVEN CHANNEL BASE(FEET) = 130.00 CHANNEL FREEBOARD(FEET) = 0.0 "Z" FACTOR = 2.500 MANNING'S FACTOR = 0.030
*ESTIMATED CHANNEL HEIGHT(FEET) = 0.07
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 0.07 FLOW VELOCITY(FEET/SEC.) = 3.13
LONGEST FLOWPATH FROM NODE 215.00 TO NODE 220.00 = 1041.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 220.00 TO NODE 220.00 IS CODE = 11 ---------------------------------------------------------------------------- >>>>>CONFLUENCE MEMORY BANK # 1 WITH THE MAIN-STREAM MEMORY<<<<< ============================================================================ ** MAIN STREAM CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 26.78 11.48 3.842 0.25( 0.25) 1.00 8.3 215.00
LONGEST FLOWPATH FROM NODE 215.00 TO NODE 220.00 = 1041.00 FEET. ** MEMORY BANK # 1 CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 73.75 13.44 3.511 0.25( 0.25) 1.00 25.1 200.00
LONGEST FLOWPATH FROM NODE 200.00 TO NODE 220.00 = 1744.00 FEET. ** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 96.19 11.48 3.842 0.25( 0.25) 1.00 29.7 215.00
2 98.06 13.44 3.511 0.25( 0.25) 1.00 33.4 200.00
TOTAL AREA(ACRES) = 33.4
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 98.06 Tc(MIN.) = 13.442
EFFECTIVE AREA(ACRES) = 33.41 AREA-AVERAGED Fm(INCH/HR) = 0.25 AREA-AVERAGED Fp(INCH/HR) = 0.25 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 33.4
LONGEST FLOWPATH FROM NODE 200.00 TO NODE 220.00 = 1744.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 220.00 TO NODE 220.00 IS CODE = 11 ---------------------------------------------------------------------------- >>>>>CONFLUENCE MEMORY BANK # 2 WITH THE MAIN-STREAM MEMORY<<<<< ============================================================================ ** MAIN STREAM CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 96.19 11.48 3.842 0.25( 0.25) 1.00 29.7 215.00
2 98.06 13.44 3.511 0.25( 0.25) 1.00 33.4 200.00
LONGEST FLOWPATH FROM NODE 200.00 TO NODE 220.00 = 1744.00 FEET. ** MEMORY BANK # 2 CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 28.38 13.60 3.487 0.25( 0.25) 1.00 9.7 210.00
LONGEST FLOWPATH FROM NODE 210.00 TO NODE 220.00 = 1628.00 FEET. ** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 122.78 11.48 3.842 0.25( 0.25) 1.00 38.0 215.00
2 126.31 13.44 3.511 0.25( 0.25) 1.00 43.0 200.00
3 125.72 13.60 3.487 0.25( 0.25) 1.00 43.2 210.00
TOTAL AREA(ACRES) = 43.2
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 126.31 Tc(MIN.) = 13.442
EFFECTIVE AREA(ACRES) = 43.03 AREA-AVERAGED Fm(INCH/HR) = 0.25 AREA-AVERAGED Fp(INCH/HR) = 0.25 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 43.2
LONGEST FLOWPATH FROM NODE 200.00 TO NODE 220.00 = 1744.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 220.00 TO NODE 220.00 IS CODE = 12 ---------------------------------------------------------------------------- >>>>>CLEAR MEMORY BANK # 1 <<<<<
============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 220.00 TO NODE 220.00 IS CODE = 12 ---------------------------------------------------------------------------- >>>>>CLEAR MEMORY BANK # 2 <<<<<
============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 220.00 TO NODE 225.00 IS CODE = 56 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 570.03 DOWNSTREAM(FEET) = 558.97 CHANNEL LENGTH THRU SUBAREA(FEET) = 430.00 CHANNEL SLOPE = 0.0257 GIVEN CHANNEL BASE(FEET) = 130.00 CHANNEL FREEBOARD(FEET) = 0.0 "Z" FACTOR = 2.500 MANNING'S FACTOR = 0.030
*ESTIMATED CHANNEL HEIGHT(FEET) = 0.29
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 3.234
SUBAREA LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" C 2.84 0.25 1.000 98
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 130.12 TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 3.47 AVERAGE FLOW DEPTH(FEET) = 0.29 TRAVEL TIME(MIN.) = 2.07 Tc(MIN.) = 15.51
SUBAREA AREA(ACRES) = 2.84 SUBAREA RUNOFF(CFS) = 7.63
EFFECTIVE AREA(ACRES) = 45.87 AREA-AVERAGED Fm(INCH/HR) = 0.25 AREA-AVERAGED Fp(INCH/HR) = 0.25 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 46.0 PEAK FLOW RATE(CFS) = 126.31
NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE
GIVEN CHANNEL BASE(FEET) = 130.00 CHANNEL FREEBOARD(FEET) = 0.0 "Z" FACTOR = 2.500 MANNING'S FACTOR = 0.030
*ESTIMATED CHANNEL HEIGHT(FEET) = 0.29
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 0.29 FLOW VELOCITY(FEET/SEC.) = 3.39
LONGEST FLOWPATH FROM NODE 200.00 TO NODE 225.00 = 2174.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 225.00 TO NODE 230.00 IS CODE = 56 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 558.97 DOWNSTREAM(FEET) = 440.00 CHANNEL LENGTH THRU SUBAREA(FEET) = 1050.00 CHANNEL SLOPE = 0.1133 GIVEN CHANNEL BASE(FEET) = 130.00 CHANNEL FREEBOARD(FEET) = 0.0 "Z" FACTOR = 2.500 MANNING'S FACTOR = 0.030
*ESTIMATED CHANNEL HEIGHT(FEET) = 0.20
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 2.910
SUBAREA LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" C 12.00 0.25 1.000 98
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 140.68 TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 5.57 AVERAGE FLOW DEPTH(FEET) = 0.19 TRAVEL TIME(MIN.) = 3.14 Tc(MIN.) = 18.65
SUBAREA AREA(ACRES) = 12.00 SUBAREA RUNOFF(CFS) = 28.73 EFFECTIVE AREA(ACRES) = 57.87 AREA-AVERAGED Fm(INCH/HR) = 0.25 AREA-AVERAGED Fp(INCH/HR) = 0.25 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 58.0 PEAK FLOW RATE(CFS) = 138.57
GIVEN CHANNEL BASE(FEET) = 130.00 CHANNEL FREEBOARD(FEET) = 0.0 "Z" FACTOR = 2.500 MANNING'S FACTOR = 0.030
*ESTIMATED CHANNEL HEIGHT(FEET) = 0.19
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 0.19 FLOW VELOCITY(FEET/SEC.) = 5.49
LONGEST FLOWPATH FROM NODE 200.00 TO NODE 230.00 = 3224.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 230.00 TO NODE 240.00 IS CODE = 56 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 440.00 DOWNSTREAM(FEET) = 428.01 CHANNEL LENGTH THRU SUBAREA(FEET) = 542.00 CHANNEL SLOPE = 0.0221 GIVEN CHANNEL BASE(FEET) = 130.00 CHANNEL FREEBOARD(FEET) = 0.0 "Z" FACTOR = 2.500 MANNING'S FACTOR = 0.030
*ESTIMATED CHANNEL HEIGHT(FEET) = 0.32
CHANNEL FLOW THRU SUBAREA(CFS) = 138.57
FLOW VELOCITY(FEET/SEC.) = 3.36 FLOW DEPTH(FEET) = 0.32 TRAVEL TIME(MIN.) = 2.69 Tc(MIN.) = 21.34
LONGEST FLOWPATH FROM NODE 200.00 TO NODE 240.00 = 3766.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 240.00 TO NODE 240.00 IS CODE = 10 ---------------------------------------------------------------------------- >>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 1 <<<<< ============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 235.00 TO NODE 237.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< ============================================================================ INITIAL SUBAREA FLOW-LENGTH(FEET) = 328.00
ELEVATION DATA: UPSTREAM(FEET) = 661.67 DOWNSTREAM(FEET) = 570.00 Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 6.874
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 5.156
SUBAREA Tc AND LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
NATURAL POOR COVER
"BARREN" C 5.71 0.25 1.000 98 6.87
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
SUBAREA RUNOFF(CFS) = 25.21
TOTAL AREA(ACRES) = 5.71 PEAK FLOW RATE(CFS) = 25.21
**************************************************************************** FLOW PROCESS FROM NODE 237.00 TO NODE 240.00 IS CODE = 56 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 570.00 DOWNSTREAM(FEET) = 428.01 CHANNEL LENGTH THRU SUBAREA(FEET) = 1040.00 CHANNEL SLOPE = 0.1365 GIVEN CHANNEL BASE(FEET) = 130.00 CHANNEL FREEBOARD(FEET) = 0.0 "Z" FACTOR = 2.500 MANNING'S FACTOR = 0.030
*ESTIMATED CHANNEL HEIGHT(FEET) = 0.12
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 3.940
SUBAREA LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" C 18.98 0.25 1.000 98
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 57.03
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 4.21 AVERAGE FLOW DEPTH(FEET) = 0.10 TRAVEL TIME(MIN.) = 4.12 Tc(MIN.) = 10.99
SUBAREA AREA(ACRES) = 18.98 SUBAREA RUNOFF(CFS) = 63.04 EFFECTIVE AREA(ACRES) = 24.69 AREA-AVERAGED Fm(INCH/HR) = 0.25 AREA-AVERAGED Fp(INCH/HR) = 0.25 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 24.7 PEAK FLOW RATE(CFS) = 82.00
GIVEN CHANNEL BASE(FEET) = 130.00 CHANNEL FREEBOARD(FEET) = 0.0 "Z" FACTOR = 2.500 MANNING'S FACTOR = 0.030
*ESTIMATED CHANNEL HEIGHT(FEET) = 0.13
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 0.13 FLOW VELOCITY(FEET/SEC.) = 4.75
LONGEST FLOWPATH FROM NODE 235.00 TO NODE 240.00 = 1368.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 240.00 TO NODE 240.00 IS CODE = 11 ---------------------------------------------------------------------------- >>>>>CONFLUENCE MEMORY BANK # 1 WITH THE MAIN-STREAM MEMORY<<<<< ============================================================================ ** MAIN STREAM CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 82.00 10.99 3.940 0.25( 0.25) 1.00 24.7 235.00
LONGEST FLOWPATH FROM NODE 235.00 TO NODE 240.00 = 1368.00 FEET. ** MEMORY BANK # 1 CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 135.04 19.48 2.838 0.25( 0.25) 1.00 52.8 215.00
2 138.57 21.34 2.694 0.25( 0.25) 1.00 57.9 200.00
3 137.98 21.49 2.683 0.25( 0.25) 1.00 58.0 210.00
LONGEST FLOWPATH FROM NODE 200.00 TO NODE 240.00 = 3766.00 FEET. ** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 190.61 10.99 3.940 0.25( 0.25) 1.00 54.5 235.00
2 192.55 19.48 2.838 0.25( 0.25) 1.00 77.5 215.00
3 192.87 21.34 2.694 0.25( 0.25) 1.00 82.6 200.00
4 192.05 21.49 2.683 0.25( 0.25) 1.00 82.7 210.00
TOTAL AREA(ACRES) = 82.7
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 192.87 Tc(MIN.) = 21.343
EFFECTIVE AREA(ACRES) = 82.56 AREA-AVERAGED Fm(INCH/HR) = 0.25 AREA-AVERAGED Fp(INCH/HR) = 0.25 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 82.7
LONGEST FLOWPATH FROM NODE 200.00 TO NODE 240.00 = 3766.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 240.00 TO NODE 240.00 IS CODE = 12 ---------------------------------------------------------------------------- >>>>>CLEAR MEMORY BANK # 1 <<<<<
============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 240.00 TO NODE 242.00 IS CODE = 56 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 428.01 DOWNSTREAM(FEET) = 426.79 CHANNEL LENGTH THRU SUBAREA(FEET) = 379.00 CHANNEL SLOPE = 0.0032 GIVEN CHANNEL BASE(FEET) = 100.00 CHANNEL FREEBOARD(FEET) = 0.0 "Z" FACTOR = 2.500 MANNING'S FACTOR = 0.030
*ESTIMATED CHANNEL HEIGHT(FEET) = 0.81
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 2.520
SUBAREA LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" C 3.92 0.25 1.000 98
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 196.87 TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 2.39 AVERAGE FLOW DEPTH(FEET) = 0.81 TRAVEL TIME(MIN.) = 2.64 Tc(MIN.) = 23.98
SUBAREA AREA(ACRES) = 3.92 SUBAREA RUNOFF(CFS) = 8.01
EFFECTIVE AREA(ACRES) = 86.48 AREA-AVERAGED Fm(INCH/HR) = 0.25 AREA-AVERAGED Fp(INCH/HR) = 0.25 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 86.6 PEAK FLOW RATE(CFS) = 192.87
NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE
GIVEN CHANNEL BASE(FEET) = 100.00 CHANNEL FREEBOARD(FEET) = 0.0 "Z" FACTOR = 2.500 MANNING'S FACTOR = 0.030
*ESTIMATED CHANNEL HEIGHT(FEET) = 0.80
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 0.80 FLOW VELOCITY(FEET/SEC.) = 2.37
LONGEST FLOWPATH FROM NODE 200.00 TO NODE 242.00 = 4145.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 242.00 TO NODE 244.00 IS CODE = 56 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 426.79 DOWNSTREAM(FEET) = 424.68 CHANNEL LENGTH THRU SUBAREA(FEET) = 476.00 CHANNEL SLOPE = 0.0044 GIVEN CHANNEL BASE(FEET) = 100.00 CHANNEL FREEBOARD(FEET) = 0.0 "Z" FACTOR = 2.500 MANNING'S FACTOR = 0.030
*ESTIMATED CHANNEL HEIGHT(FEET) = 0.74
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 2.355
SUBAREA LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" C 5.43 0.25 1.000 98
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 198.01 TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 2.64 AVERAGE FLOW DEPTH(FEET) = 0.74 TRAVEL TIME(MIN.) = 3.00 Tc(MIN.) = 26.98
SUBAREA AREA(ACRES) = 5.43 SUBAREA RUNOFF(CFS) = 10.29
EFFECTIVE AREA(ACRES) = 91.91 AREA-AVERAGED Fm(INCH/HR) = 0.25 AREA-AVERAGED Fp(INCH/HR) = 0.25 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 92.0 PEAK FLOW RATE(CFS) = 192.87
NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE
GIVEN CHANNEL BASE(FEET) = 100.00 CHANNEL FREEBOARD(FEET) = 0.0 "Z" FACTOR = 2.500 MANNING'S FACTOR = 0.030
*ESTIMATED CHANNEL HEIGHT(FEET) = 0.72
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 0.72 FLOW VELOCITY(FEET/SEC.) = 2.62
LONGEST FLOWPATH FROM NODE 200.00 TO NODE 244.00 = 4621.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 244.00 TO NODE 245.00 IS CODE = 56 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 424.68 DOWNSTREAM(FEET) = 423.93 CHANNEL LENGTH THRU SUBAREA(FEET) = 337.00 CHANNEL SLOPE = 0.0022 GIVEN CHANNEL BASE(FEET) = 100.00 CHANNEL FREEBOARD(FEET) = 0.0 "Z" FACTOR = 2.500 MANNING'S FACTOR = 0.030
*ESTIMATED CHANNEL HEIGHT(FEET) = 0.91
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 2.234
SUBAREA LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" C 3.78 0.25 1.000 98
NATURAL POOR COVER
"BARREN" D 2.33 0.20 1.000 98
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.23
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 198.38 TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 2.15 AVERAGE FLOW DEPTH(FEET) = 0.90 TRAVEL TIME(MIN.) = 2.61 Tc(MIN.) = 29.60
SUBAREA AREA(ACRES) = 6.11 SUBAREA RUNOFF(CFS) = 11.01
EFFECTIVE AREA(ACRES) = 98.02 AREA-AVERAGED Fm(INCH/HR) = 0.25 AREA-AVERAGED Fp(INCH/HR) = 0.25 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 98.1 PEAK FLOW RATE(CFS) = 192.87
NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE
GIVEN CHANNEL BASE(FEET) = 100.00 CHANNEL FREEBOARD(FEET) = 0.0 "Z" FACTOR = 2.500 MANNING'S FACTOR = 0.030
*ESTIMATED CHANNEL HEIGHT(FEET) = 0.89
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 0.89 FLOW VELOCITY(FEET/SEC.) = 2.13
LONGEST FLOWPATH FROM NODE 200.00 TO NODE 245.00 = 4958.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 245.00 TO NODE 245.00 IS CODE = 10 ---------------------------------------------------------------------------- >>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 1 <<<<< ============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 250.00 TO NODE 252.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< ============================================================================ INITIAL SUBAREA FLOW-LENGTH(FEET) = 283.00
ELEVATION DATA: UPSTREAM(FEET) = 705.45 DOWNSTREAM(FEET) = 644.54 Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 6.828
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 5.176
SUBAREA Tc AND LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
NATURAL POOR COVER
"BARREN" C 2.80 0.25 1.000 98 6.83
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
SUBAREA RUNOFF(CFS) = 12.41
TOTAL AREA(ACRES) = 2.80 PEAK FLOW RATE(CFS) = 12.41
**************************************************************************** FLOW PROCESS FROM NODE 252.00 TO NODE 255.00 IS CODE = 56 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 644.54 DOWNSTREAM(FEET) = 566.00 CHANNEL LENGTH THRU SUBAREA(FEET) = 464.00 CHANNEL SLOPE = 0.1693 GIVEN CHANNEL BASE(FEET) = 100.00 CHANNEL FREEBOARD(FEET) = 0.0 "Z" FACTOR = 2.500 MANNING'S FACTOR = 0.030
*ESTIMATED CHANNEL HEIGHT(FEET) = 0.07
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.407
SUBAREA LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" C 6.71 0.25 1.000 98
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 25.07
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 3.50 AVERAGE FLOW DEPTH(FEET) = 0.07 TRAVEL TIME(MIN.) = 2.21 Tc(MIN.) = 9.04
SUBAREA AREA(ACRES) = 6.71 SUBAREA RUNOFF(CFS) = 25.11
EFFECTIVE AREA(ACRES) = 9.51 AREA-AVERAGED Fm(INCH/HR) = 0.25 AREA-AVERAGED Fp(INCH/HR) = 0.25 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 9.5 PEAK FLOW RATE(CFS) = 35.58
GIVEN CHANNEL BASE(FEET) = 100.00 CHANNEL FREEBOARD(FEET) = 0.0 "Z" FACTOR = 2.500 MANNING'S FACTOR = 0.030
*ESTIMATED CHANNEL HEIGHT(FEET) = 0.09
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 0.09 FLOW VELOCITY(FEET/SEC.) = 4.00
LONGEST FLOWPATH FROM NODE 250.00 TO NODE 255.00 = 747.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 255.00 TO NODE 256.00 IS CODE = 56 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 566.00 DOWNSTREAM(FEET) = 495.00 CHANNEL LENGTH THRU SUBAREA(FEET) = 428.00 CHANNEL SLOPE = 0.1659 GIVEN CHANNEL BASE(FEET) = 100.00 CHANNEL FREEBOARD(FEET) = 0.0 "Z" FACTOR = 2.500 MANNING'S FACTOR = 0.030
*ESTIMATED CHANNEL HEIGHT(FEET) = 0.11
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.033
SUBAREA LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" C 8.88 0.25 1.000 98
NATURAL POOR COVER
"BARREN" D 1.18 0.20 1.000 98
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.24
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 52.78
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 4.72 AVERAGE FLOW DEPTH(FEET) = 0.11 TRAVEL TIME(MIN.) = 1.51 Tc(MIN.) = 10.55
SUBAREA AREA(ACRES) = 10.06 SUBAREA RUNOFF(CFS) = 34.31 EFFECTIVE AREA(ACRES) = 19.57 AREA-AVERAGED Fm(INCH/HR) = 0.25 AREA-AVERAGED Fp(INCH/HR) = 0.25 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 19.6 PEAK FLOW RATE(CFS) = 66.69
GIVEN CHANNEL BASE(FEET) = 100.00 CHANNEL FREEBOARD(FEET) = 0.0 "Z" FACTOR = 2.500 MANNING'S FACTOR = 0.030
*ESTIMATED CHANNEL HEIGHT(FEET) = 0.13
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 0.13 FLOW VELOCITY(FEET/SEC.) = 5.24
LONGEST FLOWPATH FROM NODE 250.00 TO NODE 256.00 = 1175.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 256.00 TO NODE 245.00 IS CODE = 56 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 495.00 DOWNSTREAM(FEET) = 423.93 CHANNEL LENGTH THRU SUBAREA(FEET) = 1078.00 CHANNEL SLOPE = 0.0659 GIVEN CHANNEL BASE(FEET) = 100.00 CHANNEL FREEBOARD(FEET) = 0.0 "Z" FACTOR = 2.500 MANNING'S FACTOR = 0.030
*ESTIMATED CHANNEL HEIGHT(FEET) = 0.22
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 3.356
SUBAREA LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" C 8.19 0.25 1.000 98
NATURAL POOR COVER
"BARREN" D 13.80 0.20 1.000 98
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.22
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 97.87
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 4.50 AVERAGE FLOW DEPTH(FEET) = 0.22 TRAVEL TIME(MIN.) = 4.00 Tc(MIN.) = 14.55
SUBAREA AREA(ACRES) = 21.99 SUBAREA RUNOFF(CFS) = 62.08 EFFECTIVE AREA(ACRES) = 41.56 AREA-AVERAGED Fm(INCH/HR) = 0.23 AREA-AVERAGED Fp(INCH/HR) = 0.23 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 41.6 PEAK FLOW RATE(CFS) = 116.83
GIVEN CHANNEL BASE(FEET) = 100.00 CHANNEL FREEBOARD(FEET) = 0.0 "Z" FACTOR = 2.500 MANNING'S FACTOR = 0.030
*ESTIMATED CHANNEL HEIGHT(FEET) = 0.24
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 0.24 FLOW VELOCITY(FEET/SEC.) = 4.85
LONGEST FLOWPATH FROM NODE 250.00 TO NODE 245.00 = 2253.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 245.00 TO NODE 245.00 IS CODE = 11 ---------------------------------------------------------------------------- >>>>>CONFLUENCE MEMORY BANK # 1 WITH THE MAIN-STREAM MEMORY<<<<< ============================================================================ ** MAIN STREAM CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 116.83 14.55 3.356 0.23( 0.23) 1.00 41.6 250.00
LONGEST FLOWPATH FROM NODE 250.00 TO NODE 245.00 = 2253.00 FEET. ** MEMORY BANK # 1 CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 190.61 19.26 2.857 0.25( 0.25) 1.00 69.9 235.00
2 192.55 27.74 2.318 0.25( 0.25) 1.00 93.0 215.00
3 192.87 29.60 2.234 0.25( 0.25) 1.00 98.0 200.00
4 192.05 29.77 2.226 0.25( 0.25) 1.00 98.1 210.00
LONGEST FLOWPATH FROM NODE 200.00 TO NODE 245.00 = 4958.00 FEET. ** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 288.31 14.55 3.356 0.24( 0.24) 1.00 94.4 250.00
2 288.80 19.26 2.857 0.24( 0.24) 1.00 111.5 235.00
3 270.58 27.74 2.318 0.24( 0.24) 1.00 134.5 215.00
4 267.74 29.60 2.234 0.24( 0.24) 1.00 139.6 200.00
5 266.63 29.77 2.226 0.24( 0.24) 1.00 139.7 210.00
TOTAL AREA(ACRES) = 139.7
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 288.80 Tc(MIN.) = 19.257
EFFECTIVE AREA(ACRES) = 111.50 AREA-AVERAGED Fm(INCH/HR) = 0.24 AREA-AVERAGED Fp(INCH/HR) = 0.24 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 139.7
LONGEST FLOWPATH FROM NODE 200.00 TO NODE 245.00 = 4958.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 245.00 TO NODE 245.00 IS CODE = 12 ---------------------------------------------------------------------------- >>>>>CLEAR MEMORY BANK # 1 <<<<<
============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 245.00 TO NODE 260.00 IS CODE = 56 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 423.93 DOWNSTREAM(FEET) = 400.00 CHANNEL LENGTH THRU SUBAREA(FEET) = 709.00 CHANNEL SLOPE = 0.0338 GIVEN CHANNEL BASE(FEET) = 100.00 CHANNEL FREEBOARD(FEET) = 0.0 "Z" FACTOR = 2.500 MANNING'S FACTOR = 0.030
*ESTIMATED CHANNEL HEIGHT(FEET) = 0.50
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 2.695
SUBAREA LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" D 1.52 0.20 1.000 98
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.20
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 290.50 TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 5.73 AVERAGE FLOW DEPTH(FEET) = 0.50 TRAVEL TIME(MIN.) = 2.06 Tc(MIN.) = 21.32
SUBAREA AREA(ACRES) = 1.52 SUBAREA RUNOFF(CFS) = 3.41
EFFECTIVE AREA(ACRES) = 113.02 AREA-AVERAGED Fm(INCH/HR) = 0.24 AREA-AVERAGED Fp(INCH/HR) = 0.24 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 141.2 PEAK FLOW RATE(CFS) = 288.80
NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE
GIVEN CHANNEL BASE(FEET) = 100.00 CHANNEL FREEBOARD(FEET) = 0.0 "Z" FACTOR = 2.500 MANNING'S FACTOR = 0.030
*ESTIMATED CHANNEL HEIGHT(FEET) = 0.50
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 0.50 FLOW VELOCITY(FEET/SEC.) = 5.70
LONGEST FLOWPATH FROM NODE 200.00 TO NODE 260.00 = 5667.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 260.00 TO NODE 260.00 IS CODE = 10 ---------------------------------------------------------------------------- >>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 3 <<<<< ============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 265.00 TO NODE 267.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< ============================================================================ INITIAL SUBAREA FLOW-LENGTH(FEET) = 283.00
ELEVATION DATA: UPSTREAM(FEET) = 492.93 DOWNSTREAM(FEET) = 475.00 Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 8.720
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.499
SUBAREA Tc AND LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
NATURAL POOR COVER
"BARREN" D 1.00 0.20 1.000 98 8.72
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.20
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
SUBAREA RUNOFF(CFS) = 3.87
TOTAL AREA(ACRES) = 1.00 PEAK FLOW RATE(CFS) = 3.87
**************************************************************************** FLOW PROCESS FROM NODE 267.00 TO NODE 270.00 IS CODE = 56 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 475.00 DOWNSTREAM(FEET) = 406.00 CHANNEL LENGTH THRU SUBAREA(FEET) = 577.00 CHANNEL SLOPE = 0.1196 GIVEN CHANNEL BASE(FEET) = 10.00 CHANNEL FREEBOARD(FEET) = 0.0 "Z" FACTOR = 2.500 MANNING'S FACTOR = 0.030
*ESTIMATED CHANNEL HEIGHT(FEET) = 0.28
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.125
SUBAREA LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" A 0.35 0.40 1.000 93
NATURAL POOR COVER
"BARREN" B 0.21 0.30 1.000 97
NATURAL POOR COVER
"BARREN" C 0.55 0.25 1.000 98
NATURAL POOR COVER
"BARREN" D 7.47 0.20 1.000 98
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.21
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 19.00
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 6.75 AVERAGE FLOW DEPTH(FEET) = 0.26 TRAVEL TIME(MIN.) = 1.43 Tc(MIN.) = 10.15
SUBAREA AREA(ACRES) = 8.58 SUBAREA RUNOFF(CFS) = 30.20
EFFECTIVE AREA(ACRES) = 9.58 AREA-AVERAGED Fm(INCH/HR) = 0.21 AREA-AVERAGED Fp(INCH/HR) = 0.21 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 9.6 PEAK FLOW RATE(CFS) = 33.73
GIVEN CHANNEL BASE(FEET) = 10.00 CHANNEL FREEBOARD(FEET) = 0.0 "Z" FACTOR = 2.500 MANNING'S FACTOR = 0.030
*ESTIMATED CHANNEL HEIGHT(FEET) = 0.37
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 0.37 FLOW VELOCITY(FEET/SEC.) = 8.32
LONGEST FLOWPATH FROM NODE 265.00 TO NODE 270.00 = 860.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 270.00 TO NODE 270.00 IS CODE = 10 ---------------------------------------------------------------------------- >>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 2 <<<<< ============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 300.00 TO NODE 302.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< ============================================================================ INITIAL SUBAREA FLOW-LENGTH(FEET) = 311.00
ELEVATION DATA: UPSTREAM(FEET) = 645.43 DOWNSTREAM(FEET) = 625.00 Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 8.990
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.421
SUBAREA Tc AND LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
NATURAL POOR COVER
"BARREN" C 1.55 0.25 1.000 98 8.99
NATURAL POOR COVER
"BARREN" D 0.17 0.20 1.000 98 8.99
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
SUBAREA RUNOFF(CFS) = 6.46
TOTAL AREA(ACRES) = 1.72 PEAK FLOW RATE(CFS) = 6.46
**************************************************************************** FLOW PROCESS FROM NODE 302.00 TO NODE 305.00 IS CODE = 56 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 625.00 DOWNSTREAM(FEET) = 508.97 CHANNEL LENGTH THRU SUBAREA(FEET) = 858.00 CHANNEL SLOPE = 0.1352 GIVEN CHANNEL BASE(FEET) = 70.00 CHANNEL FREEBOARD(FEET) = 0.0 "Z" FACTOR = 2.500 MANNING'S FACTOR = 0.030
*ESTIMATED CHANNEL HEIGHT(FEET) = 0.08
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 3.537
SUBAREA LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" C 6.84 0.25 1.000 98
NATURAL POOR COVER
"BARREN" D 0.36 0.20 1.000 98
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 17.23
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 3.34 AVERAGE FLOW DEPTH(FEET) = 0.07 TRAVEL TIME(MIN.) = 4.28 Tc(MIN.) = 13.27
SUBAREA AREA(ACRES) = 7.20 SUBAREA RUNOFF(CFS) = 21.32
EFFECTIVE AREA(ACRES) = 8.92 AREA-AVERAGED Fm(INCH/HR) = 0.25 AREA-AVERAGED Fp(INCH/HR) = 0.25 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 8.9 PEAK FLOW RATE(CFS) = 26.41
GIVEN CHANNEL BASE(FEET) = 70.00 CHANNEL FREEBOARD(FEET) = 0.0 "Z" FACTOR = 2.500 MANNING'S FACTOR = 0.030
*ESTIMATED CHANNEL HEIGHT(FEET) = 0.10
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 0.10 FLOW VELOCITY(FEET/SEC.) = 3.90
LONGEST FLOWPATH FROM NODE 300.00 TO NODE 305.00 = 1169.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 305.00 TO NODE 320.00 IS CODE = 56 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 508.97 DOWNSTREAM(FEET) = 449.09 CHANNEL LENGTH THRU SUBAREA(FEET) = 685.00 CHANNEL SLOPE = 0.0874 GIVEN CHANNEL BASE(FEET) = 70.00 CHANNEL FREEBOARD(FEET) = 0.0 "Z" FACTOR = 2.500 MANNING'S FACTOR = 0.030
*ESTIMATED CHANNEL HEIGHT(FEET) = 0.13
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 3.147
SUBAREA LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" C 3.57 0.25 1.000 98
NATURAL POOR COVER
"BARREN" D 3.33 0.20 1.000 98
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.23
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 35.50
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 3.81 AVERAGE FLOW DEPTH(FEET) = 0.13 TRAVEL TIME(MIN.) = 3.00 Tc(MIN.) = 16.27
SUBAREA AREA(ACRES) = 6.90 SUBAREA RUNOFF(CFS) = 18.14
EFFECTIVE AREA(ACRES) = 15.82 AREA-AVERAGED Fm(INCH/HR) = 0.24 AREA-AVERAGED Fp(INCH/HR) = 0.24 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 15.8 PEAK FLOW RATE(CFS) = 41.43
GIVEN CHANNEL BASE(FEET) = 70.00 CHANNEL FREEBOARD(FEET) = 0.0 "Z" FACTOR = 2.500 MANNING'S FACTOR = 0.030
*ESTIMATED CHANNEL HEIGHT(FEET) = 0.15
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 0.15 FLOW VELOCITY(FEET/SEC.) = 3.98
LONGEST FLOWPATH FROM NODE 300.00 TO NODE 320.00 = 1854.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 320.00 TO NODE 320.00 IS CODE = 10 ---------------------------------------------------------------------------- >>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 1 <<<<< ============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 310.00 TO NODE 312.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< ============================================================================ INITIAL SUBAREA FLOW-LENGTH(FEET) = 310.00
ELEVATION DATA: UPSTREAM(FEET) = 626.57 DOWNSTREAM(FEET) = 585.00 Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 7.784
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.801
SUBAREA Tc AND LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
NATURAL POOR COVER
"BARREN" D 5.08 0.20 1.000 98 7.78
NATURAL POOR COVER
"BARREN" A 0.57 0.40 1.000 93 7.78
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.22
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
SUBAREA RUNOFF(CFS) = 23.29
TOTAL AREA(ACRES) = 5.65 PEAK FLOW RATE(CFS) = 23.29
**************************************************************************** FLOW PROCESS FROM NODE 312.00 TO NODE 315.00 IS CODE = 56 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 585.00 DOWNSTREAM(FEET) = 559.72 CHANNEL LENGTH THRU SUBAREA(FEET) = 399.00 CHANNEL SLOPE = 0.0634 GIVEN CHANNEL BASE(FEET) = 70.00 CHANNEL FREEBOARD(FEET) = 0.0 "Z" FACTOR = 2.500 MANNING'S FACTOR = 0.030
*ESTIMATED CHANNEL HEIGHT(FEET) = 0.13
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.192
SUBAREA LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" D 3.63 0.20 1.000 98
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.20
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 29.83
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 3.20 AVERAGE FLOW DEPTH(FEET) = 0.13 TRAVEL TIME(MIN.) = 2.08 Tc(MIN.) = 9.86
SUBAREA AREA(ACRES) = 3.63 SUBAREA RUNOFF(CFS) = 13.04
EFFECTIVE AREA(ACRES) = 9.28 AREA-AVERAGED Fm(INCH/HR) = 0.21 AREA-AVERAGED Fp(INCH/HR) = 0.21 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 9.3 PEAK FLOW RATE(CFS) = 33.24
GIVEN CHANNEL BASE(FEET) = 70.00 CHANNEL FREEBOARD(FEET) = 0.0 "Z" FACTOR = 2.500 MANNING'S FACTOR = 0.030
*ESTIMATED CHANNEL HEIGHT(FEET) = 0.14
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 0.14 FLOW VELOCITY(FEET/SEC.) = 3.37
LONGEST FLOWPATH FROM NODE 310.00 TO NODE 315.00 = 709.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 315.00 TO NODE 316.00 IS CODE = 56 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 559.72 DOWNSTREAM(FEET) = 505.00 CHANNEL LENGTH THRU SUBAREA(FEET) = 682.00 CHANNEL SLOPE = 0.0802 GIVEN CHANNEL BASE(FEET) = 70.00 CHANNEL FREEBOARD(FEET) = 0.0 "Z" FACTOR = 2.500 MANNING'S FACTOR = 0.030
*ESTIMATED CHANNEL HEIGHT(FEET) = 0.16
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 3.639
SUBAREA LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" C 1.71 0.25 1.000 98
NATURAL POOR COVER
"BARREN" D 6.66 0.20 1.000 98
NATURAL POOR COVER
"BARREN" A 0.69 0.40 1.000 93
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.22
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 47.22
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 4.11 AVERAGE FLOW DEPTH(FEET) = 0.16 TRAVEL TIME(MIN.) = 2.76 Tc(MIN.) = 12.63
SUBAREA AREA(ACRES) = 9.06 SUBAREA RUNOFF(CFS) = 27.84
EFFECTIVE AREA(ACRES) = 18.34 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.22 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 18.3 PEAK FLOW RATE(CFS) = 56.46
GIVEN CHANNEL BASE(FEET) = 70.00 CHANNEL FREEBOARD(FEET) = 0.0 "Z" FACTOR = 2.500 MANNING'S FACTOR = 0.030
*ESTIMATED CHANNEL HEIGHT(FEET) = 0.18
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 0.18 FLOW VELOCITY(FEET/SEC.) = 4.45
LONGEST FLOWPATH FROM NODE 310.00 TO NODE 316.00 = 1391.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 316.00 TO NODE 320.00 IS CODE = 56 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 505.00 DOWNSTREAM(FEET) = 449.09 CHANNEL LENGTH THRU SUBAREA(FEET) = 992.00 CHANNEL SLOPE = 0.0564 GIVEN CHANNEL BASE(FEET) = 70.00 CHANNEL FREEBOARD(FEET) = 0.0 "Z" FACTOR = 2.500 MANNING'S FACTOR = 0.030
*ESTIMATED CHANNEL HEIGHT(FEET) = 0.22
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 3.126
SUBAREA LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" C 0.04 0.25 1.000 98
NATURAL POOR COVER
"BARREN" D 7.24 0.20 1.000 98
NATURAL POOR COVER
"BARREN" A 0.31 0.40 1.000 93
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.21
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 66.42
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 4.31 AVERAGE FLOW DEPTH(FEET) = 0.22 TRAVEL TIME(MIN.) = 3.83 Tc(MIN.) = 16.46
SUBAREA AREA(ACRES) = 7.59 SUBAREA RUNOFF(CFS) = 19.93
EFFECTIVE AREA(ACRES) = 25.93 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.22 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 25.9 PEAK FLOW RATE(CFS) = 67.92
GIVEN CHANNEL BASE(FEET) = 70.00 CHANNEL FREEBOARD(FEET) = 0.0 "Z" FACTOR = 2.500 MANNING'S FACTOR = 0.030
*ESTIMATED CHANNEL HEIGHT(FEET) = 0.22
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 0.22 FLOW VELOCITY(FEET/SEC.) = 4.30
LONGEST FLOWPATH FROM NODE 310.00 TO NODE 320.00 = 2383.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 320.00 TO NODE 320.00 IS CODE = 11 ---------------------------------------------------------------------------- >>>>>CONFLUENCE MEMORY BANK # 1 WITH THE MAIN-STREAM MEMORY<<<<< ============================================================================ ** MAIN STREAM CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 67.92 16.46 3.126 0.22( 0.22) 1.00 25.9 310.00
LONGEST FLOWPATH FROM NODE 310.00 TO NODE 320.00 = 2383.00 FEET. ** MEMORY BANK # 1 CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 41.43 16.27 3.147 0.24( 0.24) 1.00 15.8 300.00
LONGEST FLOWPATH FROM NODE 300.00 TO NODE 320.00 = 1854.00 FEET. ** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 109.04 16.27 3.147 0.22( 0.22) 1.00 41.4 300.00
2 109.04 16.46 3.126 0.22( 0.22) 1.00 41.8 310.00
TOTAL AREA(ACRES) = 41.8
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 109.04 Tc(MIN.) = 16.461
EFFECTIVE AREA(ACRES) = 41.75 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.22 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 41.8
LONGEST FLOWPATH FROM NODE 310.00 TO NODE 320.00 = 2383.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 320.00 TO NODE 320.00 IS CODE = 12 ---------------------------------------------------------------------------- >>>>>CLEAR MEMORY BANK # 1 <<<<<
============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 320.00 TO NODE 321.00 IS CODE = 56 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 449.09 DOWNSTREAM(FEET) = 438.56 CHANNEL LENGTH THRU SUBAREA(FEET) = 333.00 CHANNEL SLOPE = 0.0316 GIVEN CHANNEL BASE(FEET) = 10.00 CHANNEL FREEBOARD(FEET) = 0.0 "Z" FACTOR = 2.500 MANNING'S FACTOR = 0.030
*ESTIMATED CHANNEL HEIGHT(FEET) = 1.07
CHANNEL FLOW THRU SUBAREA(CFS) = 109.04
FLOW VELOCITY(FEET/SEC.) = 8.01 FLOW DEPTH(FEET) = 1.07 TRAVEL TIME(MIN.) = 0.69 Tc(MIN.) = 17.15
LONGEST FLOWPATH FROM NODE 310.00 TO NODE 321.00 = 2716.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 321.00 TO NODE 321.00 IS CODE = 10 ---------------------------------------------------------------------------- >>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 1 <<<<< ============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 500.00 TO NODE 505.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< ============================================================================ INITIAL SUBAREA FLOW-LENGTH(FEET) = 283.00
ELEVATION DATA: UPSTREAM(FEET) = 473.77 DOWNSTREAM(FEET) = 446.11 Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 7.996
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.728
SUBAREA Tc AND LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
NATURAL POOR COVER
"BARREN" D 2.80 0.20 1.000 98 8.00
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.20
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
SUBAREA RUNOFF(CFS) = 11.41
TOTAL AREA(ACRES) = 2.80 PEAK FLOW RATE(CFS) = 11.41
**************************************************************************** FLOW PROCESS FROM NODE 505.00 TO NODE 321.00 IS CODE = 56 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 446.11 DOWNSTREAM(FEET) = 438.56 CHANNEL LENGTH THRU SUBAREA(FEET) = 610.00 CHANNEL SLOPE = 0.0124 GIVEN CHANNEL BASE(FEET) = 10.00 CHANNEL FREEBOARD(FEET) = 0.0 "Z" FACTOR = 2.500 MANNING'S FACTOR = 0.030
*ESTIMATED CHANNEL HEIGHT(FEET) = 0.38
CHANNEL FLOW THRU SUBAREA(CFS) = 11.41
FLOW VELOCITY(FEET/SEC.) = 2.71 FLOW DEPTH(FEET) = 0.38 TRAVEL TIME(MIN.) = 3.75 Tc(MIN.) = 11.75
LONGEST FLOWPATH FROM NODE 500.00 TO NODE 321.00 = 893.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 321.00 TO NODE 321.00 IS CODE = 11 ---------------------------------------------------------------------------- >>>>>CONFLUENCE MEMORY BANK # 1 WITH THE MAIN-STREAM MEMORY<<<<< ============================================================================ ** MAIN STREAM CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 11.41 11.75 3.792 0.20( 0.20) 1.00 2.8 500.00
LONGEST FLOWPATH FROM NODE 500.00 TO NODE 321.00 = 893.00 FEET. ** MEMORY BANK # 1 CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 109.04 16.96 3.073 0.22( 0.22) 1.00 41.4 300.00
2 109.04 17.15 3.053 0.22( 0.22) 1.00 41.8 310.00
LONGEST FLOWPATH FROM NODE 310.00 TO NODE 321.00 = 2716.00 FEET. ** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 106.02 11.75 3.792 0.22( 0.22) 1.00 31.5 500.00
2 118.16 16.96 3.073 0.22( 0.22) 1.00 44.2 300.00
3 118.10 17.15 3.053 0.22( 0.22) 1.00 44.5 310.00
TOTAL AREA(ACRES) = 44.5
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 118.16 Tc(MIN.) = 16.959
EFFECTIVE AREA(ACRES) = 44.24 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.22 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 44.5
LONGEST FLOWPATH FROM NODE 310.00 TO NODE 321.00 = 2716.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 321.00 TO NODE 321.00 IS CODE = 12 ---------------------------------------------------------------------------- >>>>>CLEAR MEMORY BANK # 1 <<<<<
============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 321.00 TO NODE 325.00 IS CODE = 56 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 438.56 DOWNSTREAM(FEET) = 419.89 CHANNEL LENGTH THRU SUBAREA(FEET) = 455.00 CHANNEL SLOPE = 0.0410 GIVEN CHANNEL BASE(FEET) = 10.00 CHANNEL FREEBOARD(FEET) = 0.0 "Z" FACTOR = 2.500 MANNING'S FACTOR = 0.030
*ESTIMATED CHANNEL HEIGHT(FEET) = 1.12
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 2.991
SUBAREA LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" D 11.84 0.20 1.000 98
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.20
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 133.03 TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 9.29 AVERAGE FLOW DEPTH(FEET) = 1.12 TRAVEL TIME(MIN.) = 0.82 Tc(MIN.) = 17.78
SUBAREA AREA(ACRES) = 11.84 SUBAREA RUNOFF(CFS) = 29.74 EFFECTIVE AREA(ACRES) = 56.08 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.22 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 56.4 PEAK FLOW RATE(CFS) = 140.00
GIVEN CHANNEL BASE(FEET) = 10.00 CHANNEL FREEBOARD(FEET) = 0.0 "Z" FACTOR = 2.500 MANNING'S FACTOR = 0.030
*ESTIMATED CHANNEL HEIGHT(FEET) = 1.15
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 1.15 FLOW VELOCITY(FEET/SEC.) = 9.46
LONGEST FLOWPATH FROM NODE 310.00 TO NODE 325.00 = 3171.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 325.00 TO NODE 270.00 IS CODE = 52 ---------------------------------------------------------------------------- >>>>>COMPUTE NATURAL VALLEY CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 419.89 DOWNSTREAM(FEET) = 406.00 CHANNEL LENGTH THRU SUBAREA(FEET) = 568.00 CHANNEL SLOPE = 0.0245 CHANNEL FLOW THRU SUBAREA(CFS) = 140.00
FLOW VELOCITY(FEET/SEC) = 8.22 (PER LACFCD/RCFC&WCD HYDROLOGY MANUAL) TRAVEL TIME(MIN.) = 1.15 Tc(MIN.) = 18.93
LONGEST FLOWPATH FROM NODE 310.00 TO NODE 270.00 = 3739.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 270.00 TO NODE 270.00 IS CODE = 11 ---------------------------------------------------------------------------- >>>>>CONFLUENCE MEMORY BANK # 2 WITH THE MAIN-STREAM MEMORY<<<<< ============================================================================ ** MAIN STREAM CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 133.83 13.75 3.465 0.22( 0.22) 1.00 43.4 500.00
2 140.00 18.93 2.886 0.22( 0.22) 1.00 56.1 300.00
3 139.82 19.12 2.869 0.22( 0.22) 1.00 56.4 310.00
LONGEST FLOWPATH FROM NODE 310.00 TO NODE 270.00 = 3739.00 FEET. ** MEMORY BANK # 2 CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 33.73 10.15 4.125 0.21( 0.21) 1.00 9.6 265.00
LONGEST FLOWPATH FROM NODE 265.00 TO NODE 270.00 = 860.00 FEET. ** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 152.51 10.15 4.125 0.22( 0.22) 1.00 41.6 265.00
2 161.87 13.75 3.465 0.22( 0.22) 1.00 52.9 500.00
3 163.05 18.93 2.886 0.22( 0.22) 1.00 65.7 300.00
4 162.73 19.12 2.869 0.22( 0.22) 1.00 66.0 310.00
TOTAL AREA(ACRES) = 66.0
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 163.05 Tc(MIN.) = 18.927
EFFECTIVE AREA(ACRES) = 65.66 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.22 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 66.0
LONGEST FLOWPATH FROM NODE 310.00 TO NODE 270.00 = 3739.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 270.00 TO NODE 270.00 IS CODE = 12 ---------------------------------------------------------------------------- >>>>>CLEAR MEMORY BANK # 2 <<<<<
============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 270.00 TO NODE 260.00 IS CODE = 52 ---------------------------------------------------------------------------- >>>>>COMPUTE NATURAL VALLEY CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 406.00 DOWNSTREAM(FEET) = 400.00 CHANNEL LENGTH THRU SUBAREA(FEET) = 341.00 CHANNEL SLOPE = 0.0176 CHANNEL FLOW THRU SUBAREA(CFS) = 163.05
FLOW VELOCITY(FEET/SEC) = 7.30 (PER LACFCD/RCFC&WCD HYDROLOGY MANUAL) TRAVEL TIME(MIN.) = 0.78 Tc(MIN.) = 19.71
LONGEST FLOWPATH FROM NODE 310.00 TO NODE 260.00 = 4080.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 260.00 TO NODE 260.00 IS CODE = 11 ---------------------------------------------------------------------------- >>>>>CONFLUENCE MEMORY BANK # 3 WITH THE MAIN-STREAM MEMORY<<<<< ============================================================================ ** MAIN STREAM CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 152.51 10.94 3.951 0.22( 0.22) 1.00 41.6 265.00
2 161.87 14.53 3.357 0.22( 0.22) 1.00 52.9 500.00
3 163.05 19.71 2.820 0.22( 0.22) 1.00 65.7 300.00
4 162.73 19.90 2.804 0.22( 0.22) 1.00 66.0 310.00
LONGEST FLOWPATH FROM NODE 310.00 TO NODE 260.00 = 4080.00 FEET. ** MEMORY BANK # 3 CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 288.31 16.61 3.110 0.24( 0.24) 1.00 95.9 250.00
2 288.80 21.32 2.695 0.24( 0.24) 1.00 113.0 235.00
3 270.58 29.87 2.222 0.24( 0.24) 1.00 136.0 215.00
4 267.74 31.72 2.147 0.24( 0.24) 1.00 141.1 200.00
5 266.63 31.90 2.139 0.24( 0.24) 1.00 141.2 210.00
LONGEST FLOWPATH FROM NODE 200.00 TO NODE 260.00 = 5667.00 FEET. ** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 398.04 10.94 3.951 0.23( 0.23) 1.00 104.7 265.00
2 435.87 14.53 3.357 0.23( 0.23) 1.00 136.8 500.00
3 450.65 16.61 3.110 0.23( 0.23) 1.00 154.0 250.00
4 451.68 19.71 2.820 0.23( 0.23) 1.00 172.8 300.00
5 451.38 19.90 2.804 0.23( 0.23) 1.00 173.8 310.00
6 444.70 21.32 2.695 0.23( 0.23) 1.00 179.0 235.00
7 396.70 29.87 2.222 0.23( 0.23) 1.00 202.0 215.00
8 389.12 31.72 2.147 0.23( 0.23) 1.00 207.1 200.00
9 387.56 31.90 2.139 0.23( 0.23) 1.00 207.2 210.00
TOTAL AREA(ACRES) = 207.2
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 451.68 Tc(MIN.) = 19.705
EFFECTIVE AREA(ACRES) = 172.82 AREA-AVERAGED Fm(INCH/HR) = 0.23 AREA-AVERAGED Fp(INCH/HR) = 0.23 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 207.2
LONGEST FLOWPATH FROM NODE 200.00 TO NODE 260.00 = 5667.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 260.00 TO NODE 260.00 IS CODE = 12 ---------------------------------------------------------------------------- >>>>>CLEAR MEMORY BANK # 3 <<<<<
============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 260.00 TO NODE 299.00 IS CODE = 52 ---------------------------------------------------------------------------- >>>>>COMPUTE NATURAL VALLEY CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 400.00 DOWNSTREAM(FEET) = 398.00 CHANNEL LENGTH THRU SUBAREA(FEET) = 165.00 CHANNEL SLOPE = 0.0121 CHANNEL FLOW THRU SUBAREA(CFS) = 451.68
FLOW VELOCITY(FEET/SEC) = 8.35 (PER LACFCD/RCFC&WCD HYDROLOGY MANUAL) TRAVEL TIME(MIN.) = 0.33 Tc(MIN.) = 20.03
LONGEST FLOWPATH FROM NODE 200.00 TO NODE 299.00 = 5832.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 400.00 TO NODE 402.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< ============================================================================ INITIAL SUBAREA FLOW-LENGTH(FEET) = 326.00
ELEVATION DATA: UPSTREAM(FEET) = 858.53 DOWNSTREAM(FEET) = 740.00 Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 6.506
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 5.321
SUBAREA Tc AND LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
NATURAL POOR COVER
"BARREN" C 1.90 0.25 1.000 98 6.51
NATURAL POOR COVER
"BARREN" D 0.47 0.20 1.000 98 6.51
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.24
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
SUBAREA RUNOFF(CFS) = 10.84
TOTAL AREA(ACRES) = 2.37 PEAK FLOW RATE(CFS) = 10.84
**************************************************************************** FLOW PROCESS FROM NODE 402.00 TO NODE 405.00 IS CODE = 51 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 740.00 DOWNSTREAM(FEET) = 648.00 CHANNEL LENGTH THRU SUBAREA(FEET) = 827.00 CHANNEL SLOPE = 0.1112 CHANNEL BASE(FEET) = 0.00 "Z" FACTOR = 2.500
MANNING'S FACTOR = 0.030 MAXIMUM DEPTH(FEET) = 10.00
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.723
SUBAREA LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" C 1.14 0.25 1.000 98
NATURAL POOR COVER
"BARREN" D 2.56 0.20 1.000 98
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.22
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 18.36
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 9.16 AVERAGE FLOW DEPTH(FEET) = 0.90 TRAVEL TIME(MIN.) = 1.51 Tc(MIN.) = 8.01
SUBAREA AREA(ACRES) = 3.70 SUBAREA RUNOFF(CFS) = 15.01
EFFECTIVE AREA(ACRES) = 6.07 AREA-AVERAGED Fm(INCH/HR) = 0.23 AREA-AVERAGED Fp(INCH/HR) = 0.23 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 6.1 PEAK FLOW RATE(CFS) = 24.57
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 1.00 FLOW VELOCITY(FEET/SEC.) = 9.90
LONGEST FLOWPATH FROM NODE 400.00 TO NODE 405.00 = 1153.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 405.00 TO NODE 405.00 IS CODE = 10 ---------------------------------------------------------------------------- >>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 1 <<<<< ============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 800.00 TO NODE 403.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< ============================================================================ INITIAL SUBAREA FLOW-LENGTH(FEET) = 320.00
ELEVATION DATA: UPSTREAM(FEET) = 874.02 DOWNSTREAM(FEET) = 734.00 Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 6.223
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 5.458
SUBAREA Tc AND LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
NATURAL POOR COVER
"BARREN" C 1.30 0.25 1.000 98 6.22
NATURAL POOR COVER
"BARREN" D 1.42 0.20 1.000 98 6.22
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.22
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
SUBAREA RUNOFF(CFS) = 12.81
TOTAL AREA(ACRES) = 2.72 PEAK FLOW RATE(CFS) = 12.81
**************************************************************************** FLOW PROCESS FROM NODE 403.00 TO NODE 408.00 IS CODE = 51 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 734.00 DOWNSTREAM(FEET) = 671.73 CHANNEL LENGTH THRU SUBAREA(FEET) = 320.00 CHANNEL SLOPE = 0.1946 CHANNEL BASE(FEET) = 0.00 "Z" FACTOR = 2.500
MANNING'S FACTOR = 0.030 MAXIMUM DEPTH(FEET) = 10.00
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 5.228
SUBAREA LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" D 1.58 0.20 1.000 98
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.20
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 16.39
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 10.96 AVERAGE FLOW DEPTH(FEET) = 0.77 TRAVEL TIME(MIN.) = 0.49 Tc(MIN.) = 6.71
SUBAREA AREA(ACRES) = 1.58 SUBAREA RUNOFF(CFS) = 7.15
EFFECTIVE AREA(ACRES) = 4.30 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.22 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 4.3 PEAK FLOW RATE(CFS) = 19.40
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 0.82 FLOW VELOCITY(FEET/SEC.) = 11.51
LONGEST FLOWPATH FROM NODE 800.00 TO NODE 408.00 = 640.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 408.00 TO NODE 408.00 IS CODE = 10 ---------------------------------------------------------------------------- >>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 2 <<<<< ============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 406.00 TO NODE 407.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< ============================================================================ INITIAL SUBAREA FLOW-LENGTH(FEET) = 178.00
ELEVATION DATA: UPSTREAM(FEET) = 1058.19 DOWNSTREAM(FEET) = 984.25 Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 5.000
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 6.187
SUBAREA Tc AND LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
NATURAL POOR COVER
"BARREN" C 2.11 0.25 1.000 98 5.00
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
SUBAREA RUNOFF(CFS) = 11.27
TOTAL AREA(ACRES) = 2.11 PEAK FLOW RATE(CFS) = 11.27
**************************************************************************** FLOW PROCESS FROM NODE 407.00 TO NODE 408.00 IS CODE = 51 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 984.25 DOWNSTREAM(FEET) = 671.73 CHANNEL LENGTH THRU SUBAREA(FEET) = 1509.00 CHANNEL SLOPE = 0.2071 CHANNEL BASE(FEET) = 0.00 "Z" FACTOR = 2.500
MANNING'S FACTOR = 0.030 MAXIMUM DEPTH(FEET) = 10.00
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 5.250
SUBAREA LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" C 11.69 0.25 1.000 98
NATURAL POOR COVER
"BARREN" D 6.59 0.20 1.000 98
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.23
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 52.74
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 15.16 AVERAGE FLOW DEPTH(FEET) = 1.18 TRAVEL TIME(MIN.) = 1.66 Tc(MIN.) = 6.66
SUBAREA AREA(ACRES) = 18.28 SUBAREA RUNOFF(CFS) = 82.56 EFFECTIVE AREA(ACRES) = 20.39 AREA-AVERAGED Fm(INCH/HR) = 0.23 AREA-AVERAGED Fp(INCH/HR) = 0.23 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 20.4 PEAK FLOW RATE(CFS) = 92.06
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 1.45 FLOW VELOCITY(FEET/SEC.) = 17.41
LONGEST FLOWPATH FROM NODE 406.00 TO NODE 408.00 = 1687.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 408.00 TO NODE 408.00 IS CODE = 11 ---------------------------------------------------------------------------- >>>>>CONFLUENCE MEMORY BANK # 2 WITH THE MAIN-STREAM MEMORY<<<<< ============================================================================ ** MAIN STREAM CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 92.06 6.66 5.250 0.23( 0.23) 1.00 20.4 406.00
LONGEST FLOWPATH FROM NODE 406.00 TO NODE 408.00 = 1687.00 FEET. ** MEMORY BANK # 2 CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 19.40 6.71 5.228 0.22( 0.22) 1.00 4.3 800.00
LONGEST FLOWPATH FROM NODE 800.00 TO NODE 408.00 = 640.00 FEET. ** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 111.40 6.66 5.250 0.23( 0.23) 1.00 24.7 406.00
2 111.04 6.71 5.228 0.23( 0.23) 1.00 24.7 800.00
TOTAL AREA(ACRES) = 24.7
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 111.40 Tc(MIN.) = 6.659
EFFECTIVE AREA(ACRES) = 24.66 AREA-AVERAGED Fm(INCH/HR) = 0.23 AREA-AVERAGED Fp(INCH/HR) = 0.23 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 24.7
LONGEST FLOWPATH FROM NODE 406.00 TO NODE 408.00 = 1687.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 408.00 TO NODE 408.00 IS CODE = 12 ---------------------------------------------------------------------------- >>>>>CLEAR MEMORY BANK # 2 <<<<<
============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 408.00 TO NODE 405.00 IS CODE = 51 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 671.73 DOWNSTREAM(FEET) = 648.00 CHANNEL LENGTH THRU SUBAREA(FEET) = 563.00 CHANNEL SLOPE = 0.0421 CHANNEL BASE(FEET) = 0.00 "Z" FACTOR = 2.500
MANNING'S FACTOR = 0.030 MAXIMUM DEPTH(FEET) = 10.00
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.872
SUBAREA LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" C 0.66 0.25 1.000 98
NATURAL POOR COVER
"BARREN" D 0.96 0.20 1.000 98
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.22
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 114.79 TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 10.11 AVERAGE FLOW DEPTH(FEET) = 2.13 TRAVEL TIME(MIN.) = 0.93 Tc(MIN.) = 7.59
SUBAREA AREA(ACRES) = 1.62 SUBAREA RUNOFF(CFS) = 6.78
EFFECTIVE AREA(ACRES) = 26.28 AREA-AVERAGED Fm(INCH/HR) = 0.23 AREA-AVERAGED Fp(INCH/HR) = 0.23 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 26.3 PEAK FLOW RATE(CFS) = 111.40
NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 2.11 FLOW VELOCITY(FEET/SEC.) = 10.02
LONGEST FLOWPATH FROM NODE 406.00 TO NODE 405.00 = 2250.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 405.00 TO NODE 405.00 IS CODE = 11 ---------------------------------------------------------------------------- >>>>>CONFLUENCE MEMORY BANK # 1 WITH THE MAIN-STREAM MEMORY<<<<< ============================================================================ ** MAIN STREAM CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 111.40 7.59 4.872 0.23( 0.23) 1.00 26.3 406.00
2 111.04 7.64 4.852 0.23( 0.23) 1.00 26.3 800.00
LONGEST FLOWPATH FROM NODE 406.00 TO NODE 405.00 = 2250.00 FEET. ** MEMORY BANK # 1 CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 24.57 8.01 4.723 0.23( 0.23) 1.00 6.1 400.00
LONGEST FLOWPATH FROM NODE 400.00 TO NODE 405.00 = 1153.00 FEET. ** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 135.44 7.59 4.872 0.23( 0.23) 1.00 32.0 406.00
2 135.15 7.64 4.852 0.23( 0.23) 1.00 32.1 800.00
3 132.49 8.01 4.723 0.23( 0.23) 1.00 32.4 400.00
TOTAL AREA(ACRES) = 32.4
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 135.44 Tc(MIN.) = 7.588
EFFECTIVE AREA(ACRES) = 32.03 AREA-AVERAGED Fm(INCH/HR) = 0.23 AREA-AVERAGED Fp(INCH/HR) = 0.23 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 32.4
LONGEST FLOWPATH FROM NODE 406.00 TO NODE 405.00 = 2250.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 405.00 TO NODE 405.00 IS CODE = 12 ---------------------------------------------------------------------------- >>>>>CLEAR MEMORY BANK # 1 <<<<<
============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 405.00 TO NODE 410.00 IS CODE = 51 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 648.00 DOWNSTREAM(FEET) = 633.77 CHANNEL LENGTH THRU SUBAREA(FEET) = 707.00 CHANNEL SLOPE = 0.0201 CHANNEL BASE(FEET) = 0.00 "Z" FACTOR = 2.500
MANNING'S FACTOR = 0.030 MAXIMUM DEPTH(FEET) = 10.00
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.410
SUBAREA LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" C 2.98 0.25 1.000 98
NATURAL POOR COVER
"BARREN" D 3.60 0.20 1.000 98
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.22
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 147.84 TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 8.17 AVERAGE FLOW DEPTH(FEET) = 2.69 TRAVEL TIME(MIN.) = 1.44 Tc(MIN.) = 9.03
SUBAREA AREA(ACRES) = 6.58 SUBAREA RUNOFF(CFS) = 24.80
EFFECTIVE AREA(ACRES) = 38.61 AREA-AVERAGED Fm(INCH/HR) = 0.23 AREA-AVERAGED Fp(INCH/HR) = 0.23 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 39.0 PEAK FLOW RATE(CFS) = 145.30
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 2.68 FLOW VELOCITY(FEET/SEC.) = 8.12
LONGEST FLOWPATH FROM NODE 406.00 TO NODE 410.00 = 2957.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 410.00 TO NODE 420.00 IS CODE = 51 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 633.77 DOWNSTREAM(FEET) = 612.75 CHANNEL LENGTH THRU SUBAREA(FEET) = 1022.00 CHANNEL SLOPE = 0.0206 CHANNEL BASE(FEET) = 0.00 "Z" FACTOR = 2.500
MANNING'S FACTOR = 0.030 MAXIMUM DEPTH(FEET) = 10.00
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 3.939
SUBAREA LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" A 1.92 0.40 1.000 93
NATURAL POOR COVER
"BARREN" C 11.60 0.25 1.000 98
NATURAL POOR COVER
"BARREN" D 8.26 0.20 1.000 98
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.24
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 181.53 TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 8.66 AVERAGE FLOW DEPTH(FEET) = 2.90 TRAVEL TIME(MIN.) = 1.97 Tc(MIN.) = 11.00
SUBAREA AREA(ACRES) = 21.78 SUBAREA RUNOFF(CFS) = 72.42 EFFECTIVE AREA(ACRES) = 60.39 AREA-AVERAGED Fm(INCH/HR) = 0.23 AREA-AVERAGED Fp(INCH/HR) = 0.23 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 60.7 PEAK FLOW RATE(CFS) = 201.35
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 3.01 FLOW VELOCITY(FEET/SEC.) = 8.88
LONGEST FLOWPATH FROM NODE 406.00 TO NODE 420.00 = 3979.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 420.00 TO NODE 420.00 IS CODE = 10 ---------------------------------------------------------------------------- >>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 1 <<<<< ============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 411.00 TO NODE 412.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< ============================================================================ INITIAL SUBAREA FLOW-LENGTH(FEET) = 239.00
ELEVATION DATA: UPSTREAM(FEET) = 1140.97 DOWNSTREAM(FEET) = 1082.68 Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 6.224
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 5.458
SUBAREA Tc AND LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
NATURAL POOR COVER
"BARREN" D 1.26 0.20 1.000 98 6.22
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.20
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
SUBAREA RUNOFF(CFS) = 5.96
TOTAL AREA(ACRES) = 1.26 PEAK FLOW RATE(CFS) = 5.96
**************************************************************************** FLOW PROCESS FROM NODE 412.00 TO NODE 415.00 IS CODE = 51 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 1082.68 DOWNSTREAM(FEET) = 706.33 CHANNEL LENGTH THRU SUBAREA(FEET) = 1409.00 CHANNEL SLOPE = 0.2671 CHANNEL BASE(FEET) = 0.00 "Z" FACTOR = 2.500
MANNING'S FACTOR = 0.030 MAXIMUM DEPTH(FEET) = 10.00
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.817
SUBAREA LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" C 1.62 0.25 1.000 98
NATURAL POOR COVER
"BARREN" D 14.57 0.20 1.000 98
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.21
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 39.66
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 15.49 AVERAGE FLOW DEPTH(FEET) = 1.01 TRAVEL TIME(MIN.) = 1.52 Tc(MIN.) = 7.74
SUBAREA AREA(ACRES) = 16.19 SUBAREA RUNOFF(CFS) = 67.20 EFFECTIVE AREA(ACRES) = 17.45 AREA-AVERAGED Fm(INCH/HR) = 0.20 AREA-AVERAGED Fp(INCH/HR) = 0.20 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 17.5 PEAK FLOW RATE(CFS) = 72.44
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 1.27 FLOW VELOCITY(FEET/SEC.) = 17.98
LONGEST FLOWPATH FROM NODE 411.00 TO NODE 415.00 = 1648.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 415.00 TO NODE 415.00 IS CODE = 10 ---------------------------------------------------------------------------- >>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 2 <<<<< ============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 413.00 TO NODE 414.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< ============================================================================ INITIAL SUBAREA FLOW-LENGTH(FEET) = 273.00
ELEVATION DATA: UPSTREAM(FEET) = 1101.23 DOWNSTREAM(FEET) = 1025.31 Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 6.394
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 5.374
SUBAREA Tc AND LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
NATURAL POOR COVER
"BARREN" C 2.34 0.25 1.000 98 6.39
NATURAL POOR COVER
"BARREN" D 3.50 0.20 1.000 98 6.39
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.22
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
SUBAREA RUNOFF(CFS) = 27.09
TOTAL AREA(ACRES) = 5.84 PEAK FLOW RATE(CFS) = 27.09
**************************************************************************** FLOW PROCESS FROM NODE 414.00 TO NODE 415.00 IS CODE = 51 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 1025.31 DOWNSTREAM(FEET) = 706.33 CHANNEL LENGTH THRU SUBAREA(FEET) = 1345.00 CHANNEL SLOPE = 0.2372 CHANNEL BASE(FEET) = 0.00 "Z" FACTOR = 2.500
MANNING'S FACTOR = 0.030 MAXIMUM DEPTH(FEET) = 10.00
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.817
SUBAREA LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" C 8.55 0.25 1.000 98
NATURAL POOR COVER
"BARREN" D 8.56 0.20 1.000 98
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.22
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 62.50
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 16.65 AVERAGE FLOW DEPTH(FEET) = 1.23 TRAVEL TIME(MIN.) = 1.35 Tc(MIN.) = 7.74
SUBAREA AREA(ACRES) = 17.11 SUBAREA RUNOFF(CFS) = 70.71 EFFECTIVE AREA(ACRES) = 22.95 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.22 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 23.0 PEAK FLOW RATE(CFS) = 94.87
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 1.44 FLOW VELOCITY(FEET/SEC.) = 18.37
LONGEST FLOWPATH FROM NODE 413.00 TO NODE 415.00 = 1618.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 415.00 TO NODE 415.00 IS CODE = 11 ---------------------------------------------------------------------------- >>>>>CONFLUENCE MEMORY BANK # 2 WITH THE MAIN-STREAM MEMORY<<<<< ============================================================================ ** MAIN STREAM CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 94.87 7.74 4.817 0.22( 0.22) 1.00 23.0 413.00
LONGEST FLOWPATH FROM NODE 413.00 TO NODE 415.00 = 1618.00 FEET. ** MEMORY BANK # 2 CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 72.44 7.74 4.817 0.20( 0.20) 1.00 17.5 411.00
LONGEST FLOWPATH FROM NODE 411.00 TO NODE 415.00 = 1648.00 FEET. ** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 167.30 7.74 4.817 0.22( 0.22) 1.00 40.4 411.00
2 167.30 7.74 4.817 0.22( 0.22) 1.00 40.4 413.00
TOTAL AREA(ACRES) = 40.4
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 167.30 Tc(MIN.) = 7.740
EFFECTIVE AREA(ACRES) = 40.40 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.22 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 40.4
LONGEST FLOWPATH FROM NODE 411.00 TO NODE 415.00 = 1648.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 415.00 TO NODE 415.00 IS CODE = 12 ---------------------------------------------------------------------------- >>>>>CLEAR MEMORY BANK # 2 <<<<<
============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 415.00 TO NODE 416.00 IS CODE = 51 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 706.33 DOWNSTREAM(FEET) = 642.73 CHANNEL LENGTH THRU SUBAREA(FEET) = 1121.00 CHANNEL SLOPE = 0.0567 CHANNEL BASE(FEET) = 0.00 "Z" FACTOR = 2.500
MANNING'S FACTOR = 0.030 MAXIMUM DEPTH(FEET) = 10.00
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.367
SUBAREA LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" C 9.92 0.25 1.000 98
NATURAL POOR COVER
"BARREN" D 6.02 0.20 1.000 98
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.23
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 196.97 TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 12.92 AVERAGE FLOW DEPTH(FEET) = 2.47 TRAVEL TIME(MIN.) = 1.45 Tc(MIN.) = 9.19
SUBAREA AREA(ACRES) = 15.94 SUBAREA RUNOFF(CFS) = 59.33 EFFECTIVE AREA(ACRES) = 56.34 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.22 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 56.3 PEAK FLOW RATE(CFS) = 210.26
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 2.53 FLOW VELOCITY(FEET/SEC.) = 13.14
LONGEST FLOWPATH FROM NODE 411.00 TO NODE 416.00 = 2769.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 416.00 TO NODE 416.10 IS CODE = 51 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 642.73 DOWNSTREAM(FEET) = 639.92 CHANNEL LENGTH THRU SUBAREA(FEET) = 260.00 CHANNEL SLOPE = 0.0108 CHANNEL BASE(FEET) = 0.00 "Z" FACTOR = 2.500
MANNING'S FACTOR = 0.030 MAXIMUM DEPTH(FEET) = 10.00
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.209
SUBAREA LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" C 3.39 0.25 1.000 98
NATURAL POOR COVER
"BARREN" D 0.70 0.20 1.000 98
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.24
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 217.56 TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 7.12 AVERAGE FLOW DEPTH(FEET) = 3.50 TRAVEL TIME(MIN.) = 0.61 Tc(MIN.) = 9.79
SUBAREA AREA(ACRES) = 4.09 SUBAREA RUNOFF(CFS) = 14.60
EFFECTIVE AREA(ACRES) = 60.43 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.22 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 60.4 PEAK FLOW RATE(CFS) = 216.87
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 3.49 FLOW VELOCITY(FEET/SEC.) = 7.12
LONGEST FLOWPATH FROM NODE 411.00 TO NODE 416.10 = 3029.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 416.10 TO NODE 419.00 IS CODE = 51 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 639.92 DOWNSTREAM(FEET) = 625.00 CHANNEL LENGTH THRU SUBAREA(FEET) = 730.00 CHANNEL SLOPE = 0.0204 CHANNEL BASE(FEET) = 0.00 "Z" FACTOR = 2.500
MANNING'S FACTOR = 0.030 MAXIMUM DEPTH(FEET) = 10.00
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 3.911
SUBAREA LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" A 0.03 0.40 1.000 93
NATURAL POOR COVER
"BARREN" C 0.36 0.25 1.000 98
NATURAL POOR COVER
"BARREN" D 1.91 0.20 1.000 98
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.21
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 220.70 TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 9.08 AVERAGE FLOW DEPTH(FEET) = 3.12 TRAVEL TIME(MIN.) = 1.34 Tc(MIN.) = 11.13
SUBAREA AREA(ACRES) = 2.30 SUBAREA RUNOFF(CFS) = 7.66
EFFECTIVE AREA(ACRES) = 62.73 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.22 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 62.7 PEAK FLOW RATE(CFS) = 216.87
NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 3.10 FLOW VELOCITY(FEET/SEC.) = 9.02
LONGEST FLOWPATH FROM NODE 411.00 TO NODE 419.00 = 3759.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 419.00 TO NODE 419.00 IS CODE = 10 ---------------------------------------------------------------------------- >>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 2 <<<<< ============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 417.00 TO NODE 418.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< ============================================================================ INITIAL SUBAREA FLOW-LENGTH(FEET) = 329.00
ELEVATION DATA: UPSTREAM(FEET) = 860.00 DOWNSTREAM(FEET) = 715.00 Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 6.284
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 5.428
SUBAREA Tc AND LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
NATURAL POOR COVER
"BARREN" C 2.22 0.25 1.000 98 6.28
NATURAL POOR COVER
"BARREN" D 1.21 0.20 1.000 98 6.28
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.23
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
SUBAREA RUNOFF(CFS) = 16.04
TOTAL AREA(ACRES) = 3.43 PEAK FLOW RATE(CFS) = 16.04
**************************************************************************** FLOW PROCESS FROM NODE 418.00 TO NODE 419.00 IS CODE = 51 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 715.00 DOWNSTREAM(FEET) = 625.00 CHANNEL LENGTH THRU SUBAREA(FEET) = 600.00 CHANNEL SLOPE = 0.1500 CHANNEL BASE(FEET) = 0.00 "Z" FACTOR = 2.500
MANNING'S FACTOR = 0.030 MAXIMUM DEPTH(FEET) = 10.00
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 5.040
SUBAREA LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" C 0.75 0.25 1.000 98
NATURAL POOR COVER
"BARREN" D 5.02 0.20 1.000 98
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.21
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 28.59
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 11.52 AVERAGE FLOW DEPTH(FEET) = 1.00 TRAVEL TIME(MIN.) = 0.87 Tc(MIN.) = 7.15
SUBAREA AREA(ACRES) = 5.77 SUBAREA RUNOFF(CFS) = 25.10
EFFECTIVE AREA(ACRES) = 9.20 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.22 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 9.2 PEAK FLOW RATE(CFS) = 39.94
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 1.13 FLOW VELOCITY(FEET/SEC.) = 12.47
LONGEST FLOWPATH FROM NODE 417.00 TO NODE 419.00 = 929.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 419.00 TO NODE 419.00 IS CODE = 11 ---------------------------------------------------------------------------- >>>>>CONFLUENCE MEMORY BANK # 2 WITH THE MAIN-STREAM MEMORY<<<<< ============================================================================ ** MAIN STREAM CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 39.94 7.15 5.040 0.22( 0.22) 1.00 9.2 417.00
LONGEST FLOWPATH FROM NODE 417.00 TO NODE 419.00 = 929.00 FEET. ** MEMORY BANK # 2 CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 216.87 11.13 3.911 0.22( 0.22) 1.00 62.7 411.00
2 216.86 11.13 3.911 0.22( 0.22) 1.00 62.7 413.00
LONGEST FLOWPATH FROM NODE 411.00 TO NODE 419.00 = 3759.00 FEET. ** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 221.87 7.15 5.040 0.22( 0.22) 1.00 49.5 417.00
2 247.46 11.13 3.911 0.22( 0.22) 1.00 71.9 411.00
3 247.45 11.13 3.911 0.22( 0.22) 1.00 71.9 413.00
TOTAL AREA(ACRES) = 71.9
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 247.46 Tc(MIN.) = 11.134
EFFECTIVE AREA(ACRES) = 71.93 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.22 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 71.9
LONGEST FLOWPATH FROM NODE 411.00 TO NODE 419.00 = 3759.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 419.00 TO NODE 419.00 IS CODE = 12 ---------------------------------------------------------------------------- >>>>>CLEAR MEMORY BANK # 2 <<<<<
============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 419.00 TO NODE 420.00 IS CODE = 51 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 625.00 DOWNSTREAM(FEET) = 612.75 CHANNEL LENGTH THRU SUBAREA(FEET) = 902.00 CHANNEL SLOPE = 0.0136 CHANNEL BASE(FEET) = 0.00 "Z" FACTOR = 2.500
MANNING'S FACTOR = 0.030 MAXIMUM DEPTH(FEET) = 10.00
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 3.580
SUBAREA LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" A 1.29 0.40 1.000 93
NATURAL POOR COVER
"BARREN" C 5.48 0.25 1.000 98
NATURAL POOR COVER
"BARREN" D 0.61 0.20 1.000 98
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.27
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 258.45 TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 8.09 AVERAGE FLOW DEPTH(FEET) = 3.58 TRAVEL TIME(MIN.) = 1.86 Tc(MIN.) = 12.99
SUBAREA AREA(ACRES) = 7.38 SUBAREA RUNOFF(CFS) = 21.97
EFFECTIVE AREA(ACRES) = 79.31 AREA-AVERAGED Fm(INCH/HR) = 0.23 AREA-AVERAGED Fp(INCH/HR) = 0.23 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 79.3 PEAK FLOW RATE(CFS) = 247.46
NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 3.51 FLOW VELOCITY(FEET/SEC.) = 8.01
LONGEST FLOWPATH FROM NODE 411.00 TO NODE 420.00 = 4661.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 420.00 TO NODE 420.00 IS CODE = 11 ---------------------------------------------------------------------------- >>>>>CONFLUENCE MEMORY BANK # 1 WITH THE MAIN-STREAM MEMORY<<<<< ============================================================================ ** MAIN STREAM CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 221.87 9.05 4.403 0.23( 0.23) 1.00 56.9 417.00
2 247.46 12.99 3.580 0.23( 0.23) 1.00 79.3 411.00
3 247.45 12.99 3.580 0.23( 0.23) 1.00 79.3 413.00
LONGEST FLOWPATH FROM NODE 411.00 TO NODE 420.00 = 4661.00 FEET. ** MEMORY BANK # 1 CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 201.35 11.00 3.939 0.23( 0.23) 1.00 60.4 406.00
2 200.94 11.06 3.927 0.23( 0.23) 1.00 60.5 800.00
3 197.74 11.44 3.851 0.23( 0.23) 1.00 60.7 400.00
LONGEST FLOWPATH FROM NODE 406.00 TO NODE 420.00 = 3979.00 FEET. ** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 408.41 9.05 4.403 0.23( 0.23) 1.00 106.6 417.00
2 435.84 11.00 3.939 0.23( 0.23) 1.00 128.3 406.00
3 435.82 11.06 3.927 0.23( 0.23) 1.00 128.7 800.00
4 435.10 11.44 3.851 0.23( 0.23) 1.00 131.2 400.00
5 430.37 12.99 3.580 0.23( 0.23) 1.00 140.0 411.00
6 430.36 12.99 3.580 0.23( 0.23) 1.00 140.0 413.00
TOTAL AREA(ACRES) = 140.0
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 435.84 Tc(MIN.) = 10.998
EFFECTIVE AREA(ACRES) = 128.33 AREA-AVERAGED Fm(INCH/HR) = 0.23 AREA-AVERAGED Fp(INCH/HR) = 0.23 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 140.0
LONGEST FLOWPATH FROM NODE 411.00 TO NODE 420.00 = 4661.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 420.00 TO NODE 420.00 IS CODE = 12 ---------------------------------------------------------------------------- >>>>>CLEAR MEMORY BANK # 1 <<<<<
============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 420.00 TO NODE 421.00 IS CODE = 51 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 612.75 DOWNSTREAM(FEET) = 574.00 CHANNEL LENGTH THRU SUBAREA(FEET) = 185.00 CHANNEL SLOPE = 0.2095 CHANNEL BASE(FEET) = 0.00 "Z" FACTOR = 2.500
MANNING'S FACTOR = 0.030 MAXIMUM DEPTH(FEET) = 10.00
CHANNEL FLOW THRU SUBAREA(CFS) = 435.84
FLOW VELOCITY(FEET/SEC.) = 25.70 FLOW DEPTH(FEET) = 2.60 TRAVEL TIME(MIN.) = 0.12 Tc(MIN.) = 11.12
LONGEST FLOWPATH FROM NODE 411.00 TO NODE 421.00 = 4846.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 423.00 TO NODE 424.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< ============================================================================ INITIAL SUBAREA FLOW-LENGTH(FEET) = 186.00
ELEVATION DATA: UPSTREAM(FEET) = 584.02 DOWNSTREAM(FEET) = 508.34 Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 5.082
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 6.130
SUBAREA Tc AND LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
NATURAL POOR COVER
"BARREN" A 2.50 0.40 1.000 93 5.08
NATURAL POOR COVER
"BARREN" C 0.32 0.25 1.000 98 5.08
NATURAL POOR COVER
"BARREN" D 1.77 0.20 1.000 98 5.08
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.31
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
SUBAREA RUNOFF(CFS) = 24.03
TOTAL AREA(ACRES) = 4.59 PEAK FLOW RATE(CFS) = 24.03
**************************************************************************** FLOW PROCESS FROM NODE 424.00 TO NODE 425.00 IS CODE = 51 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 508.34 DOWNSTREAM(FEET) = 492.05 CHANNEL LENGTH THRU SUBAREA(FEET) = 228.00 CHANNEL SLOPE = 0.0714 CHANNEL BASE(FEET) = 0.00 "Z" FACTOR = 2.500
MANNING'S FACTOR = 0.030 MAXIMUM DEPTH(FEET) = 10.00
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 5.851
SUBAREA LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" A 2.88 0.40 1.000 93
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 31.10
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 8.85 AVERAGE FLOW DEPTH(FEET) = 1.19 TRAVEL TIME(MIN.) = 0.43 Tc(MIN.) = 5.51
SUBAREA AREA(ACRES) = 2.88 SUBAREA RUNOFF(CFS) = 14.13
EFFECTIVE AREA(ACRES) = 7.47 AREA-AVERAGED Fm(INCH/HR) = 0.35 AREA-AVERAGED Fp(INCH/HR) = 0.35 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 7.5 PEAK FLOW RATE(CFS) = 37.01
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 1.26 FLOW VELOCITY(FEET/SEC.) = 9.27
LONGEST FLOWPATH FROM NODE 423.00 TO NODE 425.00 = 414.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 600.00 TO NODE 602.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< ============================================================================ INITIAL SUBAREA FLOW-LENGTH(FEET) = 241.00
ELEVATION DATA: UPSTREAM(FEET) = 547.51 DOWNSTREAM(FEET) = 485.30 Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 6.174
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 5.483
SUBAREA Tc AND LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
NATURAL POOR COVER
"BARREN" C 1.07 0.25 1.000 98 6.17
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
SUBAREA RUNOFF(CFS) = 5.04
TOTAL AREA(ACRES) = 1.07 PEAK FLOW RATE(CFS) = 5.04
**************************************************************************** FLOW PROCESS FROM NODE 602.00 TO NODE 605.00 IS CODE = 56 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 485.30 DOWNSTREAM(FEET) = 443.59 CHANNEL LENGTH THRU SUBAREA(FEET) = 259.00 CHANNEL SLOPE = 0.1610 GIVEN CHANNEL BASE(FEET) = 100.00 CHANNEL FREEBOARD(FEET) = 0.0 "Z" FACTOR = 2.500 MANNING'S FACTOR = 0.030
*ESTIMATED CHANNEL HEIGHT(FEET) = 0.04
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.676
SUBAREA LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" C 1.95 0.25 1.000 98
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 8.96
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 2.18 AVERAGE FLOW DEPTH(FEET) = 0.04 TRAVEL TIME(MIN.) = 1.98 Tc(MIN.) = 8.15
SUBAREA AREA(ACRES) = 1.95 SUBAREA RUNOFF(CFS) = 7.77
EFFECTIVE AREA(ACRES) = 3.02 AREA-AVERAGED Fm(INCH/HR) = 0.25 AREA-AVERAGED Fp(INCH/HR) = 0.25 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 3.0 PEAK FLOW RATE(CFS) = 12.03
GIVEN CHANNEL BASE(FEET) = 100.00 CHANNEL FREEBOARD(FEET) = 0.0 "Z" FACTOR = 2.500 MANNING'S FACTOR = 0.030
*ESTIMATED CHANNEL HEIGHT(FEET) = 0.05
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 0.05 FLOW VELOCITY(FEET/SEC.) = 2.47
LONGEST FLOWPATH FROM NODE 600.00 TO NODE 605.00 = 500.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 700.00 TO NODE 702.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< ============================================================================ INITIAL SUBAREA FLOW-LENGTH(FEET) = 315.00
ELEVATION DATA: UPSTREAM(FEET) = 742.54 DOWNSTREAM(FEET) = 615.00 Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 6.281
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 5.429
SUBAREA Tc AND LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
NATURAL POOR COVER
"BARREN" C 3.14 0.25 1.000 98 6.28
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
SUBAREA RUNOFF(CFS) = 14.64
TOTAL AREA(ACRES) = 3.14 PEAK FLOW RATE(CFS) = 14.64
**************************************************************************** FLOW PROCESS FROM NODE 702.00 TO NODE 705.00 IS CODE = 56 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 615.00 DOWNSTREAM(FEET) = 450.00 CHANNEL LENGTH THRU SUBAREA(FEET) = 1085.00 CHANNEL SLOPE = 0.1521 GIVEN CHANNEL BASE(FEET) = 10.00 CHANNEL FREEBOARD(FEET) = 0.0 "Z" FACTOR = 2.500 MANNING'S FACTOR = 0.030
*ESTIMATED CHANNEL HEIGHT(FEET) = 0.35
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.610
SUBAREA LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" C 8.41 0.25 1.000 98
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 31.23
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 8.72 AVERAGE FLOW DEPTH(FEET) = 0.33 TRAVEL TIME(MIN.) = 2.07 Tc(MIN.) = 8.36
SUBAREA AREA(ACRES) = 8.41 SUBAREA RUNOFF(CFS) = 33.00
EFFECTIVE AREA(ACRES) = 11.55 AREA-AVERAGED Fm(INCH/HR) = 0.25 AREA-AVERAGED Fp(INCH/HR) = 0.25 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 11.6 PEAK FLOW RATE(CFS) = 45.32
GIVEN CHANNEL BASE(FEET) = 10.00 CHANNEL FREEBOARD(FEET) = 0.0 "Z" FACTOR = 2.500 MANNING'S FACTOR = 0.030
*ESTIMATED CHANNEL HEIGHT(FEET) = 0.41
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 0.41 FLOW VELOCITY(FEET/SEC.) = 10.05
LONGEST FLOWPATH FROM NODE 700.00 TO NODE 705.00 = 1400.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 800.00 TO NODE 802.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< ============================================================================ INITIAL SUBAREA FLOW-LENGTH(FEET) = 312.00
ELEVATION DATA: UPSTREAM(FEET) = 874.02 DOWNSTREAM(FEET) = 780.00 Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 6.638
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 5.260
SUBAREA Tc AND LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
NATURAL POOR COVER
"BARREN" C 0.77 0.25 1.000 98 6.64
NATURAL POOR COVER
"BARREN" D 0.77 0.20 1.000 98 6.64
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.23
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
SUBAREA RUNOFF(CFS) = 7.02
TOTAL AREA(ACRES) = 1.55 PEAK FLOW RATE(CFS) = 7.02
**************************************************************************** FLOW PROCESS FROM NODE 802.00 TO NODE 805.00 IS CODE = 56 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 780.00 DOWNSTREAM(FEET) = 621.85 CHANNEL LENGTH THRU SUBAREA(FEET) = 784.00 CHANNEL SLOPE = 0.2017 GIVEN CHANNEL BASE(FEET) = 100.00 CHANNEL FREEBOARD(FEET) = 0.0 "Z" FACTOR = 2.500 MANNING'S FACTOR = 0.030
*ESTIMATED CHANNEL HEIGHT(FEET) = 0.06
* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 3.976
SUBAREA LOSS RATE DATA(AMC III):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" C 1.54 0.25 1.000 98
NATURAL POOR COVER
"BARREN" D 3.59 0.20 1.000 98
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.22
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 15.82
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 3.13 AVERAGE FLOW DEPTH(FEET) = 0.05 TRAVEL TIME(MIN.) = 4.18 Tc(MIN.) = 10.82
SUBAREA AREA(ACRES) = 5.13 SUBAREA RUNOFF(CFS) = 17.37
EFFECTIVE AREA(ACRES) = 6.68 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.22 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 6.7 PEAK FLOW RATE(CFS) = 22.60
GIVEN CHANNEL BASE(FEET) = 100.00 CHANNEL FREEBOARD(FEET) = 0.0 "Z" FACTOR = 2.500 MANNING'S FACTOR = 0.030
*ESTIMATED CHANNEL HEIGHT(FEET) = 0.06
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 0.06 FLOW VELOCITY(FEET/SEC.) = 3.53
LONGEST FLOWPATH FROM NODE 800.00 TO NODE 805.00 = 1096.00 FEET. ============================================================================ END OF STUDY SUMMARY:
TOTAL AREA(ACRES) = 6.7 TC(MIN.) = 10.82
EFFECTIVE AREA(ACRES) = 6.68 AREA-AVERAGED Fm(INCH/HR)= 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.22 AREA-AVERAGED Ap = 1.000 PEAK FLOW RATE(CFS) = 22.60
============================================================================ ============================================================================
END OF RATIONAL METHOD ANALYSIS
____________________________________________________________________________ ****************************************************************************
RATIONAL METHOD HYDROLOGY COMPUTER PROGRAM PACKAGE
(Reference: 1986 ORANGE COUNTY HYDROLOGY CRITERION)
(c) Copyright 1983-2014 Advanced Engineering Software (aes) Ver. 21.0 Release Date: 06/01/2014 License ID 1202
Analysis prepared by:
Huitt-Zollars, Inc.
2603 Main Street, Suite 400
Irvine, CA 92614
Tel - 949-988-5815
************************** DESCRIPTION OF STUDY ************************** * GYPSUM CANYON CEMETERY WITH OFFSITE FLOW *
* PROPOSED CONDITION - 2 YR STORM EVENT *
* HHTUN REV CGULLIXSON *
************************************************************************** FILE NAME: GCP_2.DAT
TIME/DATE OF STUDY: 10:02 10/04/2023
============================================================================ USER SPECIFIED HYDROLOGY AND HYDRAULIC MODEL INFORMATION:
============================================================================ --*TIME-OF-CONCENTRATION MODEL*--
USER SPECIFIED STORM EVENT(YEAR) = 2.00
SPECIFIED MINIMUM PIPE SIZE(INCH) = 12.00
SPECIFIED PERCENT OF GRADIENTS(DECIMAL) TO USE FOR FRICTION SLOPE = 0.90 *DATA BANK RAINFALL USED*
*ANTECEDENT MOISTURE CONDITION (AMC) I ASSUMED FOR RATIONAL METHOD* *USER-DEFINED STREET-SECTIONS FOR COUPLED PIPEFLOW AND STREETFLOW MODEL* HALF- CROWN TO STREET-CROSSFALL: CURB GUTTER-GEOMETRIES: MANNING
WIDTH CROSSFALL IN- / OUT-/PARK- HEIGHT WIDTH LIP HIKE FACTOR NO. (FT) (FT) SIDE / SIDE/ WAY (FT) (FT) (FT) (FT) (n)
=== ===== ========= ================= ====== ===== ====== ===== ======= 1 32.0 16.0 0.018/0.018/0.020 0.67 2.00 0.0312 0.167 0.0150 GLOBAL STREET FLOW-DEPTH CONSTRAINTS:
1. Relative Flow-Depth = 0.00 FEET
as (Maximum Allowable Street Flow Depth) - (Top-of-Curb)
2. (Depth)*(Velocity) Constraint = 6.0 (FT*FT/S)
*SIZE PIPE WITH A FLOW CAPACITY GREATER THAN
OR EQUAL TO THE UPSTREAM TRIBUTARY PIPE.*
*USER-SPECIFIED MINIMUM TOPOGRAPHIC SLOPE ADJUSTMENT NOT SELECTED **************************************************************************** FLOW PROCESS FROM NODE 100.00 TO NODE 105.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< ============================================================================ INITIAL SUBAREA FLOW-LENGTH(FEET) = 103.00
ELEVATION DATA: UPSTREAM(FEET) = 450.02 DOWNSTREAM(FEET) = 417.40 Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 5.000
* 2 YEAR RAINFALL INTENSITY(INCH/HR) = 2.264
SUBAREA Tc AND LOSS RATE DATA(AMC I ):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
NATURAL POOR COVER
"BARREN" C 4.20 0.25 1.000 80 5.00
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
SUBAREA RUNOFF(CFS) = 7.61
TOTAL AREA(ACRES) = 4.20 PEAK FLOW RATE(CFS) = 7.61
**************************************************************************** FLOW PROCESS FROM NODE 200.00 TO NODE 205.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< ============================================================================ INITIAL SUBAREA FLOW-LENGTH(FEET) = 389.00
ELEVATION DATA: UPSTREAM(FEET) = 443.03 DOWNSTREAM(FEET) = 406.00 Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 9.129
* 2 YEAR RAINFALL INTENSITY(INCH/HR) = 1.602
SUBAREA Tc AND LOSS RATE DATA(AMC I ):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
NATURAL POOR COVER
"BARREN" A 0.62 0.40 1.000 61 9.13
NATURAL POOR COVER
"BARREN" B 0.27 0.30 1.000 72 9.13
NATURAL POOR COVER
"BARREN" C 0.35 0.25 1.000 80 9.13
NATURAL POOR COVER
"BARREN" D 7.62 0.20 1.000 83 9.13
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.22
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
SUBAREA RUNOFF(CFS) = 11.03
TOTAL AREA(ACRES) = 8.86 PEAK FLOW RATE(CFS) = 11.03
**************************************************************************** FLOW PROCESS FROM NODE 300.00 TO NODE 301.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< ============================================================================ INITIAL SUBAREA FLOW-LENGTH(FEET) = 235.00
ELEVATION DATA: UPSTREAM(FEET) = 642.77 DOWNSTREAM(FEET) = 562.32 Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 7.769
* 2 YEAR RAINFALL INTENSITY(INCH/HR) = 1.758
SUBAREA Tc AND LOSS RATE DATA(AMC I ):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
URBAN GOOD COVER
"TURF" - 0.69 0.25 0.900 83 7.77
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.900
SUBAREA RUNOFF(CFS) = 0.95
TOTAL AREA(ACRES) = 0.69 PEAK FLOW RATE(CFS) = 0.95
**************************************************************************** FLOW PROCESS FROM NODE 301.00 TO NODE 305.00 IS CODE = 51 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 562.32 DOWNSTREAM(FEET) = 474.58 CHANNEL LENGTH THRU SUBAREA(FEET) = 226.00 CHANNEL SLOPE = 0.3882 CHANNEL BASE(FEET) = 0.00 "Z" FACTOR = 3.000
MANNING'S FACTOR = 0.013 MAXIMUM DEPTH(FEET) = 10.00
* 2 YEAR RAINFALL INTENSITY(INCH/HR) = 1.726
SUBAREA LOSS RATE DATA(AMC I ):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
USER-DEFINED - 1.29 0.25 0.900 -
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.900
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 1.82
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 15.01 AVERAGE FLOW DEPTH(FEET) = 0.20 TRAVEL TIME(MIN.) = 0.25 Tc(MIN.) = 8.02
SUBAREA AREA(ACRES) = 1.29 SUBAREA RUNOFF(CFS) = 1.74
EFFECTIVE AREA(ACRES) = 1.98 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.25 AREA-AVERAGED Ap = 0.90 TOTAL AREA(ACRES) = 2.0 PEAK FLOW RATE(CFS) = 2.68
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 0.23 FLOW VELOCITY(FEET/SEC.) = 16.33
LONGEST FLOWPATH FROM NODE 300.00 TO NODE 305.00 = 461.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 305.00 TO NODE 306.00 IS CODE = 51 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 474.58 DOWNSTREAM(FEET) = 468.10 CHANNEL LENGTH THRU SUBAREA(FEET) = 356.00 CHANNEL SLOPE = 0.0182 CHANNEL BASE(FEET) = 0.00 "Z" FACTOR = 3.000
MANNING'S FACTOR = 0.013 MAXIMUM DEPTH(FEET) = 10.00
CHANNEL FLOW THRU SUBAREA(CFS) = 2.68
FLOW VELOCITY(FEET/SEC.) = 5.18 FLOW DEPTH(FEET) = 0.41 TRAVEL TIME(MIN.) = 1.15 Tc(MIN.) = 9.16
LONGEST FLOWPATH FROM NODE 300.00 TO NODE 306.00 = 817.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 306.00 TO NODE 306.00 IS CODE = 1 ---------------------------------------------------------------------------- >>>>>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE<<<<<
============================================================================ TOTAL NUMBER OF STREAMS = 2
CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 1 ARE:
TIME OF CONCENTRATION(MIN.) = 9.16
RAINFALL INTENSITY(INCH/HR) = 1.60
AREA-AVERAGED Fm(INCH/HR) = 0.22
AREA-AVERAGED Fp(INCH/HR) = 0.25
AREA-AVERAGED Ap = 0.90
EFFECTIVE STREAM AREA(ACRES) = 1.98
TOTAL STREAM AREA(ACRES) = 1.98
PEAK FLOW RATE(CFS) AT CONFLUENCE = 2.68
**************************************************************************** FLOW PROCESS FROM NODE 315.00 TO NODE 316.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< ============================================================================ INITIAL SUBAREA FLOW-LENGTH(FEET) = 243.00
ELEVATION DATA: UPSTREAM(FEET) = 648.21 DOWNSTREAM(FEET) = 563.05 Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 7.836
* 2 YEAR RAINFALL INTENSITY(INCH/HR) = 1.749
SUBAREA Tc AND LOSS RATE DATA(AMC I ):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
URBAN GOOD COVER
"TURF" - 3.55 0.25 0.900 83 7.84
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.900
SUBAREA RUNOFF(CFS) = 4.87
TOTAL AREA(ACRES) = 3.55 PEAK FLOW RATE(CFS) = 4.87
**************************************************************************** FLOW PROCESS FROM NODE 316.00 TO NODE 306.00 IS CODE = 51 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 563.05 DOWNSTREAM(FEET) = 468.10 CHANNEL LENGTH THRU SUBAREA(FEET) = 442.00 CHANNEL SLOPE = 0.2148 CHANNEL BASE(FEET) = 0.00 "Z" FACTOR = 3.000
MANNING'S FACTOR = 0.013 MAXIMUM DEPTH(FEET) = 10.00
* 2 YEAR RAINFALL INTENSITY(INCH/HR) = 1.696
SUBAREA LOSS RATE DATA(AMC I ):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
USER-DEFINED - 5.08 0.25 0.900 -
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.900
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 8.24
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 17.19 AVERAGE FLOW DEPTH(FEET) = 0.40 TRAVEL TIME(MIN.) = 0.43 Tc(MIN.) = 8.26
SUBAREA AREA(ACRES) = 5.08 SUBAREA RUNOFF(CFS) = 6.73
EFFECTIVE AREA(ACRES) = 8.63 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.25 AREA-AVERAGED Ap = 0.90 TOTAL AREA(ACRES) = 8.6 PEAK FLOW RATE(CFS) = 11.43
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 0.45 FLOW VELOCITY(FEET/SEC.) = 19.04
LONGEST FLOWPATH FROM NODE 315.00 TO NODE 306.00 = 685.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 306.00 TO NODE 306.00 IS CODE = 1 ---------------------------------------------------------------------------- >>>>>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE<<<<<
>>>>>AND COMPUTE VARIOUS CONFLUENCED STREAM VALUES<<<<< ============================================================================ TOTAL NUMBER OF STREAMS = 2
CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 2 ARE:
TIME OF CONCENTRATION(MIN.) = 8.26
RAINFALL INTENSITY(INCH/HR) = 1.70
AREA-AVERAGED Fm(INCH/HR) = 0.22
AREA-AVERAGED Fp(INCH/HR) = 0.25
AREA-AVERAGED Ap = 0.90
EFFECTIVE STREAM AREA(ACRES) = 8.63
TOTAL STREAM AREA(ACRES) = 8.63
PEAK FLOW RATE(CFS) AT CONFLUENCE = 11.43
** CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 2.68 9.16 1.599 0.25( 0.22) 0.90 2.0 300.00
2 11.43 8.26 1.696 0.25( 0.22) 0.90 8.6 315.00
RAINFALL INTENSITY AND TIME OF CONCENTRATION RATIO
CONFLUENCE FORMULA USED FOR 2 STREAMS.
** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 14.01 8.26 1.696 0.25( 0.22) 0.90 10.4 315.00
2 13.35 9.16 1.599 0.25( 0.22) 0.90 10.6 300.00
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 14.01 Tc(MIN.) = 8.26
EFFECTIVE AREA(ACRES) = 10.42 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.25 AREA-AVERAGED Ap = 0.90 TOTAL AREA(ACRES) = 10.6
LONGEST FLOWPATH FROM NODE 300.00 TO NODE 306.00 = 817.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 306.00 TO NODE 310.00 IS CODE = 51 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 468.10 DOWNSTREAM(FEET) = 450.93 CHANNEL LENGTH THRU SUBAREA(FEET) = 828.00 CHANNEL SLOPE = 0.0207 CHANNEL BASE(FEET) = 0.00 "Z" FACTOR = 3.000
MANNING'S FACTOR = 0.013 MAXIMUM DEPTH(FEET) = 10.00
* 2 YEAR RAINFALL INTENSITY(INCH/HR) = 1.535
SUBAREA LOSS RATE DATA(AMC I ):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
USER-DEFINED - 5.79 0.25 0.900 -
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.900
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 17.43
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 8.78 AVERAGE FLOW DEPTH(FEET) = 0.81 TRAVEL TIME(MIN.) = 1.57 Tc(MIN.) = 9.84
SUBAREA AREA(ACRES) = 5.79 SUBAREA RUNOFF(CFS) = 6.83
EFFECTIVE AREA(ACRES) = 16.21 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.25 AREA-AVERAGED Ap = 0.90 TOTAL AREA(ACRES) = 16.4 PEAK FLOW RATE(CFS) = 19.11
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 0.84 FLOW VELOCITY(FEET/SEC.) = 8.94
LONGEST FLOWPATH FROM NODE 300.00 TO NODE 310.00 = 1645.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 310.00 TO NODE 325.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 446.99 DOWNSTREAM(FEET) = 442.15 FLOW LENGTH(FEET) = 949.00 MANNING'S N = 0.013
DEPTH OF FLOW IN 27.0 INCH PIPE IS 20.2 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 5.98
ESTIMATED PIPE DIAMETER(INCH) = 27.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 19.11
PIPE TRAVEL TIME(MIN.) = 2.64 Tc(MIN.) = 12.48
LONGEST FLOWPATH FROM NODE 300.00 TO NODE 325.00 = 2594.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 310.00 TO NODE 325.00 IS CODE = 81 ---------------------------------------------------------------------------- >>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================ MAINLINE Tc(MIN.) = 12.48
* 2 YEAR RAINFALL INTENSITY(INCH/HR) = 1.339
SUBAREA LOSS RATE DATA(AMC I ):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
USER-DEFINED - 10.81 0.25 0.900 -
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.900
SUBAREA AREA(ACRES) = 10.81 SUBAREA RUNOFF(CFS) = 10.84 EFFECTIVE AREA(ACRES) = 27.02 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.25 AREA-AVERAGED Ap = 0.90 TOTAL AREA(ACRES) = 27.2 PEAK FLOW RATE(CFS) = 27.09
**************************************************************************** FLOW PROCESS FROM NODE 325.00 TO NODE 330.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 442.15 DOWNSTREAM(FEET) = 435.30 FLOW LENGTH(FEET) = 1427.00 MANNING'S N = 0.013
DEPTH OF FLOW IN 33.0 INCH PIPE IS 21.9 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 6.47
ESTIMATED PIPE DIAMETER(INCH) = 33.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 27.09
PIPE TRAVEL TIME(MIN.) = 3.68 Tc(MIN.) = 16.16
LONGEST FLOWPATH FROM NODE 300.00 TO NODE 330.00 = 4021.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 325.00 TO NODE 330.00 IS CODE = 81 ---------------------------------------------------------------------------- >>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================ MAINLINE Tc(MIN.) = 16.16
* 2 YEAR RAINFALL INTENSITY(INCH/HR) = 1.155
SUBAREA LOSS RATE DATA(AMC I ):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
USER-DEFINED - 15.23 0.25 0.900 -
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.900
SUBAREA AREA(ACRES) = 15.23 SUBAREA RUNOFF(CFS) = 12.74 EFFECTIVE AREA(ACRES) = 42.25 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.25 AREA-AVERAGED Ap = 0.90 TOTAL AREA(ACRES) = 42.4 PEAK FLOW RATE(CFS) = 35.35
**************************************************************************** FLOW PROCESS FROM NODE 330.00 TO NODE 330.00 IS CODE = 10 ---------------------------------------------------------------------------- >>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 1 <<<<< ============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 340.00 TO NODE 341.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< ============================================================================ INITIAL SUBAREA FLOW-LENGTH(FEET) = 227.00
ELEVATION DATA: UPSTREAM(FEET) = 497.15 DOWNSTREAM(FEET) = 490.66 Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 12.588
* 2 YEAR RAINFALL INTENSITY(INCH/HR) = 1.332
SUBAREA Tc AND LOSS RATE DATA(AMC I ):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
URBAN GOOD COVER
"TURF" - 0.64 0.25 0.900 83 12.59
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.900
SUBAREA RUNOFF(CFS) = 0.64
TOTAL AREA(ACRES) = 0.64 PEAK FLOW RATE(CFS) = 0.64
**************************************************************************** FLOW PROCESS FROM NODE 341.00 TO NODE 342.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 486.64 DOWNSTREAM(FEET) = 469.80 FLOW LENGTH(FEET) = 405.00 MANNING'S N = 0.013
ESTIMATED PIPE DIAMETER(INCH) INCREASED TO 12.000
DEPTH OF FLOW IN 12.0 INCH PIPE IS 2.5 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 5.47
ESTIMATED PIPE DIAMETER(INCH) = 12.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 0.64
PIPE TRAVEL TIME(MIN.) = 1.23 Tc(MIN.) = 13.82
LONGEST FLOWPATH FROM NODE 340.00 TO NODE 342.00 = 632.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 341.00 TO NODE 342.00 IS CODE = 81 ---------------------------------------------------------------------------- >>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================ MAINLINE Tc(MIN.) = 13.82
* 2 YEAR RAINFALL INTENSITY(INCH/HR) = 1.263
SUBAREA LOSS RATE DATA(AMC I ):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
USER-DEFINED - 1.68 0.25 0.900 -
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.900
SUBAREA AREA(ACRES) = 1.68 SUBAREA RUNOFF(CFS) = 1.57
EFFECTIVE AREA(ACRES) = 2.32 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.25 AREA-AVERAGED Ap = 0.90 TOTAL AREA(ACRES) = 2.3 PEAK FLOW RATE(CFS) = 2.17
**************************************************************************** FLOW PROCESS FROM NODE 342.00 TO NODE 342.00 IS CODE = 81 ---------------------------------------------------------------------------- >>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================ MAINLINE Tc(MIN.) = 13.82
* 2 YEAR RAINFALL INTENSITY(INCH/HR) = 1.263
SUBAREA LOSS RATE DATA(AMC I ):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
USER-DEFINED - 2.86 0.25 0.900 -
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.900
SUBAREA AREA(ACRES) = 2.86 SUBAREA RUNOFF(CFS) = 2.67
EFFECTIVE AREA(ACRES) = 5.18 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.25 AREA-AVERAGED Ap = 0.90 TOTAL AREA(ACRES) = 5.2 PEAK FLOW RATE(CFS) = 4.84
**************************************************************************** FLOW PROCESS FROM NODE 342.00 TO NODE 345.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 469.80 DOWNSTREAM(FEET) = 466.71 FLOW LENGTH(FEET) = 424.00 MANNING'S N = 0.013
DEPTH OF FLOW IN 15.0 INCH PIPE IS 11.4 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 4.84
ESTIMATED PIPE DIAMETER(INCH) = 15.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 4.84
PIPE TRAVEL TIME(MIN.) = 1.46 Tc(MIN.) = 15.28
LONGEST FLOWPATH FROM NODE 340.00 TO NODE 345.00 = 1056.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 342.00 TO NODE 345.00 IS CODE = 81 ---------------------------------------------------------------------------- >>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================ MAINLINE Tc(MIN.) = 15.28
* 2 YEAR RAINFALL INTENSITY(INCH/HR) = 1.192
SUBAREA LOSS RATE DATA(AMC I ):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
USER-DEFINED - 1.76 0.25 0.900 -
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.900
SUBAREA AREA(ACRES) = 1.76 SUBAREA RUNOFF(CFS) = 1.53
EFFECTIVE AREA(ACRES) = 6.94 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.25 AREA-AVERAGED Ap = 0.90 TOTAL AREA(ACRES) = 6.9 PEAK FLOW RATE(CFS) = 6.04
**************************************************************************** FLOW PROCESS FROM NODE 345.00 TO NODE 350.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 466.71 DOWNSTREAM(FEET) = 460.61 FLOW LENGTH(FEET) = 1241.00 MANNING'S N = 0.013
DEPTH OF FLOW IN 18.0 INCH PIPE IS 12.9 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 4.45
ESTIMATED PIPE DIAMETER(INCH) = 18.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 6.04
PIPE TRAVEL TIME(MIN.) = 4.65 Tc(MIN.) = 19.93
LONGEST FLOWPATH FROM NODE 340.00 TO NODE 350.00 = 2297.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 345.00 TO NODE 350.00 IS CODE = 81 ---------------------------------------------------------------------------- >>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================ MAINLINE Tc(MIN.) = 19.93
* 2 YEAR RAINFALL INTENSITY(INCH/HR) = 1.024
SUBAREA LOSS RATE DATA(AMC I ):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
USER-DEFINED - 4.17 0.25 0.900 -
USER-DEFINED - 9.20 0.20 0.900 -
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.22
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.900
SUBAREA AREA(ACRES) = 13.37 SUBAREA RUNOFF(CFS) = 9.98
EFFECTIVE AREA(ACRES) = 20.31 AREA-AVERAGED Fm(INCH/HR) = 0.20 AREA-AVERAGED Fp(INCH/HR) = 0.23 AREA-AVERAGED Ap = 0.90 TOTAL AREA(ACRES) = 20.3 PEAK FLOW RATE(CFS) = 14.97
**************************************************************************** FLOW PROCESS FROM NODE 350.00 TO NODE 350.00 IS CODE = 81 ---------------------------------------------------------------------------- >>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================ MAINLINE Tc(MIN.) = 19.93
* 2 YEAR RAINFALL INTENSITY(INCH/HR) = 1.024
SUBAREA LOSS RATE DATA(AMC I ):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
USER-DEFINED - 1.36 0.20 0.900 -
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.20
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.900
SUBAREA AREA(ACRES) = 1.36 SUBAREA RUNOFF(CFS) = 1.03
EFFECTIVE AREA(ACRES) = 21.67 AREA-AVERAGED Fm(INCH/HR) = 0.20 AREA-AVERAGED Fp(INCH/HR) = 0.23 AREA-AVERAGED Ap = 0.90 TOTAL AREA(ACRES) = 21.7 PEAK FLOW RATE(CFS) = 16.01
**************************************************************************** FLOW PROCESS FROM NODE 350.00 TO NODE 330.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 460.61 DOWNSTREAM(FEET) = 435.30 FLOW LENGTH(FEET) = 431.00 MANNING'S N = 0.013
DEPTH OF FLOW IN 18.0 INCH PIPE IS 10.7 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 14.61
ESTIMATED PIPE DIAMETER(INCH) = 18.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 16.01
PIPE TRAVEL TIME(MIN.) = 0.49 Tc(MIN.) = 20.42
LONGEST FLOWPATH FROM NODE 340.00 TO NODE 330.00 = 2728.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 330.00 TO NODE 330.00 IS CODE = 11 ---------------------------------------------------------------------------- >>>>>CONFLUENCE MEMORY BANK # 1 WITH THE MAIN-STREAM MEMORY<<<<< ============================================================================ ** MAIN STREAM CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 16.01 20.42 1.009 0.23( 0.20) 0.90 21.7 340.00
LONGEST FLOWPATH FROM NODE 340.00 TO NODE 330.00 = 2728.00 FEET. ** MEMORY BANK # 1 CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 35.35 16.16 1.155 0.25( 0.22) 0.90 42.2 315.00
2 33.93 17.22 1.113 0.25( 0.22) 0.90 42.4 300.00
LONGEST FLOWPATH FROM NODE 300.00 TO NODE 330.00 = 4021.00 FEET. ** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 50.29 16.16 1.155 0.24( 0.22) 0.90 59.4 315.00
2 49.16 17.22 1.113 0.24( 0.22) 0.90 60.7 300.00
3 45.97 20.42 1.009 0.24( 0.22) 0.90 64.1 340.00
TOTAL AREA(ACRES) = 64.1
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 50.29 Tc(MIN.) = 16.157
EFFECTIVE AREA(ACRES) = 59.39 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.24 AREA-AVERAGED Ap = 0.90 TOTAL AREA(ACRES) = 64.1
LONGEST FLOWPATH FROM NODE 300.00 TO NODE 330.00 = 4021.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 330.00 TO NODE 330.00 IS CODE = 12 ---------------------------------------------------------------------------- >>>>>CLEAR MEMORY BANK # 1 <<<<<
============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 330.00 TO NODE 331.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 435.30 DOWNSTREAM(FEET) = 435.08 FLOW LENGTH(FEET) = 45.00 MANNING'S N = 0.013
DEPTH OF FLOW IN 39.0 INCH PIPE IS 29.4 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 7.49
ESTIMATED PIPE DIAMETER(INCH) = 39.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 50.29
PIPE TRAVEL TIME(MIN.) = 0.10 Tc(MIN.) = 16.26
LONGEST FLOWPATH FROM NODE 300.00 TO NODE 331.00 = 4066.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 331.00 TO NODE 331.00 IS CODE = 10 ---------------------------------------------------------------------------- >>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 1 <<<<< ============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 360.00 TO NODE 361.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< ============================================================================ INITIAL SUBAREA FLOW-LENGTH(FEET) = 330.00
ELEVATION DATA: UPSTREAM(FEET) = 642.10 DOWNSTREAM(FEET) = 554.86 Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 9.371
* 2 YEAR RAINFALL INTENSITY(INCH/HR) = 1.578
SUBAREA Tc AND LOSS RATE DATA(AMC I ):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
URBAN GOOD COVER
"TURF" - 4.70 0.25 0.900 83 9.37
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.900
SUBAREA RUNOFF(CFS) = 5.73
TOTAL AREA(ACRES) = 4.70 PEAK FLOW RATE(CFS) = 5.73
**************************************************************************** FLOW PROCESS FROM NODE 361.00 TO NODE 362.00 IS CODE = 51 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 554.86 DOWNSTREAM(FEET) = 497.36 CHANNEL LENGTH THRU SUBAREA(FEET) = 346.00 CHANNEL SLOPE = 0.1662 CHANNEL BASE(FEET) = 0.00 "Z" FACTOR = 3.000
MANNING'S FACTOR = 0.013 MAXIMUM DEPTH(FEET) = 10.00
* 2 YEAR RAINFALL INTENSITY(INCH/HR) = 1.543
SUBAREA LOSS RATE DATA(AMC I ):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
USER-DEFINED - 3.17 0.25 0.900 -
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.900
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 7.61
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 15.29 AVERAGE FLOW DEPTH(FEET) = 0.41 TRAVEL TIME(MIN.) = 0.38 Tc(MIN.) = 9.75
SUBAREA AREA(ACRES) = 3.17 SUBAREA RUNOFF(CFS) = 3.76
EFFECTIVE AREA(ACRES) = 7.87 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.25 AREA-AVERAGED Ap = 0.90 TOTAL AREA(ACRES) = 7.9 PEAK FLOW RATE(CFS) = 9.34
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 0.44 FLOW VELOCITY(FEET/SEC.) = 16.24
LONGEST FLOWPATH FROM NODE 360.00 TO NODE 362.00 = 676.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 362.00 TO NODE 365.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 494.42 DOWNSTREAM(FEET) = 490.67 FLOW LENGTH(FEET) = 749.00 MANNING'S N = 0.013
DEPTH OF FLOW IN 21.0 INCH PIPE IS 15.3 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 4.99
ESTIMATED PIPE DIAMETER(INCH) = 21.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 9.34
PIPE TRAVEL TIME(MIN.) = 2.50 Tc(MIN.) = 12.25
LONGEST FLOWPATH FROM NODE 360.00 TO NODE 365.00 = 1425.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 362.00 TO NODE 365.00 IS CODE = 81 ---------------------------------------------------------------------------- >>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================ MAINLINE Tc(MIN.) = 12.25
* 2 YEAR RAINFALL INTENSITY(INCH/HR) = 1.353
SUBAREA LOSS RATE DATA(AMC I ):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
USER-DEFINED - 5.36 0.25 0.500 -
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.500
SUBAREA AREA(ACRES) = 5.36 SUBAREA RUNOFF(CFS) = 5.93
EFFECTIVE AREA(ACRES) = 13.23 AREA-AVERAGED Fm(INCH/HR) = 0.18 AREA-AVERAGED Fp(INCH/HR) = 0.25 AREA-AVERAGED Ap = 0.74 TOTAL AREA(ACRES) = 13.2 PEAK FLOW RATE(CFS) = 13.92
**************************************************************************** FLOW PROCESS FROM NODE 365.00 TO NODE 376.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 490.67 DOWNSTREAM(FEET) = 479.26 FLOW LENGTH(FEET) = 253.00 MANNING'S N = 0.013
DEPTH OF FLOW IN 18.0 INCH PIPE IS 10.7 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 12.79
ESTIMATED PIPE DIAMETER(INCH) = 18.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 13.92
PIPE TRAVEL TIME(MIN.) = 0.33 Tc(MIN.) = 12.58
LONGEST FLOWPATH FROM NODE 360.00 TO NODE 376.00 = 1678.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 376.00 TO NODE 376.00 IS CODE = 10 ---------------------------------------------------------------------------- >>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 2 <<<<< ============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 370.00 TO NODE 371.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< ============================================================================ INITIAL SUBAREA FLOW-LENGTH(FEET) = 265.00
ELEVATION DATA: UPSTREAM(FEET) = 632.00 DOWNSTREAM(FEET) = 575.00 Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 8.945
* 2 YEAR RAINFALL INTENSITY(INCH/HR) = 1.621
SUBAREA Tc AND LOSS RATE DATA(AMC I ):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
URBAN GOOD COVER
"TURF" - 0.74 0.25 0.900 83 8.94
URBAN GOOD COVER
"TURF" - 2.23 0.20 0.900 83 8.94
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.21
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.900
SUBAREA RUNOFF(CFS) = 3.82
TOTAL AREA(ACRES) = 2.97 PEAK FLOW RATE(CFS) = 3.82
**************************************************************************** FLOW PROCESS FROM NODE 371.00 TO NODE 375.00 IS CODE = 51 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 575.00 DOWNSTREAM(FEET) = 498.11 CHANNEL LENGTH THRU SUBAREA(FEET) = 285.00 CHANNEL SLOPE = 0.2698 CHANNEL BASE(FEET) = 0.00 "Z" FACTOR = 3.000
MANNING'S FACTOR = 0.013 MAXIMUM DEPTH(FEET) = 10.00
* 2 YEAR RAINFALL INTENSITY(INCH/HR) = 1.593
SUBAREA LOSS RATE DATA(AMC I ):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
USER-DEFINED - 2.37 0.25 0.900 -
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.900
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 5.28
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 16.84 AVERAGE FLOW DEPTH(FEET) = 0.32 TRAVEL TIME(MIN.) = 0.28 Tc(MIN.) = 9.23
SUBAREA AREA(ACRES) = 2.37 SUBAREA RUNOFF(CFS) = 2.92
EFFECTIVE AREA(ACRES) = 5.34 AREA-AVERAGED Fm(INCH/HR) = 0.21 AREA-AVERAGED Fp(INCH/HR) = 0.23 AREA-AVERAGED Ap = 0.90 TOTAL AREA(ACRES) = 5.3 PEAK FLOW RATE(CFS) = 6.66
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 0.35 FLOW VELOCITY(FEET/SEC.) = 17.74
LONGEST FLOWPATH FROM NODE 370.00 TO NODE 375.00 = 550.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 375.00 TO NODE 376.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 494.11 DOWNSTREAM(FEET) = 479.26 FLOW LENGTH(FEET) = 219.00 MANNING'S N = 0.013
DEPTH OF FLOW IN 12.0 INCH PIPE IS 7.8 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 12.32
ESTIMATED PIPE DIAMETER(INCH) = 12.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 6.66
PIPE TRAVEL TIME(MIN.) = 0.30 Tc(MIN.) = 9.52
LONGEST FLOWPATH FROM NODE 370.00 TO NODE 376.00 = 769.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 376.00 TO NODE 376.00 IS CODE = 11 ---------------------------------------------------------------------------- >>>>>CONFLUENCE MEMORY BANK # 2 WITH THE MAIN-STREAM MEMORY<<<<< ============================================================================ ** MAIN STREAM CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 6.66 9.52 1.564 0.23( 0.21) 0.90 5.3 370.00
LONGEST FLOWPATH FROM NODE 370.00 TO NODE 376.00 = 769.00 FEET. ** MEMORY BANK # 2 CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 13.92 12.58 1.333 0.25( 0.18) 0.74 13.2 360.00
LONGEST FLOWPATH FROM NODE 360.00 TO NODE 376.00 = 1678.00 FEET. ** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 19.32 9.52 1.564 0.24( 0.19) 0.79 15.4 370.00
2 19.45 12.58 1.333 0.24( 0.19) 0.78 18.6 360.00
TOTAL AREA(ACRES) = 18.6
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 19.45 Tc(MIN.) = 12.580
EFFECTIVE AREA(ACRES) = 18.57 AREA-AVERAGED Fm(INCH/HR) = 0.19 AREA-AVERAGED Fp(INCH/HR) = 0.24 AREA-AVERAGED Ap = 0.78 TOTAL AREA(ACRES) = 18.6
LONGEST FLOWPATH FROM NODE 360.00 TO NODE 376.00 = 1678.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 376.00 TO NODE 376.00 IS CODE = 12 ---------------------------------------------------------------------------- >>>>>CLEAR MEMORY BANK # 2 <<<<<
============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 376.00 TO NODE 380.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 479.26 DOWNSTREAM(FEET) = 456.49 FLOW LENGTH(FEET) = 508.00 MANNING'S N = 0.013
DEPTH OF FLOW IN 18.0 INCH PIPE IS 13.6 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 13.55
ESTIMATED PIPE DIAMETER(INCH) = 18.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 19.45
PIPE TRAVEL TIME(MIN.) = 0.62 Tc(MIN.) = 13.21
LONGEST FLOWPATH FROM NODE 360.00 TO NODE 380.00 = 2186.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 380.00 TO NODE 380.00 IS CODE = 10 ---------------------------------------------------------------------------- >>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 2 <<<<< ============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 381.00 TO NODE 382.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< ============================================================================ INITIAL SUBAREA FLOW-LENGTH(FEET) = 330.00
ELEVATION DATA: UPSTREAM(FEET) = 565.33 DOWNSTREAM(FEET) = 497.83 Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 9.864
* 2 YEAR RAINFALL INTENSITY(INCH/HR) = 1.533
SUBAREA Tc AND LOSS RATE DATA(AMC I ):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
URBAN FAIR COVER
"TURF" - 0.16 0.25 0.900 83 9.86
URBAN FAIR COVER
"TURF" - 0.48 0.25 0.900 83 9.86
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.900
SUBAREA RUNOFF(CFS) = 0.75
TOTAL AREA(ACRES) = 0.64 PEAK FLOW RATE(CFS) = 0.75
**************************************************************************** FLOW PROCESS FROM NODE 382.00 TO NODE 380.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 492.83 DOWNSTREAM(FEET) = 456.49 FLOW LENGTH(FEET) = 1146.00 MANNING'S N = 0.013
ESTIMATED PIPE DIAMETER(INCH) INCREASED TO 12.000
DEPTH OF FLOW IN 12.0 INCH PIPE IS 2.9 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 5.23
ESTIMATED PIPE DIAMETER(INCH) = 12.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 0.75
PIPE TRAVEL TIME(MIN.) = 3.65 Tc(MIN.) = 13.52
LONGEST FLOWPATH FROM NODE 381.00 TO NODE 380.00 = 1476.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 382.00 TO NODE 380.00 IS CODE = 81 ---------------------------------------------------------------------------- >>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================ MAINLINE Tc(MIN.) = 13.52
* 2 YEAR RAINFALL INTENSITY(INCH/HR) = 1.279
SUBAREA LOSS RATE DATA(AMC I ):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
USER-DEFINED - 3.35 0.25 0.900 -
USER-DEFINED - 10.06 0.25 0.900 -
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.900
SUBAREA AREA(ACRES) = 13.41 SUBAREA RUNOFF(CFS) = 12.72 EFFECTIVE AREA(ACRES) = 14.05 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.25 AREA-AVERAGED Ap = 0.90 TOTAL AREA(ACRES) = 14.1 PEAK FLOW RATE(CFS) = 13.33
**************************************************************************** FLOW PROCESS FROM NODE 380.00 TO NODE 380.00 IS CODE = 11 ---------------------------------------------------------------------------- >>>>>CONFLUENCE MEMORY BANK # 2 WITH THE MAIN-STREAM MEMORY<<<<< ============================================================================ ** MAIN STREAM CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 13.33 13.52 1.279 0.25( 0.22) 0.90 14.1 381.00
LONGEST FLOWPATH FROM NODE 381.00 TO NODE 380.00 = 1476.00 FEET. ** MEMORY BANK # 2 CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 19.32 10.15 1.508 0.24( 0.19) 0.79 15.4 370.00
2 19.45 13.21 1.296 0.24( 0.19) 0.78 18.6 360.00
LONGEST FLOWPATH FROM NODE 360.00 TO NODE 380.00 = 2186.00 FEET. ** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 31.50 10.15 1.508 0.25( 0.21) 0.84 25.9 370.00
2 32.68 13.21 1.296 0.25( 0.21) 0.83 32.3 360.00
3 32.48 13.52 1.279 0.25( 0.21) 0.83 32.6 381.00
TOTAL AREA(ACRES) = 32.6
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 32.68 Tc(MIN.) = 13.205
EFFECTIVE AREA(ACRES) = 32.30 AREA-AVERAGED Fm(INCH/HR) = 0.21 AREA-AVERAGED Fp(INCH/HR) = 0.25 AREA-AVERAGED Ap = 0.83 TOTAL AREA(ACRES) = 32.6
LONGEST FLOWPATH FROM NODE 360.00 TO NODE 380.00 = 2186.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 380.00 TO NODE 380.00 IS CODE = 12 ---------------------------------------------------------------------------- >>>>>CLEAR MEMORY BANK # 2 <<<<<
============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 380.00 TO NODE 380.00 IS CODE = 10 ---------------------------------------------------------------------------- >>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 2 <<<<< ============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 390.00 TO NODE 391.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< ============================================================================ INITIAL SUBAREA FLOW-LENGTH(FEET) = 330.00
ELEVATION DATA: UPSTREAM(FEET) = 625.16 DOWNSTREAM(FEET) = 567.79 Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 10.190
* 2 YEAR RAINFALL INTENSITY(INCH/HR) = 1.504
SUBAREA Tc AND LOSS RATE DATA(AMC I ):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
URBAN GOOD COVER
"TURF" - 0.49 0.25 0.900 83 10.19
URBAN GOOD COVER
"TURF" - 1.48 0.20 0.900 83 10.19
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.21
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.900
SUBAREA RUNOFF(CFS) = 2.33
TOTAL AREA(ACRES) = 1.97 PEAK FLOW RATE(CFS) = 2.33
**************************************************************************** FLOW PROCESS FROM NODE 391.00 TO NODE 392.00 IS CODE = 51 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 567.79 DOWNSTREAM(FEET) = 463.11 CHANNEL LENGTH THRU SUBAREA(FEET) = 1332.00 CHANNEL SLOPE = 0.0786 CHANNEL BASE(FEET) = 0.00 "Z" FACTOR = 3.000
MANNING'S FACTOR = 0.013 MAXIMUM DEPTH(FEET) = 10.00
* 2 YEAR RAINFALL INTENSITY(INCH/HR) = 1.333
SUBAREA LOSS RATE DATA(AMC I ):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
USER-DEFINED - 0.30 0.25 0.900 -
USER-DEFINED - 0.91 0.20 0.900 -
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.21
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.900
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 2.95
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 9.30 AVERAGE FLOW DEPTH(FEET) = 0.33 TRAVEL TIME(MIN.) = 2.39 Tc(MIN.) = 12.58
SUBAREA AREA(ACRES) = 1.21 SUBAREA RUNOFF(CFS) = 1.24
EFFECTIVE AREA(ACRES) = 3.18 AREA-AVERAGED Fm(INCH/HR) = 0.19 AREA-AVERAGED Fp(INCH/HR) = 0.21 AREA-AVERAGED Ap = 0.90 TOTAL AREA(ACRES) = 3.2 PEAK FLOW RATE(CFS) = 3.27
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 0.34 FLOW VELOCITY(FEET/SEC.) = 9.51
LONGEST FLOWPATH FROM NODE 390.00 TO NODE 392.00 = 1662.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 392.00 TO NODE 380.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 458.09 DOWNSTREAM(FEET) = 456.49 FLOW LENGTH(FEET) = 320.00 MANNING'S N = 0.013
DEPTH OF FLOW IN 15.0 INCH PIPE IS 9.7 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 3.88
ESTIMATED PIPE DIAMETER(INCH) = 15.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 3.27
PIPE TRAVEL TIME(MIN.) = 1.37 Tc(MIN.) = 13.95
LONGEST FLOWPATH FROM NODE 390.00 TO NODE 380.00 = 1982.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 380.00 TO NODE 380.00 IS CODE = 11 ---------------------------------------------------------------------------- >>>>>CONFLUENCE MEMORY BANK # 2 WITH THE MAIN-STREAM MEMORY<<<<< ============================================================================ ** MAIN STREAM CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 3.27 13.95 1.256 0.21( 0.19) 0.90 3.2 390.00
LONGEST FLOWPATH FROM NODE 390.00 TO NODE 380.00 = 1982.00 FEET. ** MEMORY BANK # 2 CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 31.50 10.15 1.508 0.25( 0.21) 0.84 25.9 370.00
2 32.68 13.21 1.296 0.25( 0.21) 0.83 32.3 360.00
3 32.48 13.52 1.279 0.25( 0.21) 0.83 32.6 381.00
LONGEST FLOWPATH FROM NODE 360.00 TO NODE 380.00 = 2186.00 FEET. ** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 34.44 10.15 1.508 0.24( 0.20) 0.84 28.2 370.00
2 35.90 13.21 1.296 0.24( 0.20) 0.84 35.3 360.00
3 35.71 13.52 1.279 0.24( 0.20) 0.84 35.7 381.00
4 35.05 13.95 1.256 0.24( 0.20) 0.84 35.8 390.00
TOTAL AREA(ACRES) = 35.8
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 35.90 Tc(MIN.) = 13.205
EFFECTIVE AREA(ACRES) = 35.30 AREA-AVERAGED Fm(INCH/HR) = 0.20 AREA-AVERAGED Fp(INCH/HR) = 0.24 AREA-AVERAGED Ap = 0.84 TOTAL AREA(ACRES) = 35.8
LONGEST FLOWPATH FROM NODE 360.00 TO NODE 380.00 = 2186.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 380.00 TO NODE 380.00 IS CODE = 12 ---------------------------------------------------------------------------- >>>>>CLEAR MEMORY BANK # 2 <<<<<
============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 380.00 TO NODE 331.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 456.49 DOWNSTREAM(FEET) = 435.08 FLOW LENGTH(FEET) = 774.00 MANNING'S N = 0.013
DEPTH OF FLOW IN 27.0 INCH PIPE IS 17.2 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 13.43
ESTIMATED PIPE DIAMETER(INCH) = 27.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 35.90
PIPE TRAVEL TIME(MIN.) = 0.96 Tc(MIN.) = 14.17
LONGEST FLOWPATH FROM NODE 360.00 TO NODE 331.00 = 2960.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 380.00 TO NODE 331.00 IS CODE = 81 ---------------------------------------------------------------------------- >>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================ MAINLINE Tc(MIN.) = 14.17
* 2 YEAR RAINFALL INTENSITY(INCH/HR) = 1.245
SUBAREA LOSS RATE DATA(AMC I ):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
USER-DEFINED - 13.14 0.20 0.900 -
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.20
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.900
SUBAREA AREA(ACRES) = 13.14 SUBAREA RUNOFF(CFS) = 12.60 EFFECTIVE AREA(ACRES) = 48.44 AREA-AVERAGED Fm(INCH/HR) = 0.20 AREA-AVERAGED Fp(INCH/HR) = 0.23 AREA-AVERAGED Ap = 0.86 TOTAL AREA(ACRES) = 48.9 PEAK FLOW RATE(CFS) = 45.68
** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 45.87 11.15 1.429 0.23( 0.20) 0.86 41.4 370.00
2 45.68 14.17 1.245 0.23( 0.20) 0.86 48.4 360.00
3 45.36 14.48 1.230 0.23( 0.20) 0.86 48.8 381.00
4 44.47 14.95 1.207 0.23( 0.20) 0.86 48.9 390.00
NEW PEAK FLOW DATA ARE:
PEAK FLOW RATE(CFS) = 45.87 Tc(MIN.) = 11.15
AREA-AVERAGED Fm(INCH/HR) = 0.20 AREA-AVERAGED Fp(INCH/HR) = 0.23 AREA-AVERAGED Ap = 0.86 EFFECTIVE AREA(ACRES) = 41.36
**************************************************************************** FLOW PROCESS FROM NODE 331.00 TO NODE 331.00 IS CODE = 11 ---------------------------------------------------------------------------- >>>>>CONFLUENCE MEMORY BANK # 1 WITH THE MAIN-STREAM MEMORY<<<<< ============================================================================ ** MAIN STREAM CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 45.87 11.15 1.429 0.23( 0.20) 0.86 41.4 370.00
2 45.68 14.17 1.245 0.23( 0.20) 0.86 48.4 360.00
3 45.36 14.48 1.230 0.23( 0.20) 0.86 48.8 381.00
4 44.47 14.95 1.207 0.23( 0.20) 0.86 48.9 390.00
LONGEST FLOWPATH FROM NODE 360.00 TO NODE 331.00 = 2960.00 FEET. ** MEMORY BANK # 1 CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 50.29 16.26 1.150 0.24( 0.22) 0.90 59.4 315.00
2 49.16 17.32 1.109 0.24( 0.22) 0.90 60.7 300.00
3 45.97 20.52 1.006 0.24( 0.22) 0.90 64.1 340.00
LONGEST FLOWPATH FROM NODE 300.00 TO NODE 331.00 = 4066.00 FEET. ** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 90.65 11.15 1.429 0.24( 0.21) 0.88 82.1 370.00
2 93.95 14.17 1.245 0.24( 0.21) 0.88 100.2 360.00
3 93.96 14.48 1.230 0.24( 0.21) 0.88 101.7 381.00
4 93.53 14.95 1.207 0.24( 0.21) 0.88 103.5 390.00
5 92.26 16.26 1.150 0.24( 0.21) 0.88 108.3 315.00
6 89.32 17.32 1.109 0.24( 0.21) 0.88 109.7 300.00
7 81.60 20.52 1.006 0.24( 0.21) 0.88 113.1 340.00
TOTAL AREA(ACRES) = 113.1
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 93.96 Tc(MIN.) = 14.479
EFFECTIVE AREA(ACRES) = 101.74 AREA-AVERAGED Fm(INCH/HR) = 0.21 AREA-AVERAGED Fp(INCH/HR) = 0.24 AREA-AVERAGED Ap = 0.88 TOTAL AREA(ACRES) = 113.1
LONGEST FLOWPATH FROM NODE 300.00 TO NODE 331.00 = 4066.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 331.00 TO NODE 331.00 IS CODE = 12 ---------------------------------------------------------------------------- >>>>>CLEAR MEMORY BANK # 1 <<<<<
============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 331.00 TO NODE 335.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 435.08 DOWNSTREAM(FEET) = 433.92 FLOW LENGTH(FEET) = 558.00 MANNING'S N = 0.013
DEPTH OF FLOW IN 57.0 INCH PIPE IS 44.6 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 6.31
ESTIMATED PIPE DIAMETER(INCH) = 57.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 93.96
PIPE TRAVEL TIME(MIN.) = 1.47 Tc(MIN.) = 15.95
LONGEST FLOWPATH FROM NODE 300.00 TO NODE 335.00 = 4624.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 335.00 TO NODE 470.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 433.92 DOWNSTREAM(FEET) = 433.02 FLOW LENGTH(FEET) = 181.00 MANNING'S N = 0.013
DEPTH OF FLOW IN 48.0 INCH PIPE IS 38.4 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 8.72
ESTIMATED PIPE DIAMETER(INCH) = 48.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 93.96
PIPE TRAVEL TIME(MIN.) = 0.35 Tc(MIN.) = 16.30
LONGEST FLOWPATH FROM NODE 300.00 TO NODE 470.00 = 4805.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 470.00 TO NODE 470.00 IS CODE = 10 ---------------------------------------------------------------------------- >>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 1 <<<<< ============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 400.00 TO NODE 401.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< ============================================================================ INITIAL SUBAREA FLOW-LENGTH(FEET) = 317.00
ELEVATION DATA: UPSTREAM(FEET) = 867.54 DOWNSTREAM(FEET) = 751.33 Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 8.638
* 2 YEAR RAINFALL INTENSITY(INCH/HR) = 1.654
SUBAREA Tc AND LOSS RATE DATA(AMC I ):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
URBAN GOOD COVER
"TURF" - 1.07 0.25 0.900 83 8.64
URBAN GOOD COVER
"TURF" - 0.39 0.20 0.900 83 8.64
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.24
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.900
SUBAREA RUNOFF(CFS) = 1.89
TOTAL AREA(ACRES) = 1.46 PEAK FLOW RATE(CFS) = 1.89
**************************************************************************** FLOW PROCESS FROM NODE 401.00 TO NODE 405.00 IS CODE = 51 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 751.33 DOWNSTREAM(FEET) = 659.95 CHANNEL LENGTH THRU SUBAREA(FEET) = 250.00 CHANNEL SLOPE = 0.3655 CHANNEL BASE(FEET) = 0.00 "Z" FACTOR = 2.000
MANNING'S FACTOR = 0.013 MAXIMUM DEPTH(FEET) = 10.00
* 2 YEAR RAINFALL INTENSITY(INCH/HR) = 1.630
SUBAREA LOSS RATE DATA(AMC I ):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
USER-DEFINED - 2.37 0.25 0.900 -
USER-DEFINED - 0.83 0.20 0.900 -
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.24
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.900
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 3.93
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 18.82 AVERAGE FLOW DEPTH(FEET) = 0.32 TRAVEL TIME(MIN.) = 0.22 Tc(MIN.) = 8.86
SUBAREA AREA(ACRES) = 3.20 SUBAREA RUNOFF(CFS) = 4.08
EFFECTIVE AREA(ACRES) = 4.66 AREA-AVERAGED Fm(INCH/HR) = 0.21 AREA-AVERAGED Fp(INCH/HR) = 0.24 AREA-AVERAGED Ap = 0.90 TOTAL AREA(ACRES) = 4.7 PEAK FLOW RATE(CFS) = 5.94
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 0.38 FLOW VELOCITY(FEET/SEC.) = 20.94
LONGEST FLOWPATH FROM NODE 400.00 TO NODE 405.00 = 567.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 405.00 TO NODE 410.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 659.95 DOWNSTREAM(FEET) = 651.65 FLOW LENGTH(FEET) = 407.00 MANNING'S N = 0.013
DEPTH OF FLOW IN 15.0 INCH PIPE IS 9.1 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 7.66
ESTIMATED PIPE DIAMETER(INCH) = 15.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 5.94
PIPE TRAVEL TIME(MIN.) = 0.89 Tc(MIN.) = 9.74
LONGEST FLOWPATH FROM NODE 400.00 TO NODE 410.00 = 974.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 405.00 TO NODE 410.00 IS CODE = 81 ---------------------------------------------------------------------------- >>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================ MAINLINE Tc(MIN.) = 9.74
* 2 YEAR RAINFALL INTENSITY(INCH/HR) = 1.543
SUBAREA LOSS RATE DATA(AMC I ):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
USER-DEFINED - 9.62 0.25 0.900 -
USER-DEFINED - 1.07 0.20 0.900 -
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.24
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.900
SUBAREA AREA(ACRES) = 10.69 SUBAREA RUNOFF(CFS) = 12.73 EFFECTIVE AREA(ACRES) = 15.35 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.24 AREA-AVERAGED Ap = 0.90 TOTAL AREA(ACRES) = 15.3 PEAK FLOW RATE(CFS) = 18.31
**************************************************************************** FLOW PROCESS FROM NODE 410.00 TO NODE 411.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 651.65 DOWNSTREAM(FEET) = 637.56 FLOW LENGTH(FEET) = 1467.00 MANNING'S N = 0.013
DEPTH OF FLOW IN 24.0 INCH PIPE IS 17.3 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 7.54
ESTIMATED PIPE DIAMETER(INCH) = 24.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 18.31
PIPE TRAVEL TIME(MIN.) = 3.24 Tc(MIN.) = 12.99
LONGEST FLOWPATH FROM NODE 400.00 TO NODE 411.00 = 2441.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 410.00 TO NODE 411.00 IS CODE = 81 ---------------------------------------------------------------------------- >>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================ MAINLINE Tc(MIN.) = 12.99
* 2 YEAR RAINFALL INTENSITY(INCH/HR) = 1.309
SUBAREA LOSS RATE DATA(AMC I ):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
USER-DEFINED - 19.62 0.25 0.900 -
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.900
SUBAREA AREA(ACRES) = 19.62 SUBAREA RUNOFF(CFS) = 19.14 EFFECTIVE AREA(ACRES) = 34.97 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.25 AREA-AVERAGED Ap = 0.90 TOTAL AREA(ACRES) = 35.0 PEAK FLOW RATE(CFS) = 34.21
**************************************************************************** FLOW PROCESS FROM NODE 411.00 TO NODE 415.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 637.56 DOWNSTREAM(FEET) = 631.33 FLOW LENGTH(FEET) = 613.00 MANNING'S N = 0.013
DEPTH OF FLOW IN 30.0 INCH PIPE IS 21.7 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 9.01
ESTIMATED PIPE DIAMETER(INCH) = 30.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 34.21
PIPE TRAVEL TIME(MIN.) = 1.13 Tc(MIN.) = 14.12
LONGEST FLOWPATH FROM NODE 400.00 TO NODE 415.00 = 3054.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 411.00 TO NODE 415.00 IS CODE = 81 ---------------------------------------------------------------------------- >>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================ MAINLINE Tc(MIN.) = 14.12
* 2 YEAR RAINFALL INTENSITY(INCH/HR) = 1.247
SUBAREA LOSS RATE DATA(AMC I ):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
USER-DEFINED - 8.67 0.25 0.900 -
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.900
SUBAREA AREA(ACRES) = 8.67 SUBAREA RUNOFF(CFS) = 7.98
EFFECTIVE AREA(ACRES) = 43.64 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.25 AREA-AVERAGED Ap = 0.90 TOTAL AREA(ACRES) = 43.6 PEAK FLOW RATE(CFS) = 40.26
**************************************************************************** FLOW PROCESS FROM NODE 415.00 TO NODE 420.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 631.33 DOWNSTREAM(FEET) = 613.71 FLOW LENGTH(FEET) = 1783.00 MANNING'S N = 0.013
DEPTH OF FLOW IN 33.0 INCH PIPE IS 22.5 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 9.34
ESTIMATED PIPE DIAMETER(INCH) = 33.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 40.26
PIPE TRAVEL TIME(MIN.) = 3.18 Tc(MIN.) = 17.30
LONGEST FLOWPATH FROM NODE 400.00 TO NODE 420.00 = 4837.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 415.00 TO NODE 420.00 IS CODE = 81 ---------------------------------------------------------------------------- >>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================ MAINLINE Tc(MIN.) = 17.30
* 2 YEAR RAINFALL INTENSITY(INCH/HR) = 1.110
SUBAREA LOSS RATE DATA(AMC I ):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
USER-DEFINED - 0.38 0.40 0.900 -
USER-DEFINED - 26.21 0.25 0.900 -
USER-DEFINED - 11.39 0.20 0.900 -
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.24
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.900
SUBAREA AREA(ACRES) = 37.98 SUBAREA RUNOFF(CFS) = 30.68 EFFECTIVE AREA(ACRES) = 81.62 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.24 AREA-AVERAGED Ap = 0.90 TOTAL AREA(ACRES) = 81.6 PEAK FLOW RATE(CFS) = 65.54
**************************************************************************** FLOW PROCESS FROM NODE 420.00 TO NODE 420.00 IS CODE = 10 ---------------------------------------------------------------------------- >>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 3 <<<<< ============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 425.00 TO NODE 426.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< ============================================================================ INITIAL SUBAREA FLOW-LENGTH(FEET) = 290.00
ELEVATION DATA: UPSTREAM(FEET) = 865.54 DOWNSTREAM(FEET) = 751.02 Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 8.212
* 2 YEAR RAINFALL INTENSITY(INCH/HR) = 1.703
SUBAREA Tc AND LOSS RATE DATA(AMC I ):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
URBAN GOOD COVER
"TURF" - 0.61 0.25 0.900 83 8.21
URBAN GOOD COVER
"TURF" - 0.27 0.20 0.900 83 8.21
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.23
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.900
SUBAREA RUNOFF(CFS) = 1.18
TOTAL AREA(ACRES) = 0.88 PEAK FLOW RATE(CFS) = 1.18
**************************************************************************** FLOW PROCESS FROM NODE 426.00 TO NODE 430.00 IS CODE = 51 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 751.02 DOWNSTREAM(FEET) = 655.76 CHANNEL LENGTH THRU SUBAREA(FEET) = 251.00 CHANNEL SLOPE = 0.3795 CHANNEL BASE(FEET) = 0.00 "Z" FACTOR = 2.000
MANNING'S FACTOR = 0.013 MAXIMUM DEPTH(FEET) = 10.00
* 2 YEAR RAINFALL INTENSITY(INCH/HR) = 1.675
SUBAREA LOSS RATE DATA(AMC I ):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
USER-DEFINED - 1.85 0.25 0.900 -
USER-DEFINED - 0.66 0.20 0.900 -
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.24
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.900
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 2.83
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 17.42 AVERAGE FLOW DEPTH(FEET) = 0.29 TRAVEL TIME(MIN.) = 0.24 Tc(MIN.) = 8.45
SUBAREA AREA(ACRES) = 2.51 SUBAREA RUNOFF(CFS) = 3.30
EFFECTIVE AREA(ACRES) = 3.39 AREA-AVERAGED Fm(INCH/HR) = 0.21 AREA-AVERAGED Fp(INCH/HR) = 0.24 AREA-AVERAGED Ap = 0.90 TOTAL AREA(ACRES) = 3.4 PEAK FLOW RATE(CFS) = 4.46
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 0.33 FLOW VELOCITY(FEET/SEC.) = 20.14
LONGEST FLOWPATH FROM NODE 425.00 TO NODE 430.00 = 541.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 430.00 TO NODE 435.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 655.76 DOWNSTREAM(FEET) = 625.08 FLOW LENGTH(FEET) = 1326.00 MANNING'S N = 0.013
DEPTH OF FLOW IN 12.0 INCH PIPE IS 8.6 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 7.37
ESTIMATED PIPE DIAMETER(INCH) = 12.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 4.46
PIPE TRAVEL TIME(MIN.) = 3.00 Tc(MIN.) = 11.45
LONGEST FLOWPATH FROM NODE 425.00 TO NODE 435.00 = 1867.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 430.00 TO NODE 435.00 IS CODE = 81 ---------------------------------------------------------------------------- >>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================ MAINLINE Tc(MIN.) = 11.45
* 2 YEAR RAINFALL INTENSITY(INCH/HR) = 1.407
SUBAREA LOSS RATE DATA(AMC I ):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
USER-DEFINED - 14.67 0.25 0.900 -
USER-DEFINED - 6.92 0.20 0.900 -
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.23
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.900
SUBAREA AREA(ACRES) = 21.59 SUBAREA RUNOFF(CFS) = 23.25 EFFECTIVE AREA(ACRES) = 24.98 AREA-AVERAGED Fm(INCH/HR) = 0.21 AREA-AVERAGED Fp(INCH/HR) = 0.23 AREA-AVERAGED Ap = 0.90 TOTAL AREA(ACRES) = 25.0 PEAK FLOW RATE(CFS) = 26.89
**************************************************************************** FLOW PROCESS FROM NODE 435.00 TO NODE 420.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 625.08 DOWNSTREAM(FEET) = 613.71 FLOW LENGTH(FEET) = 604.00 MANNING'S N = 0.013
DEPTH OF FLOW IN 24.0 INCH PIPE IS 18.0 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 10.63
ESTIMATED PIPE DIAMETER(INCH) = 24.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 26.89
PIPE TRAVEL TIME(MIN.) = 0.95 Tc(MIN.) = 12.40
LONGEST FLOWPATH FROM NODE 425.00 TO NODE 420.00 = 2471.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 435.00 TO NODE 420.00 IS CODE = 81 ---------------------------------------------------------------------------- >>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================ MAINLINE Tc(MIN.) = 12.40
* 2 YEAR RAINFALL INTENSITY(INCH/HR) = 1.344
SUBAREA LOSS RATE DATA(AMC I ):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
USER-DEFINED - 0.25 0.40 0.100 -
USER-DEFINED - 0.23 0.25 0.100 -
USER-DEFINED - 1.32 0.20 0.100 -
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.23
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA AREA(ACRES) = 1.80 SUBAREA RUNOFF(CFS) = 2.14
EFFECTIVE AREA(ACRES) = 26.78 AREA-AVERAGED Fm(INCH/HR) = 0.20 AREA-AVERAGED Fp(INCH/HR) = 0.23 AREA-AVERAGED Ap = 0.85 TOTAL AREA(ACRES) = 26.8 PEAK FLOW RATE(CFS) = 27.62
**************************************************************************** FLOW PROCESS FROM NODE 420.00 TO NODE 420.00 IS CODE = 11 ---------------------------------------------------------------------------- >>>>>CONFLUENCE MEMORY BANK # 3 WITH THE MAIN-STREAM MEMORY<<<<< ============================================================================ ** MAIN STREAM CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 27.62 12.40 1.344 0.23( 0.20) 0.85 26.8 425.00
LONGEST FLOWPATH FROM NODE 425.00 TO NODE 420.00 = 2471.00 FEET. ** MEMORY BANK # 3 CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 65.54 17.30 1.110 0.24( 0.22) 0.90 81.6 400.00
LONGEST FLOWPATH FROM NODE 400.00 TO NODE 420.00 = 4837.00 FEET. ** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 86.91 12.40 1.344 0.24( 0.21) 0.88 85.3 425.00
2 87.52 17.30 1.110 0.24( 0.21) 0.89 108.4 400.00
TOTAL AREA(ACRES) = 108.4
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 87.52 Tc(MIN.) = 17.300
EFFECTIVE AREA(ACRES) = 108.40 AREA-AVERAGED Fm(INCH/HR) = 0.21 AREA-AVERAGED Fp(INCH/HR) = 0.24 AREA-AVERAGED Ap = 0.89 TOTAL AREA(ACRES) = 108.4
LONGEST FLOWPATH FROM NODE 400.00 TO NODE 420.00 = 4837.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 420.00 TO NODE 420.00 IS CODE = 12 ---------------------------------------------------------------------------- >>>>>CLEAR MEMORY BANK # 3 <<<<<
============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 420.00 TO NODE 455.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 613.71 DOWNSTREAM(FEET) = 607.29 FLOW LENGTH(FEET) = 511.00 MANNING'S N = 0.013
DEPTH OF FLOW IN 39.0 INCH PIPE IS 31.9 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 12.07
ESTIMATED PIPE DIAMETER(INCH) = 39.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 87.52
PIPE TRAVEL TIME(MIN.) = 0.71 Tc(MIN.) = 18.01
LONGEST FLOWPATH FROM NODE 400.00 TO NODE 455.00 = 5348.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 420.00 TO NODE 455.00 IS CODE = 81 ---------------------------------------------------------------------------- >>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================ MAINLINE Tc(MIN.) = 18.01
* 2 YEAR RAINFALL INTENSITY(INCH/HR) = 1.085
SUBAREA LOSS RATE DATA(AMC I ):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
USER-DEFINED - 1.30 0.40 0.100 -
USER-DEFINED - 0.03 0.20 0.100 -
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA AREA(ACRES) = 1.33 SUBAREA RUNOFF(CFS) = 1.25
EFFECTIVE AREA(ACRES) = 109.73 AREA-AVERAGED Fm(INCH/HR) = 0.21 AREA-AVERAGED Fp(INCH/HR) = 0.24 AREA-AVERAGED Ap = 0.88 TOTAL AREA(ACRES) = 109.7 PEAK FLOW RATE(CFS) = 87.52
NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE
**************************************************************************** FLOW PROCESS FROM NODE 455.00 TO NODE 455.00 IS CODE = 10 ---------------------------------------------------------------------------- >>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 2 <<<<< ============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 10.00 TO NODE 11.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< ============================================================================ INITIAL SUBAREA FLOW-LENGTH(FEET) = 319.00
ELEVATION DATA: UPSTREAM(FEET) = 940.00 DOWNSTREAM(FEET) = 830.00 Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 6.519
* 2 YEAR RAINFALL INTENSITY(INCH/HR) = 1.944
SUBAREA Tc AND LOSS RATE DATA(AMC I ):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
NATURAL POOR COVER
"BARREN" D 0.19 0.20 1.000 83 6.52
NATURAL POOR COVER
"BARREN" C 1.12 0.25 1.000 80 6.52
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.24
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
SUBAREA RUNOFF(CFS) = 2.01
TOTAL AREA(ACRES) = 1.31 PEAK FLOW RATE(CFS) = 2.01
**************************************************************************** FLOW PROCESS FROM NODE 11.00 TO NODE 12.00 IS CODE = 51 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 830.00 DOWNSTREAM(FEET) = 671.81 CHANNEL LENGTH THRU SUBAREA(FEET) = 453.00 CHANNEL SLOPE = 0.3492 CHANNEL BASE(FEET) = 0.00 "Z" FACTOR = 2.500
MANNING'S FACTOR = 0.030 MAXIMUM DEPTH(FEET) = 10.00
* 2 YEAR RAINFALL INTENSITY(INCH/HR) = 1.821
SUBAREA LOSS RATE DATA(AMC I ):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" C 0.06 0.25 1.000 80
NATURAL POOR COVER
"BARREN" D 2.49 0.20 1.000 83
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.20
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 3.86
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 9.59 AVERAGE FLOW DEPTH(FEET) = 0.40 TRAVEL TIME(MIN.) = 0.79 Tc(MIN.) = 7.31
SUBAREA AREA(ACRES) = 2.55 SUBAREA RUNOFF(CFS) = 3.72
EFFECTIVE AREA(ACRES) = 3.86 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.22 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 3.9 PEAK FLOW RATE(CFS) = 5.58
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 0.46 FLOW VELOCITY(FEET/SEC.) = 10.52
LONGEST FLOWPATH FROM NODE 10.00 TO NODE 12.00 = 772.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 12.00 TO NODE 20.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 671.81 DOWNSTREAM(FEET) = 647.83 FLOW LENGTH(FEET) = 118.00 MANNING'S N = 0.013
ESTIMATED PIPE DIAMETER(INCH) INCREASED TO 12.000
DEPTH OF FLOW IN 12.0 INCH PIPE IS 5.0 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 17.89
ESTIMATED PIPE DIAMETER(INCH) = 12.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 5.58
PIPE TRAVEL TIME(MIN.) = 0.11 Tc(MIN.) = 7.42
LONGEST FLOWPATH FROM NODE 10.00 TO NODE 20.00 = 890.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 20.00 TO NODE 20.00 IS CODE = 10 ---------------------------------------------------------------------------- >>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 3 <<<<< ============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 13.00 TO NODE 14.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< ============================================================================ INITIAL SUBAREA FLOW-LENGTH(FEET) = 178.00
ELEVATION DATA: UPSTREAM(FEET) = 1058.19 DOWNSTREAM(FEET) = 984.25 Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 5.000
* 2 YEAR RAINFALL INTENSITY(INCH/HR) = 2.264
SUBAREA Tc AND LOSS RATE DATA(AMC I ):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
NATURAL POOR COVER
"BARREN" C 2.11 0.25 1.000 80 5.00
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
SUBAREA RUNOFF(CFS) = 3.82
TOTAL AREA(ACRES) = 2.11 PEAK FLOW RATE(CFS) = 3.82
**************************************************************************** FLOW PROCESS FROM NODE 14.00 TO NODE 15.00 IS CODE = 51 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 984.25 DOWNSTREAM(FEET) = 669.90 CHANNEL LENGTH THRU SUBAREA(FEET) = 1335.00 CHANNEL SLOPE = 0.2355 CHANNEL BASE(FEET) = 0.00 "Z" FACTOR = 2.500
MANNING'S FACTOR = 0.030 MAXIMUM DEPTH(FEET) = 10.00
* 2 YEAR RAINFALL INTENSITY(INCH/HR) = 1.887
SUBAREA LOSS RATE DATA(AMC I ):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" C 11.50 0.25 1.000 80
NATURAL POOR COVER
"BARREN" D 6.24 0.20 1.000 83
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.23
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 17.14
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 11.93 AVERAGE FLOW DEPTH(FEET) = 0.76 TRAVEL TIME(MIN.) = 1.87 Tc(MIN.) = 6.87
SUBAREA AREA(ACRES) = 17.74 SUBAREA RUNOFF(CFS) = 26.42 EFFECTIVE AREA(ACRES) = 19.85 AREA-AVERAGED Fm(INCH/HR) = 0.23 AREA-AVERAGED Fp(INCH/HR) = 0.23 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 19.9 PEAK FLOW RATE(CFS) = 29.53
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 0.93 FLOW VELOCITY(FEET/SEC.) = 13.72
LONGEST FLOWPATH FROM NODE 13.00 TO NODE 15.00 = 1513.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 15.00 TO NODE 20.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 669.90 DOWNSTREAM(FEET) = 647.83 FLOW LENGTH(FEET) = 119.00 MANNING'S N = 0.013
DEPTH OF FLOW IN 18.0 INCH PIPE IS 11.0 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 26.18
ESTIMATED PIPE DIAMETER(INCH) = 18.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 29.53
PIPE TRAVEL TIME(MIN.) = 0.08 Tc(MIN.) = 6.94
LONGEST FLOWPATH FROM NODE 13.00 TO NODE 20.00 = 1632.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 20.00 TO NODE 20.00 IS CODE = 11 ---------------------------------------------------------------------------- >>>>>CONFLUENCE MEMORY BANK # 3 WITH THE MAIN-STREAM MEMORY<<<<< ============================================================================ ** MAIN STREAM CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 29.53 6.94 1.875 0.23( 0.23) 1.00 19.9 13.00
LONGEST FLOWPATH FROM NODE 13.00 TO NODE 20.00 = 1632.00 FEET. ** MEMORY BANK # 3 CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 5.58 7.42 1.805 0.22( 0.22) 1.00 3.9 10.00
LONGEST FLOWPATH FROM NODE 10.00 TO NODE 20.00 = 890.00 FEET. ** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 34.98 6.94 1.875 0.23( 0.23) 1.00 23.5 13.00
2 33.85 7.42 1.805 0.23( 0.23) 1.00 23.7 10.00
TOTAL AREA(ACRES) = 23.7
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 34.98 Tc(MIN.) = 6.941
EFFECTIVE AREA(ACRES) = 23.46 AREA-AVERAGED Fm(INCH/HR) = 0.23 AREA-AVERAGED Fp(INCH/HR) = 0.23 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 23.7
LONGEST FLOWPATH FROM NODE 13.00 TO NODE 20.00 = 1632.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 20.00 TO NODE 20.00 IS CODE = 12 ---------------------------------------------------------------------------- >>>>>CLEAR MEMORY BANK # 3 <<<<<
============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 20.00 TO NODE 30.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 647.83 DOWNSTREAM(FEET) = 624.60 FLOW LENGTH(FEET) = 767.00 MANNING'S N = 0.013
DEPTH OF FLOW IN 24.0 INCH PIPE IS 18.4 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 13.51
ESTIMATED PIPE DIAMETER(INCH) = 24.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 34.98
PIPE TRAVEL TIME(MIN.) = 0.95 Tc(MIN.) = 7.89
LONGEST FLOWPATH FROM NODE 13.00 TO NODE 30.00 = 2399.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 20.00 TO NODE 30.00 IS CODE = 81 ---------------------------------------------------------------------------- >>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================ MAINLINE Tc(MIN.) = 7.89
* 2 YEAR RAINFALL INTENSITY(INCH/HR) = 1.743
SUBAREA LOSS RATE DATA(AMC I ):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
USER-DEFINED - 0.91 0.25 0.900 -
USER-DEFINED - 0.91 0.20 0.900 -
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.22
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.900
SUBAREA AREA(ACRES) = 1.82 SUBAREA RUNOFF(CFS) = 2.52
EFFECTIVE AREA(ACRES) = 25.28 AREA-AVERAGED Fm(INCH/HR) = 0.23 AREA-AVERAGED Fp(INCH/HR) = 0.23 AREA-AVERAGED Ap = 0.99 TOTAL AREA(ACRES) = 25.5 PEAK FLOW RATE(CFS) = 34.98
NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE
**************************************************************************** FLOW PROCESS FROM NODE 30.00 TO NODE 30.00 IS CODE = 10 ---------------------------------------------------------------------------- >>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 3 <<<<< ============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 21.00 TO NODE 22.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< ============================================================================ INITIAL SUBAREA FLOW-LENGTH(FEET) = 239.00
ELEVATION DATA: UPSTREAM(FEET) = 1140.97 DOWNSTREAM(FEET) = 1082.68 Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 6.224
* 2 YEAR RAINFALL INTENSITY(INCH/HR) = 1.996
SUBAREA Tc AND LOSS RATE DATA(AMC I ):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
NATURAL POOR COVER
"BARREN" D 1.26 0.20 1.000 83 6.22
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.20
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
SUBAREA RUNOFF(CFS) = 2.04
TOTAL AREA(ACRES) = 1.26 PEAK FLOW RATE(CFS) = 2.04
**************************************************************************** FLOW PROCESS FROM NODE 22.00 TO NODE 25.00 IS CODE = 51 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 1082.68 DOWNSTREAM(FEET) = 706.33 CHANNEL LENGTH THRU SUBAREA(FEET) = 1409.00 CHANNEL SLOPE = 0.2671 CHANNEL BASE(FEET) = 0.00 "Z" FACTOR = 2.500
MANNING'S FACTOR = 0.030 MAXIMUM DEPTH(FEET) = 10.00
* 2 YEAR RAINFALL INTENSITY(INCH/HR) = 1.700
SUBAREA LOSS RATE DATA(AMC I ):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" C 1.62 0.25 1.000 80
NATURAL POOR COVER
"BARREN" D 14.57 0.20 1.000 83
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.21
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 13.00
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 11.70 AVERAGE FLOW DEPTH(FEET) = 0.67 TRAVEL TIME(MIN.) = 2.01 Tc(MIN.) = 8.23
SUBAREA AREA(ACRES) = 16.19 SUBAREA RUNOFF(CFS) = 21.79 EFFECTIVE AREA(ACRES) = 17.45 AREA-AVERAGED Fm(INCH/HR) = 0.20 AREA-AVERAGED Fp(INCH/HR) = 0.20 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 17.5 PEAK FLOW RATE(CFS) = 23.49
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 0.83 FLOW VELOCITY(FEET/SEC.) = 13.49
LONGEST FLOWPATH FROM NODE 21.00 TO NODE 25.00 = 1648.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 25.00 TO NODE 25.00 IS CODE = 1
---------------------------------------------------------------------------- >>>>>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE<<<<<
============================================================================ TOTAL NUMBER OF STREAMS = 2
CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 1 ARE:
TIME OF CONCENTRATION(MIN.) = 8.23
RAINFALL INTENSITY(INCH/HR) = 1.70
AREA-AVERAGED Fm(INCH/HR) = 0.20
AREA-AVERAGED Fp(INCH/HR) = 0.20
AREA-AVERAGED Ap = 1.00
EFFECTIVE STREAM AREA(ACRES) = 17.45
TOTAL STREAM AREA(ACRES) = 17.45
PEAK FLOW RATE(CFS) AT CONFLUENCE = 23.49
**************************************************************************** FLOW PROCESS FROM NODE 23.00 TO NODE 24.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< ============================================================================ INITIAL SUBAREA FLOW-LENGTH(FEET) = 273.00
ELEVATION DATA: UPSTREAM(FEET) = 1101.23 DOWNSTREAM(FEET) = 1025.31 Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 6.394
* 2 YEAR RAINFALL INTENSITY(INCH/HR) = 1.966
SUBAREA Tc AND LOSS RATE DATA(AMC I ):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
NATURAL POOR COVER
"BARREN" C 2.34 0.25 1.000 80 6.39
NATURAL POOR COVER
"BARREN" D 3.50 0.20 1.000 83 6.39
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.22
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
SUBAREA RUNOFF(CFS) = 9.17
TOTAL AREA(ACRES) = 5.84 PEAK FLOW RATE(CFS) = 9.17
**************************************************************************** FLOW PROCESS FROM NODE 24.00 TO NODE 25.00 IS CODE = 51 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 1025.31 DOWNSTREAM(FEET) = 706.33 CHANNEL LENGTH THRU SUBAREA(FEET) = 1345.00 CHANNEL SLOPE = 0.2372 CHANNEL BASE(FEET) = 0.00 "Z" FACTOR = 2.500
MANNING'S FACTOR = 0.030 MAXIMUM DEPTH(FEET) = 10.00
* 2 YEAR RAINFALL INTENSITY(INCH/HR) = 1.706
SUBAREA LOSS RATE DATA(AMC I ):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" C 8.55 0.25 1.000 80
NATURAL POOR COVER
"BARREN" D 8.56 0.20 1.000 83
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.22
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 20.63
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 12.53 AVERAGE FLOW DEPTH(FEET) = 0.81 TRAVEL TIME(MIN.) = 1.79 Tc(MIN.) = 8.18
SUBAREA AREA(ACRES) = 17.11 SUBAREA RUNOFF(CFS) = 22.81 EFFECTIVE AREA(ACRES) = 22.95 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.22 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 23.0 PEAK FLOW RATE(CFS) = 30.62
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 0.94 FLOW VELOCITY(FEET/SEC.) = 13.82
LONGEST FLOWPATH FROM NODE 23.00 TO NODE 25.00 = 1618.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 25.00 TO NODE 25.00 IS CODE = 1
---------------------------------------------------------------------------- >>>>>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE<<<<<
>>>>>AND COMPUTE VARIOUS CONFLUENCED STREAM VALUES<<<<< ============================================================================ TOTAL NUMBER OF STREAMS = 2
CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 2 ARE:
TIME OF CONCENTRATION(MIN.) = 8.18
RAINFALL INTENSITY(INCH/HR) = 1.71
AREA-AVERAGED Fm(INCH/HR) = 0.22
AREA-AVERAGED Fp(INCH/HR) = 0.22
AREA-AVERAGED Ap = 1.00
EFFECTIVE STREAM AREA(ACRES) = 22.95
TOTAL STREAM AREA(ACRES) = 22.95
PEAK FLOW RATE(CFS) AT CONFLUENCE = 30.62
** CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 23.49 8.23 1.700 0.20( 0.20) 1.00 17.5 21.00
2 30.62 8.18 1.706 0.22( 0.22) 1.00 23.0 23.00
RAINFALL INTENSITY AND TIME OF CONCENTRATION RATIO
CONFLUENCE FORMULA USED FOR 2 STREAMS.
** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 54.06 8.18 1.706 0.22( 0.22) 1.00 40.3 23.00
2 53.99 8.23 1.700 0.22( 0.22) 1.00 40.4 21.00
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 54.06 Tc(MIN.) = 8.18
EFFECTIVE AREA(ACRES) = 40.30 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.22 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 40.4
LONGEST FLOWPATH FROM NODE 21.00 TO NODE 25.00 = 1648.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 25.00 TO NODE 28.00 IS CODE = 51 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 706.33 DOWNSTREAM(FEET) = 638.00 CHANNEL LENGTH THRU SUBAREA(FEET) = 1254.00 CHANNEL SLOPE = 0.0545 CHANNEL BASE(FEET) = 0.00 "Z" FACTOR = 2.500
MANNING'S FACTOR = 0.030 MAXIMUM DEPTH(FEET) = 10.00
* 2 YEAR RAINFALL INTENSITY(INCH/HR) = 1.490
SUBAREA LOSS RATE DATA(AMC I ):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" C 8.68 0.25 1.000 80
NATURAL POOR COVER
"BARREN" D 7.10 0.20 1.000 83
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.23
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 63.03
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 9.58 AVERAGE FLOW DEPTH(FEET) = 1.62 TRAVEL TIME(MIN.) = 2.18 Tc(MIN.) = 10.36
SUBAREA AREA(ACRES) = 15.78 SUBAREA RUNOFF(CFS) = 17.93 EFFECTIVE AREA(ACRES) = 56.08 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.22 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 56.2 PEAK FLOW RATE(CFS) = 64.14
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 1.64 FLOW VELOCITY(FEET/SEC.) = 9.59
LONGEST FLOWPATH FROM NODE 21.00 TO NODE 28.00 = 2902.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 28.00 TO NODE 28.00 IS CODE = 1
---------------------------------------------------------------------------- >>>>>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE<<<<<
============================================================================ TOTAL NUMBER OF STREAMS = 2
CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 1 ARE:
TIME OF CONCENTRATION(MIN.) = 10.36
RAINFALL INTENSITY(INCH/HR) = 1.49
AREA-AVERAGED Fm(INCH/HR) = 0.22
AREA-AVERAGED Fp(INCH/HR) = 0.22
AREA-AVERAGED Ap = 1.00
EFFECTIVE STREAM AREA(ACRES) = 56.08
TOTAL STREAM AREA(ACRES) = 56.18
PEAK FLOW RATE(CFS) AT CONFLUENCE = 64.14
**************************************************************************** FLOW PROCESS FROM NODE 26.00 TO NODE 27.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< ============================================================================ INITIAL SUBAREA FLOW-LENGTH(FEET) = 180.00
ELEVATION DATA: UPSTREAM(FEET) = 730.00 DOWNSTREAM(FEET) = 692.00 Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 5.720
* 2 YEAR RAINFALL INTENSITY(INCH/HR) = 2.096
SUBAREA Tc AND LOSS RATE DATA(AMC I ):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
NATURAL POOR COVER
"BARREN" C 0.56 0.25 1.000 80 5.72
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
SUBAREA RUNOFF(CFS) = 0.93
TOTAL AREA(ACRES) = 0.56 PEAK FLOW RATE(CFS) = 0.93
**************************************************************************** FLOW PROCESS FROM NODE 27.00 TO NODE 28.00 IS CODE = 51 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 692.00 DOWNSTREAM(FEET) = 638.00 CHANNEL LENGTH THRU SUBAREA(FEET) = 352.00 CHANNEL SLOPE = 0.1534 CHANNEL BASE(FEET) = 0.00 "Z" FACTOR = 2.500
MANNING'S FACTOR = 0.030 MAXIMUM DEPTH(FEET) = 10.00
* 2 YEAR RAINFALL INTENSITY(INCH/HR) = 1.912
SUBAREA LOSS RATE DATA(AMC I ):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" C 1.34 0.25 1.000 80
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 1.93
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 5.92 AVERAGE FLOW DEPTH(FEET) = 0.36 TRAVEL TIME(MIN.) = 0.99 Tc(MIN.) = 6.71
SUBAREA AREA(ACRES) = 1.34 SUBAREA RUNOFF(CFS) = 2.00
EFFECTIVE AREA(ACRES) = 1.90 AREA-AVERAGED Fm(INCH/HR) = 0.25 AREA-AVERAGED Fp(INCH/HR) = 0.25 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 1.9 PEAK FLOW RATE(CFS) = 2.84
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 0.42 FLOW VELOCITY(FEET/SEC.) = 6.54
LONGEST FLOWPATH FROM NODE 26.00 TO NODE 28.00 = 532.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 28.00 TO NODE 28.00 IS CODE = 1
---------------------------------------------------------------------------- >>>>>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE<<<<<
>>>>>AND COMPUTE VARIOUS CONFLUENCED STREAM VALUES<<<<< ============================================================================ TOTAL NUMBER OF STREAMS = 2
CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 2 ARE:
TIME OF CONCENTRATION(MIN.) = 6.71
RAINFALL INTENSITY(INCH/HR) = 1.91
AREA-AVERAGED Fm(INCH/HR) = 0.25
AREA-AVERAGED Fp(INCH/HR) = 0.25
AREA-AVERAGED Ap = 1.00
EFFECTIVE STREAM AREA(ACRES) = 1.90
TOTAL STREAM AREA(ACRES) = 1.90
PEAK FLOW RATE(CFS) AT CONFLUENCE = 2.84
** CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 64.14 10.36 1.490 0.22( 0.22) 1.00 56.1 23.00
1 64.04 10.42 1.486 0.22( 0.22) 1.00 56.2 21.00
2 2.84 6.71 1.912 0.25( 0.25) 1.00 1.9 26.00
RAINFALL INTENSITY AND TIME OF CONCENTRATION RATIO
CONFLUENCE FORMULA USED FOR 2 STREAMS.
** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 58.17 6.71 1.912 0.22( 0.22) 1.00 38.2 26.00
2 66.26 10.36 1.490 0.22( 0.22) 1.00 58.0 23.00
3 66.16 10.42 1.486 0.22( 0.22) 1.00 58.1 21.00
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 66.26 Tc(MIN.) = 10.36
EFFECTIVE AREA(ACRES) = 57.98 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.22 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 58.1
LONGEST FLOWPATH FROM NODE 21.00 TO NODE 28.00 = 2902.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 28.00 TO NODE 30.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 638.00 DOWNSTREAM(FEET) = 624.60 FLOW LENGTH(FEET) = 140.00 MANNING'S N = 0.013
DEPTH OF FLOW IN 24.0 INCH PIPE IS 19.6 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 24.09
ESTIMATED PIPE DIAMETER(INCH) = 24.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 66.26
PIPE TRAVEL TIME(MIN.) = 0.10 Tc(MIN.) = 10.46
LONGEST FLOWPATH FROM NODE 21.00 TO NODE 30.00 = 3042.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 30.00 TO NODE 30.00 IS CODE = 11 ---------------------------------------------------------------------------- >>>>>CONFLUENCE MEMORY BANK # 3 WITH THE MAIN-STREAM MEMORY<<<<< ============================================================================ ** MAIN STREAM CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 58.17 6.81 1.896 0.22( 0.22) 1.00 38.2 26.00
2 66.26 10.46 1.482 0.22( 0.22) 1.00 58.0 23.00
3 66.16 10.51 1.478 0.22( 0.22) 1.00 58.1 21.00
LONGEST FLOWPATH FROM NODE 21.00 TO NODE 30.00 = 3042.00 FEET. ** MEMORY BANK # 3 CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 34.98 7.89 1.743 0.23( 0.23) 0.99 25.3 13.00
2 33.85 8.37 1.685 0.23( 0.23) 0.99 25.5 10.00
LONGEST FLOWPATH FROM NODE 13.00 TO NODE 30.00 = 2399.00 FEET. ** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 91.42 6.81 1.896 0.22( 0.22) 1.00 60.0 26.00
2 95.53 7.89 1.743 0.22( 0.22) 1.00 69.3 13.00
3 95.46 8.37 1.685 0.22( 0.22) 1.00 72.2 10.00
4 95.39 10.46 1.482 0.22( 0.22) 1.00 83.5 23.00
5 95.19 10.51 1.478 0.22( 0.22) 1.00 83.6 21.00
TOTAL AREA(ACRES) = 83.6
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 95.53 Tc(MIN.) = 7.887
EFFECTIVE AREA(ACRES) = 69.33 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.22 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 83.6
LONGEST FLOWPATH FROM NODE 21.00 TO NODE 30.00 = 3042.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 30.00 TO NODE 30.00 IS CODE = 12 ---------------------------------------------------------------------------- >>>>>CLEAR MEMORY BANK # 3 <<<<<
============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 30.00 TO NODE 40.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 624.60 DOWNSTREAM(FEET) = 617.67 FLOW LENGTH(FEET) = 200.00 MANNING'S N = 0.013
DEPTH OF FLOW IN 36.0 INCH PIPE IS 24.6 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 18.56
ESTIMATED PIPE DIAMETER(INCH) = 36.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 95.53
PIPE TRAVEL TIME(MIN.) = 0.18 Tc(MIN.) = 8.07
LONGEST FLOWPATH FROM NODE 21.00 TO NODE 40.00 = 3242.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 40.00 TO NODE 40.00 IS CODE = 10 ---------------------------------------------------------------------------- >>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 3 <<<<< ============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 32.00 TO NODE 34.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< ============================================================================ INITIAL SUBAREA FLOW-LENGTH(FEET) = 159.00
ELEVATION DATA: UPSTREAM(FEET) = 682.00 DOWNSTREAM(FEET) = 632.00 Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 5.026
* 2 YEAR RAINFALL INTENSITY(INCH/HR) = 2.257
SUBAREA Tc AND LOSS RATE DATA(AMC I ):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
NATURAL POOR COVER
"BARREN" C 0.18 0.25 1.000 80 5.03
NATURAL POOR COVER
"BARREN" D 0.19 0.20 1.000 83 5.03
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.22
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
SUBAREA RUNOFF(CFS) = 0.68
TOTAL AREA(ACRES) = 0.37 PEAK FLOW RATE(CFS) = 0.68
**************************************************************************** FLOW PROCESS FROM NODE 34.00 TO NODE 40.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 632.00 DOWNSTREAM(FEET) = 617.67 FLOW LENGTH(FEET) = 123.00 MANNING'S N = 0.013
ESTIMATED PIPE DIAMETER(INCH) INCREASED TO 12.000
DEPTH OF FLOW IN 12.0 INCH PIPE IS 2.0 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 8.00
ESTIMATED PIPE DIAMETER(INCH) = 12.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 0.68
PIPE TRAVEL TIME(MIN.) = 0.26 Tc(MIN.) = 5.28
LONGEST FLOWPATH FROM NODE 32.00 TO NODE 40.00 = 282.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 40.00 TO NODE 40.00 IS CODE = 11 ---------------------------------------------------------------------------- >>>>>CONFLUENCE MEMORY BANK # 3 WITH THE MAIN-STREAM MEMORY<<<<< ============================================================================ ** MAIN STREAM CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 0.68 5.28 2.194 0.22( 0.22) 1.00 0.4 32.00
LONGEST FLOWPATH FROM NODE 32.00 TO NODE 40.00 = 282.00 FEET. ** MEMORY BANK # 3 CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 91.42 6.99 1.867 0.22( 0.22) 1.00 60.0 26.00
2 95.53 8.07 1.720 0.22( 0.22) 1.00 69.3 13.00
3 95.46 8.55 1.664 0.22( 0.22) 1.00 72.2 10.00
4 95.39 10.64 1.467 0.22( 0.22) 1.00 83.5 23.00
5 95.19 10.69 1.463 0.22( 0.22) 1.00 83.6 21.00
LONGEST FLOWPATH FROM NODE 21.00 TO NODE 40.00 = 3242.00 FEET. ** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 83.43 5.28 2.194 0.22( 0.22) 1.00 45.7 32.00
2 91.98 6.99 1.867 0.22( 0.22) 1.00 60.4 26.00
3 96.05 8.07 1.720 0.22( 0.22) 1.00 69.7 13.00
4 95.96 8.55 1.664 0.22( 0.22) 1.00 72.5 10.00
5 95.81 10.64 1.467 0.22( 0.22) 1.00 83.9 23.00
6 95.61 10.69 1.463 0.22( 0.22) 1.00 84.0 21.00
TOTAL AREA(ACRES) = 84.0
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 96.05 Tc(MIN.) = 8.067
EFFECTIVE AREA(ACRES) = 69.70 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.22 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 84.0
LONGEST FLOWPATH FROM NODE 21.00 TO NODE 40.00 = 3242.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 40.00 TO NODE 40.00 IS CODE = 12 ---------------------------------------------------------------------------- >>>>>CLEAR MEMORY BANK # 3 <<<<<
============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 40.00 TO NODE 455.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 617.67 DOWNSTREAM(FEET) = 607.29 FLOW LENGTH(FEET) = 914.00 MANNING'S N = 0.013
DEPTH OF FLOW IN 42.0 INCH PIPE IS 32.5 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 12.02
ESTIMATED PIPE DIAMETER(INCH) = 42.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 96.05
PIPE TRAVEL TIME(MIN.) = 1.27 Tc(MIN.) = 9.33
LONGEST FLOWPATH FROM NODE 21.00 TO NODE 455.00 = 4156.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 455.00 TO NODE 455.00 IS CODE = 11 ---------------------------------------------------------------------------- >>>>>CONFLUENCE MEMORY BANK # 2 WITH THE MAIN-STREAM MEMORY<<<<< ============================================================================ ** MAIN STREAM CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 83.43 6.61 1.929 0.22( 0.22) 1.00 45.7 32.00
2 91.98 8.27 1.696 0.22( 0.22) 1.00 60.4 26.00
3 96.05 9.33 1.582 0.22( 0.22) 1.00 69.7 13.00
4 95.96 9.81 1.537 0.22( 0.22) 1.00 72.5 10.00
5 95.81 11.91 1.376 0.22( 0.22) 1.00 83.9 23.00
6 95.61 11.96 1.372 0.22( 0.22) 1.00 84.0 21.00
LONGEST FLOWPATH FROM NODE 21.00 TO NODE 455.00 = 4156.00 FEET. ** MEMORY BANK # 2 CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 86.91 13.10 1.302 0.24( 0.21) 0.87 86.6 425.00
2 87.52 18.01 1.085 0.24( 0.21) 0.88 109.7 400.00
LONGEST FLOWPATH FROM NODE 400.00 TO NODE 455.00 = 5348.00 FEET. ** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 152.40 6.61 1.929 0.23( 0.22) 0.94 89.4 32.00
2 166.58 8.27 1.696 0.23( 0.22) 0.94 115.0 26.00
3 173.80 9.33 1.582 0.23( 0.22) 0.94 131.4 13.00
4 175.04 9.81 1.537 0.23( 0.22) 0.94 137.4 10.00
5 180.10 11.91 1.376 0.23( 0.22) 0.94 162.6 23.00
6 180.02 11.96 1.372 0.23( 0.22) 0.94 163.0 21.00
7 176.69 13.10 1.302 0.23( 0.22) 0.93 170.6 425.00
8 159.24 18.01 1.085 0.23( 0.22) 0.93 193.7 400.00
TOTAL AREA(ACRES) = 193.7
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 180.10 Tc(MIN.) = 11.908
EFFECTIVE AREA(ACRES) = 162.58 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.23 AREA-AVERAGED Ap = 0.94 TOTAL AREA(ACRES) = 193.7
LONGEST FLOWPATH FROM NODE 400.00 TO NODE 455.00 = 5348.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 455.00 TO NODE 455.00 IS CODE = 12 ---------------------------------------------------------------------------- >>>>>CLEAR MEMORY BANK # 2 <<<<<
============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 455.00 TO NODE 455.00 IS CODE = 10 ---------------------------------------------------------------------------- >>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 2 <<<<< ============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 41.00 TO NODE 42.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< ============================================================================ INITIAL SUBAREA FLOW-LENGTH(FEET) = 329.00
ELEVATION DATA: UPSTREAM(FEET) = 860.00 DOWNSTREAM(FEET) = 715.00 Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 6.284
* 2 YEAR RAINFALL INTENSITY(INCH/HR) = 1.985
SUBAREA Tc AND LOSS RATE DATA(AMC I ):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
NATURAL POOR COVER
"BARREN" C 2.22 0.25 1.000 80 6.28
NATURAL POOR COVER
"BARREN" D 1.21 0.20 1.000 83 6.28
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.23
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
SUBAREA RUNOFF(CFS) = 5.41
TOTAL AREA(ACRES) = 3.43 PEAK FLOW RATE(CFS) = 5.41
**************************************************************************** FLOW PROCESS FROM NODE 42.00 TO NODE 43.00 IS CODE = 51 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 715.00 DOWNSTREAM(FEET) = 640.00 CHANNEL LENGTH THRU SUBAREA(FEET) = 581.00 CHANNEL SLOPE = 0.1291 CHANNEL BASE(FEET) = 0.00 "Z" FACTOR = 2.500
MANNING'S FACTOR = 0.030 MAXIMUM DEPTH(FEET) = 10.00
* 2 YEAR RAINFALL INTENSITY(INCH/HR) = 1.799
SUBAREA LOSS RATE DATA(AMC I ):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" C 0.75 0.25 1.000 80
NATURAL POOR COVER
"BARREN" D 5.02 0.20 1.000 83
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.21
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 9.55
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 8.22 AVERAGE FLOW DEPTH(FEET) = 0.68 TRAVEL TIME(MIN.) = 1.18 Tc(MIN.) = 7.46
SUBAREA AREA(ACRES) = 5.77 SUBAREA RUNOFF(CFS) = 8.27
EFFECTIVE AREA(ACRES) = 9.20 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.22 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 9.2 PEAK FLOW RATE(CFS) = 13.11
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 0.77 FLOW VELOCITY(FEET/SEC.) = 8.94
LONGEST FLOWPATH FROM NODE 41.00 TO NODE 43.00 = 910.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 43.00 TO NODE 44.00 IS CODE = 51 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 640.00 DOWNSTREAM(FEET) = 630.00 CHANNEL LENGTH THRU SUBAREA(FEET) = 452.00 CHANNEL SLOPE = 0.0221 CHANNEL BASE(FEET) = 0.00 "Z" FACTOR = 2.500
MANNING'S FACTOR = 0.030 MAXIMUM DEPTH(FEET) = 10.00
* 2 YEAR RAINFALL INTENSITY(INCH/HR) = 1.619
SUBAREA LOSS RATE DATA(AMC I ):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" A 1.26 0.40 1.000 61
NATURAL POOR COVER
"BARREN" C 4.83 0.25 1.000 80
NATURAL POOR COVER
"BARREN" D 2.48 0.20 1.000 83
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.26
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 18.36
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 5.02 AVERAGE FLOW DEPTH(FEET) = 1.21 TRAVEL TIME(MIN.) = 1.50 Tc(MIN.) = 8.96
SUBAREA AREA(ACRES) = 8.57 SUBAREA RUNOFF(CFS) = 10.50
EFFECTIVE AREA(ACRES) = 17.77 AREA-AVERAGED Fm(INCH/HR) = 0.24 AREA-AVERAGED Fp(INCH/HR) = 0.24 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 17.8 PEAK FLOW RATE(CFS) = 22.12
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 1.30 FLOW VELOCITY(FEET/SEC.) = 5.24
LONGEST FLOWPATH FROM NODE 41.00 TO NODE 44.00 = 1362.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 44.00 TO NODE 45.00 IS CODE = 51 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 630.00 DOWNSTREAM(FEET) = 611.20 CHANNEL LENGTH THRU SUBAREA(FEET) = 495.00 CHANNEL SLOPE = 0.0380 CHANNEL BASE(FEET) = 0.00 "Z" FACTOR = 2.500
MANNING'S FACTOR = 0.030 MAXIMUM DEPTH(FEET) = 10.00
* 2 YEAR RAINFALL INTENSITY(INCH/HR) = 1.501
SUBAREA LOSS RATE DATA(AMC I ):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" A 0.52 0.40 1.000 61
NATURAL POOR COVER
"BARREN" C 1.76 0.25 1.000 80
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.28
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 23.37
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 6.55 AVERAGE FLOW DEPTH(FEET) = 1.19 TRAVEL TIME(MIN.) = 1.26 Tc(MIN.) = 10.22
SUBAREA AREA(ACRES) = 2.28 SUBAREA RUNOFF(CFS) = 2.50
EFFECTIVE AREA(ACRES) = 20.05 AREA-AVERAGED Fm(INCH/HR) = 0.24 AREA-AVERAGED Fp(INCH/HR) = 0.24 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 20.1 PEAK FLOW RATE(CFS) = 22.73
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 1.19 FLOW VELOCITY(FEET/SEC.) = 6.47
LONGEST FLOWPATH FROM NODE 41.00 TO NODE 45.00 = 1857.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 45.00 TO NODE 455.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 611.20 DOWNSTREAM(FEET) = 607.29 FLOW LENGTH(FEET) = 172.00 MANNING'S N = 0.013
DEPTH OF FLOW IN 24.0 INCH PIPE IS 14.8 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 11.15
ESTIMATED PIPE DIAMETER(INCH) = 24.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 22.73
PIPE TRAVEL TIME(MIN.) = 0.26 Tc(MIN.) = 10.48
LONGEST FLOWPATH FROM NODE 41.00 TO NODE 455.00 = 2029.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 455.00 TO NODE 455.00 IS CODE = 11 ---------------------------------------------------------------------------- >>>>>CONFLUENCE MEMORY BANK # 2 WITH THE MAIN-STREAM MEMORY<<<<< ============================================================================ ** MAIN STREAM CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 22.73 10.48 1.480 0.24( 0.24) 1.00 20.1 41.00
LONGEST FLOWPATH FROM NODE 41.00 TO NODE 455.00 = 2029.00 FEET. ** MEMORY BANK # 2 CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 152.40 6.61 1.929 0.23( 0.22) 0.94 89.4 32.00
2 166.58 8.27 1.696 0.23( 0.22) 0.94 115.0 26.00
3 173.80 9.33 1.582 0.23( 0.22) 0.94 131.4 13.00
4 175.04 9.81 1.537 0.23( 0.22) 0.94 137.4 10.00
5 180.10 11.91 1.376 0.23( 0.22) 0.94 162.6 23.00
6 180.02 11.96 1.372 0.23( 0.22) 0.94 163.0 21.00
7 176.69 13.10 1.302 0.23( 0.22) 0.93 170.6 425.00
8 159.24 18.01 1.085 0.23( 0.22) 0.93 193.7 400.00
LONGEST FLOWPATH FROM NODE 400.00 TO NODE 455.00 = 5348.00 FEET. ** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 171.93 6.61 1.929 0.23( 0.22) 0.94 102.0 32.00
2 187.64 8.27 1.696 0.23( 0.22) 0.94 130.9 26.00
3 195.71 9.33 1.582 0.23( 0.22) 0.95 149.2 13.00
4 197.30 9.81 1.537 0.23( 0.22) 0.95 156.2 10.00
5 199.39 10.48 1.480 0.23( 0.22) 0.94 165.5 41.00
6 200.92 11.91 1.376 0.23( 0.22) 0.94 182.6 23.00
7 200.77 11.96 1.372 0.23( 0.22) 0.94 183.1 21.00
8 196.16 13.10 1.302 0.23( 0.22) 0.94 190.6 425.00
9 174.72 18.01 1.085 0.23( 0.22) 0.94 213.8 400.00
TOTAL AREA(ACRES) = 213.8
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 200.92 Tc(MIN.) = 11.908
EFFECTIVE AREA(ACRES) = 182.63 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.23 AREA-AVERAGED Ap = 0.94 TOTAL AREA(ACRES) = 213.8
LONGEST FLOWPATH FROM NODE 400.00 TO NODE 455.00 = 5348.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 455.00 TO NODE 455.00 IS CODE = 12 ---------------------------------------------------------------------------- >>>>>CLEAR MEMORY BANK # 2 <<<<<
============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 455.00 TO NODE 460.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 607.29 DOWNSTREAM(FEET) = 503.97 FLOW LENGTH(FEET) = 1400.00 MANNING'S N = 0.013
DEPTH OF FLOW IN 39.0 INCH PIPE IS 30.2 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 29.17
ESTIMATED PIPE DIAMETER(INCH) = 39.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 200.92
PIPE TRAVEL TIME(MIN.) = 0.80 Tc(MIN.) = 12.71
LONGEST FLOWPATH FROM NODE 400.00 TO NODE 460.00 = 6748.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 455.00 TO NODE 460.00 IS CODE = 81 ---------------------------------------------------------------------------- >>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================ MAINLINE Tc(MIN.) = 12.71
* 2 YEAR RAINFALL INTENSITY(INCH/HR) = 1.325
SUBAREA LOSS RATE DATA(AMC I ):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
USER-DEFINED - 0.24 0.40 0.100 -
USER-DEFINED - 3.80 0.20 0.100 -
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.21
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA AREA(ACRES) = 4.04 SUBAREA RUNOFF(CFS) = 4.74
EFFECTIVE AREA(ACRES) = 186.67 AREA-AVERAGED Fm(INCH/HR) = 0.21 AREA-AVERAGED Fp(INCH/HR) = 0.23 AREA-AVERAGED Ap = 0.93 TOTAL AREA(ACRES) = 217.8 PEAK FLOW RATE(CFS) = 200.92
NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE
**************************************************************************** FLOW PROCESS FROM NODE 465.00 TO NODE 460.00 IS CODE = 81 ---------------------------------------------------------------------------- >>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================ MAINLINE Tc(MIN.) = 12.71
* 2 YEAR RAINFALL INTENSITY(INCH/HR) = 1.325
SUBAREA LOSS RATE DATA(AMC I ):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" A 1.64 0.40 1.000 61
NATURAL POOR COVER
"BARREN" D 2.45 0.20 1.000 83
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.28
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
SUBAREA AREA(ACRES) = 4.09 SUBAREA RUNOFF(CFS) = 3.85
EFFECTIVE AREA(ACRES) = 190.76 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.23 AREA-AVERAGED Ap = 0.93 TOTAL AREA(ACRES) = 221.9 PEAK FLOW RATE(CFS) = 200.92
NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE
**************************************************************************** FLOW PROCESS FROM NODE 460.00 TO NODE 470.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 503.97 DOWNSTREAM(FEET) = 444.42 FLOW LENGTH(FEET) = 1182.00 MANNING'S N = 0.013
DEPTH OF FLOW IN 42.0 INCH PIPE IS 32.3 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 25.31
ESTIMATED PIPE DIAMETER(INCH) = 42.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 200.92
PIPE TRAVEL TIME(MIN.) = 0.78 Tc(MIN.) = 13.49
LONGEST FLOWPATH FROM NODE 400.00 TO NODE 470.00 = 7930.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 460.00 TO NODE 470.00 IS CODE = 81 ---------------------------------------------------------------------------- >>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================ MAINLINE Tc(MIN.) = 13.49
* 2 YEAR RAINFALL INTENSITY(INCH/HR) = 1.281
SUBAREA LOSS RATE DATA(AMC I ):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
USER-DEFINED - 3.53 0.20 0.100 -
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.20
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA AREA(ACRES) = 3.53 SUBAREA RUNOFF(CFS) = 4.01
EFFECTIVE AREA(ACRES) = 194.29 AREA-AVERAGED Fm(INCH/HR) = 0.21 AREA-AVERAGED Fp(INCH/HR) = 0.23 AREA-AVERAGED Ap = 0.91 TOTAL AREA(ACRES) = 225.4 PEAK FLOW RATE(CFS) = 200.92
NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE
**************************************************************************** FLOW PROCESS FROM NODE 470.00 TO NODE 470.00 IS CODE = 11 ---------------------------------------------------------------------------- >>>>>CONFLUENCE MEMORY BANK # 1 WITH THE MAIN-STREAM MEMORY<<<<< ============================================================================ ** MAIN STREAM CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 171.93 8.24 1.699 0.23( 0.21) 0.89 113.7 32.00
2 187.64 9.86 1.533 0.23( 0.21) 0.90 142.5 26.00
3 195.71 10.92 1.446 0.23( 0.21) 0.91 160.9 13.00
4 197.30 11.39 1.411 0.23( 0.21) 0.91 167.8 10.00
5 199.39 12.06 1.366 0.23( 0.21) 0.91 177.1 41.00
6 200.92 13.49 1.281 0.23( 0.21) 0.91 194.3 23.00
7 200.77 13.54 1.278 0.23( 0.21) 0.91 194.7 21.00
8 196.16 14.68 1.220 0.23( 0.21) 0.91 202.3 425.00
9 174.72 19.64 1.032 0.23( 0.21) 0.91 225.4 400.00
LONGEST FLOWPATH FROM NODE 400.00 TO NODE 470.00 = 7930.00 FEET. ** MEMORY BANK # 1 CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 90.65 12.97 1.310 0.24( 0.21) 0.88 82.1 370.00
2 93.95 15.99 1.162 0.24( 0.21) 0.88 100.2 360.00
3 93.96 16.30 1.149 0.24( 0.21) 0.88 101.7 381.00
4 93.53 16.77 1.130 0.24( 0.21) 0.88 103.5 390.00
5 92.26 18.08 1.082 0.24( 0.21) 0.88 108.3 315.00
6 89.32 19.15 1.047 0.24( 0.21) 0.88 109.7 300.00
7 81.60 22.40 0.957 0.24( 0.21) 0.88 113.1 340.00
LONGEST FLOWPATH FROM NODE 300.00 TO NODE 470.00 = 4805.00 FEET. ** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 249.88 8.24 1.699 0.23( 0.21) 0.89 165.9 32.00
2 270.50 9.86 1.533 0.23( 0.21) 0.90 204.9 26.00
3 281.44 10.92 1.446 0.23( 0.21) 0.90 230.0 13.00
4 284.23 11.39 1.411 0.23( 0.21) 0.90 239.9 10.00
5 287.95 12.06 1.366 0.23( 0.21) 0.90 253.5 41.00
6 291.01 12.97 1.310 0.23( 0.21) 0.90 270.2 370.00
7 292.13 13.49 1.281 0.23( 0.21) 0.90 279.5 23.00
8 292.04 13.54 1.278 0.23( 0.21) 0.90 280.2 21.00
9 288.69 14.68 1.220 0.23( 0.21) 0.90 294.7 425.00
10 284.48 15.99 1.162 0.23( 0.21) 0.90 308.6 360.00
11 283.13 16.30 1.149 0.23( 0.21) 0.90 311.6 381.00
12 280.67 16.77 1.130 0.23( 0.21) 0.90 315.6 390.00
13 273.73 18.08 1.082 0.24( 0.21) 0.90 326.5 315.00
14 266.15 19.15 1.047 0.24( 0.21) 0.90 332.8 300.00
15 262.88 19.64 1.032 0.24( 0.21) 0.90 335.6 400.00
16 240.29 22.40 0.957 0.24( 0.21) 0.90 338.5 340.00
TOTAL AREA(ACRES) = 338.5
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 292.13 Tc(MIN.) = 13.486
EFFECTIVE AREA(ACRES) = 279.47 AREA-AVERAGED Fm(INCH/HR) = 0.21 AREA-AVERAGED Fp(INCH/HR) = 0.23 AREA-AVERAGED Ap = 0.90 TOTAL AREA(ACRES) = 338.5
LONGEST FLOWPATH FROM NODE 400.00 TO NODE 470.00 = 7930.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 470.00 TO NODE 470.00 IS CODE = 12 ---------------------------------------------------------------------------- >>>>>CLEAR MEMORY BANK # 1 <<<<<
============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 470.00 TO NODE 475.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 444.42 DOWNSTREAM(FEET) = 435.96 FLOW LENGTH(FEET) = 383.00 MANNING'S N = 0.013
DEPTH OF FLOW IN 57.0 INCH PIPE IS 42.8 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 20.49
ESTIMATED PIPE DIAMETER(INCH) = 57.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 292.13
PIPE TRAVEL TIME(MIN.) = 0.31 Tc(MIN.) = 13.80
LONGEST FLOWPATH FROM NODE 400.00 TO NODE 475.00 = 8313.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 470.00 TO NODE 475.00 IS CODE = 81 ---------------------------------------------------------------------------- >>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================ MAINLINE Tc(MIN.) = 13.80
* 2 YEAR RAINFALL INTENSITY(INCH/HR) = 1.264
SUBAREA LOSS RATE DATA(AMC I ):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
USER-DEFINED - 1.05 0.20 0.100 -
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.20
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA AREA(ACRES) = 1.05 SUBAREA RUNOFF(CFS) = 1.18
EFFECTIVE AREA(ACRES) = 280.52 AREA-AVERAGED Fm(INCH/HR) = 0.21 AREA-AVERAGED Fp(INCH/HR) = 0.23 AREA-AVERAGED Ap = 0.90 TOTAL AREA(ACRES) = 339.5 PEAK FLOW RATE(CFS) = 292.13
NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE
**************************************************************************** FLOW PROCESS FROM NODE 475.00 TO NODE 480.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 435.96 DOWNSTREAM(FEET) = 415.33 FLOW LENGTH(FEET) = 279.00 MANNING'S N = 0.013
DEPTH OF FLOW IN 45.0 INCH PIPE IS 34.6 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 32.10
ESTIMATED PIPE DIAMETER(INCH) = 45.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 292.13
PIPE TRAVEL TIME(MIN.) = 0.14 Tc(MIN.) = 13.94
LONGEST FLOWPATH FROM NODE 400.00 TO NODE 480.00 = 8592.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 500.00 TO NODE 501.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< ============================================================================ INITIAL SUBAREA FLOW-LENGTH(FEET) = 186.00
ELEVATION DATA: UPSTREAM(FEET) = 584.02 DOWNSTREAM(FEET) = 508.34 Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 5.082
* 2 YEAR RAINFALL INTENSITY(INCH/HR) = 2.243
SUBAREA Tc AND LOSS RATE DATA(AMC I ):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
NATURAL POOR COVER
"BARREN" A 2.50 0.40 1.000 61 5.08
NATURAL POOR COVER
"BARREN" C 0.32 0.25 1.000 80 5.08
NATURAL POOR COVER
"BARREN" D 1.77 0.20 1.000 83 5.08
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.31
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
SUBAREA RUNOFF(CFS) = 7.97
TOTAL AREA(ACRES) = 4.59 PEAK FLOW RATE(CFS) = 7.97
**************************************************************************** FLOW PROCESS FROM NODE 501.00 TO NODE 505.00 IS CODE = 51 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 508.34 DOWNSTREAM(FEET) = 492.05 CHANNEL LENGTH THRU SUBAREA(FEET) = 228.00 CHANNEL SLOPE = 0.0714 CHANNEL BASE(FEET) = 0.00 "Z" FACTOR = 2.500
MANNING'S FACTOR = 0.030 MAXIMUM DEPTH(FEET) = 10.00
* 2 YEAR RAINFALL INTENSITY(INCH/HR) = 2.110
SUBAREA LOSS RATE DATA(AMC I ):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" A 2.88 0.40 1.000 61
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 10.19
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 6.68 AVERAGE FLOW DEPTH(FEET) = 0.78 TRAVEL TIME(MIN.) = 0.57 Tc(MIN.) = 5.65
SUBAREA AREA(ACRES) = 2.88 SUBAREA RUNOFF(CFS) = 4.43
EFFECTIVE AREA(ACRES) = 7.47 AREA-AVERAGED Fm(INCH/HR) = 0.35 AREA-AVERAGED Fp(INCH/HR) = 0.35 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 7.5 PEAK FLOW RATE(CFS) = 11.86
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 0.83 FLOW VELOCITY(FEET/SEC.) = 6.94
LONGEST FLOWPATH FROM NODE 500.00 TO NODE 505.00 = 414.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 600.00 TO NODE 605.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< ============================================================================ INITIAL SUBAREA FLOW-LENGTH(FEET) = 309.00
ELEVATION DATA: UPSTREAM(FEET) = 652.62 DOWNSTREAM(FEET) = 561.68 Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 6.643
* 2 YEAR RAINFALL INTENSITY(INCH/HR) = 1.923
SUBAREA Tc AND LOSS RATE DATA(AMC I ):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
NATURAL POOR COVER
"BARREN" C 1.89 0.25 1.000 80 6.64
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
SUBAREA RUNOFF(CFS) = 2.85
TOTAL AREA(ACRES) = 1.89 PEAK FLOW RATE(CFS) = 2.85
**************************************************************************** FLOW PROCESS FROM NODE 605.00 TO NODE 610.00 IS CODE = 56 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 561.68 DOWNSTREAM(FEET) = 451.03 CHANNEL LENGTH THRU SUBAREA(FEET) = 868.00 CHANNEL SLOPE = 0.1275 GIVEN CHANNEL BASE(FEET) = 10.00 CHANNEL FREEBOARD(FEET) = 0.0 "Z" FACTOR = 2.500 MANNING'S FACTOR = 0.030
*ESTIMATED CHANNEL HEIGHT(FEET) = 0.21
* 2 YEAR RAINFALL INTENSITY(INCH/HR) = 1.592
SUBAREA LOSS RATE DATA(AMC I ):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" C 13.84 0.25 1.000 80
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 11.32
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 5.58 AVERAGE FLOW DEPTH(FEET) = 0.19 TRAVEL TIME(MIN.) = 2.59 Tc(MIN.) = 9.24
SUBAREA AREA(ACRES) = 13.84 SUBAREA RUNOFF(CFS) = 16.71 EFFECTIVE AREA(ACRES) = 15.73 AREA-AVERAGED Fm(INCH/HR) = 0.25 AREA-AVERAGED Fp(INCH/HR) = 0.25 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 15.7 PEAK FLOW RATE(CFS) = 18.99
GIVEN CHANNEL BASE(FEET) = 10.00 CHANNEL FREEBOARD(FEET) = 0.0 "Z" FACTOR = 2.500 MANNING'S FACTOR = 0.030
*ESTIMATED CHANNEL HEIGHT(FEET) = 0.26
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 0.26 FLOW VELOCITY(FEET/SEC.) = 6.80
LONGEST FLOWPATH FROM NODE 600.00 TO NODE 610.00 = 1177.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 700.00 TO NODE 701.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< ============================================================================ INITIAL SUBAREA FLOW-LENGTH(FEET) = 194.00
ELEVATION DATA: UPSTREAM(FEET) = 820.48 DOWNSTREAM(FEET) = 754.03 Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 5.350
* 2 YEAR RAINFALL INTENSITY(INCH/HR) = 2.178
SUBAREA Tc AND LOSS RATE DATA(AMC I ):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
NATURAL POOR COVER
"BARREN" C 0.13 0.25 1.000 80 5.35
NATURAL POOR COVER
"BARREN" D 0.54 0.20 1.000 83 5.35
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.21
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
SUBAREA RUNOFF(CFS) = 1.19
TOTAL AREA(ACRES) = 0.67 PEAK FLOW RATE(CFS) = 1.19
**************************************************************************** FLOW PROCESS FROM NODE 701.00 TO NODE 705.00 IS CODE = 56 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 754.03 DOWNSTREAM(FEET) = 622.26 CHANNEL LENGTH THRU SUBAREA(FEET) = 668.00 CHANNEL SLOPE = 0.1973 GIVEN CHANNEL BASE(FEET) = 10.00 CHANNEL FREEBOARD(FEET) = 0.0 "Z" FACTOR = 2.500 MANNING'S FACTOR = 0.030
*ESTIMATED CHANNEL HEIGHT(FEET) = 0.08
* 2 YEAR RAINFALL INTENSITY(INCH/HR) = 1.693
SUBAREA LOSS RATE DATA(AMC I ):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" C 0.34 0.25 1.000 80
NATURAL POOR COVER
"BARREN" D 2.08 0.20 1.000 83
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.21
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 2.83
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 3.78 AVERAGE FLOW DEPTH(FEET) = 0.07 TRAVEL TIME(MIN.) = 2.94 Tc(MIN.) = 8.29
SUBAREA AREA(ACRES) = 2.42 SUBAREA RUNOFF(CFS) = 3.24
EFFECTIVE AREA(ACRES) = 3.09 AREA-AVERAGED Fm(INCH/HR) = 0.21 AREA-AVERAGED Fp(INCH/HR) = 0.21 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 3.1 PEAK FLOW RATE(CFS) = 4.13
GIVEN CHANNEL BASE(FEET) = 10.00 CHANNEL FREEBOARD(FEET) = 0.0 "Z" FACTOR = 2.500 MANNING'S FACTOR = 0.030
*ESTIMATED CHANNEL HEIGHT(FEET) = 0.09
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 0.09 FLOW VELOCITY(FEET/SEC.) = 4.27
LONGEST FLOWPATH FROM NODE 700.00 TO NODE 705.00 = 862.00 FEET. ============================================================================ END OF STUDY SUMMARY:
TOTAL AREA(ACRES) = 3.1 TC(MIN.) = 8.29
EFFECTIVE AREA(ACRES) = 3.09 AREA-AVERAGED Fm(INCH/HR)= 0.21 AREA-AVERAGED Fp(INCH/HR) = 0.21 AREA-AVERAGED Ap = 1.000 PEAK FLOW RATE(CFS) = 4.13
============================================================================ ============================================================================
END OF RATIONAL METHOD ANALYSIS
____________________________________________________________________________ ****************************************************************************
RATIONAL METHOD HYDROLOGY COMPUTER PROGRAM PACKAGE
(Reference: 1986 ORANGE COUNTY HYDROLOGY CRITERION)
(c) Copyright 1983-2014 Advanced Engineering Software (aes) Ver. 21.0 Release Date: 06/01/2014 License ID 1202
Analysis prepared by:
Huitt-Zollars, Inc.
2603 Main Street, Suite 400
Irvine, CA 92614
Tel - 949-988-5815
************************** DESCRIPTION OF STUDY ************************** * GYPSUM CANYON CEMETERY WITH OFFSITE FLOW *
* PROPOSED CONDITION - 10 YEAR STORM EVENT *
* HHTUN REV CGULLIXSON *
************************************************************************** FILE NAME: GCP_10.DAT
TIME/DATE OF STUDY: 10:02 10/04/2023
============================================================================ USER SPECIFIED HYDROLOGY AND HYDRAULIC MODEL INFORMATION:
============================================================================ --*TIME-OF-CONCENTRATION MODEL*--
USER SPECIFIED STORM EVENT(YEAR) = 10.00
SPECIFIED MINIMUM PIPE SIZE(INCH) = 12.00
SPECIFIED PERCENT OF GRADIENTS(DECIMAL) TO USE FOR FRICTION SLOPE = 0.90 *DATA BANK RAINFALL USED*
*ANTECEDENT MOISTURE CONDITION (AMC) II ASSUMED FOR RATIONAL METHOD* *USER-DEFINED STREET-SECTIONS FOR COUPLED PIPEFLOW AND STREETFLOW MODEL* HALF- CROWN TO STREET-CROSSFALL: CURB GUTTER-GEOMETRIES: MANNING
WIDTH CROSSFALL IN- / OUT-/PARK- HEIGHT WIDTH LIP HIKE FACTOR NO. (FT) (FT) SIDE / SIDE/ WAY (FT) (FT) (FT) (FT) (n)
=== ===== ========= ================= ====== ===== ====== ===== ======= 1 32.0 16.0 0.018/0.018/0.020 0.67 2.00 0.0312 0.167 0.0150 GLOBAL STREET FLOW-DEPTH CONSTRAINTS:
1. Relative Flow-Depth = 0.00 FEET
as (Maximum Allowable Street Flow Depth) - (Top-of-Curb)
2. (Depth)*(Velocity) Constraint = 6.0 (FT*FT/S)
*SIZE PIPE WITH A FLOW CAPACITY GREATER THAN
OR EQUAL TO THE UPSTREAM TRIBUTARY PIPE.*
*USER-SPECIFIED MINIMUM TOPOGRAPHIC SLOPE ADJUSTMENT NOT SELECTED **************************************************************************** FLOW PROCESS FROM NODE 100.00 TO NODE 105.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< ============================================================================ INITIAL SUBAREA FLOW-LENGTH(FEET) = 103.00
ELEVATION DATA: UPSTREAM(FEET) = 450.02 DOWNSTREAM(FEET) = 417.40 Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 5.000
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 4.060
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
NATURAL POOR COVER
"BARREN" C 4.20 0.25 1.000 91 5.00
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
SUBAREA RUNOFF(CFS) = 14.40
TOTAL AREA(ACRES) = 4.20 PEAK FLOW RATE(CFS) = 14.40
**************************************************************************** FLOW PROCESS FROM NODE 200.00 TO NODE 205.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< ============================================================================ INITIAL SUBAREA FLOW-LENGTH(FEET) = 389.00
ELEVATION DATA: UPSTREAM(FEET) = 443.03 DOWNSTREAM(FEET) = 406.00 Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 9.129
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.875
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
NATURAL POOR COVER
"BARREN" A 0.62 0.40 1.000 78 9.13
NATURAL POOR COVER
"BARREN" B 0.27 0.30 1.000 86 9.13
NATURAL POOR COVER
"BARREN" C 0.35 0.25 1.000 91 9.13
NATURAL POOR COVER
"BARREN" D 7.62 0.20 1.000 93 9.13
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.22
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
SUBAREA RUNOFF(CFS) = 21.18
TOTAL AREA(ACRES) = 8.86 PEAK FLOW RATE(CFS) = 21.18
**************************************************************************** FLOW PROCESS FROM NODE 300.00 TO NODE 301.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< ============================================================================ INITIAL SUBAREA FLOW-LENGTH(FEET) = 235.00
ELEVATION DATA: UPSTREAM(FEET) = 642.77 DOWNSTREAM(FEET) = 562.32 Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 7.769
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 3.154
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
URBAN GOOD COVER
"TURF" - 0.69 0.25 0.900 93 7.77
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.900
SUBAREA RUNOFF(CFS) = 1.82
TOTAL AREA(ACRES) = 0.69 PEAK FLOW RATE(CFS) = 1.82
**************************************************************************** FLOW PROCESS FROM NODE 301.00 TO NODE 305.00 IS CODE = 51 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 562.32 DOWNSTREAM(FEET) = 474.58 CHANNEL LENGTH THRU SUBAREA(FEET) = 226.00 CHANNEL SLOPE = 0.3882 CHANNEL BASE(FEET) = 0.00 "Z" FACTOR = 3.000
MANNING'S FACTOR = 0.013 MAXIMUM DEPTH(FEET) = 10.00
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 3.105
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
USER-DEFINED - 1.29 0.25 0.900 -
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.900
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 3.49
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 17.68 AVERAGE FLOW DEPTH(FEET) = 0.26 TRAVEL TIME(MIN.) = 0.21 Tc(MIN.) = 7.98
SUBAREA AREA(ACRES) = 1.29 SUBAREA RUNOFF(CFS) = 3.34
EFFECTIVE AREA(ACRES) = 1.98 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.25 AREA-AVERAGED Ap = 0.90 TOTAL AREA(ACRES) = 2.0 PEAK FLOW RATE(CFS) = 5.13
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 0.30 FLOW VELOCITY(FEET/SEC.) = 18.96
LONGEST FLOWPATH FROM NODE 300.00 TO NODE 305.00 = 461.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 305.00 TO NODE 306.00 IS CODE = 51 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 474.58 DOWNSTREAM(FEET) = 468.10 CHANNEL LENGTH THRU SUBAREA(FEET) = 356.00 CHANNEL SLOPE = 0.0182 CHANNEL BASE(FEET) = 0.00 "Z" FACTOR = 3.000
MANNING'S FACTOR = 0.013 MAXIMUM DEPTH(FEET) = 10.00
CHANNEL FLOW THRU SUBAREA(CFS) = 5.13
FLOW VELOCITY(FEET/SEC.) = 6.11 FLOW DEPTH(FEET) = 0.53 TRAVEL TIME(MIN.) = 0.97 Tc(MIN.) = 8.95
LONGEST FLOWPATH FROM NODE 300.00 TO NODE 306.00 = 817.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 306.00 TO NODE 306.00 IS CODE = 1 ---------------------------------------------------------------------------- >>>>>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE<<<<<
============================================================================ TOTAL NUMBER OF STREAMS = 2
CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 1 ARE:
TIME OF CONCENTRATION(MIN.) = 8.95
RAINFALL INTENSITY(INCH/HR) = 2.91
AREA-AVERAGED Fm(INCH/HR) = 0.22
AREA-AVERAGED Fp(INCH/HR) = 0.25
AREA-AVERAGED Ap = 0.90
EFFECTIVE STREAM AREA(ACRES) = 1.98
TOTAL STREAM AREA(ACRES) = 1.98
PEAK FLOW RATE(CFS) AT CONFLUENCE = 5.13
**************************************************************************** FLOW PROCESS FROM NODE 315.00 TO NODE 316.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< ============================================================================ INITIAL SUBAREA FLOW-LENGTH(FEET) = 243.00
ELEVATION DATA: UPSTREAM(FEET) = 648.21 DOWNSTREAM(FEET) = 563.05 Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 7.836
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 3.138
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
URBAN GOOD COVER
"TURF" - 3.55 0.25 0.900 93 7.84
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.900
SUBAREA RUNOFF(CFS) = 9.31
TOTAL AREA(ACRES) = 3.55 PEAK FLOW RATE(CFS) = 9.31
**************************************************************************** FLOW PROCESS FROM NODE 316.00 TO NODE 306.00 IS CODE = 51 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 563.05 DOWNSTREAM(FEET) = 468.10 CHANNEL LENGTH THRU SUBAREA(FEET) = 442.00 CHANNEL SLOPE = 0.2148 CHANNEL BASE(FEET) = 0.00 "Z" FACTOR = 3.000
MANNING'S FACTOR = 0.013 MAXIMUM DEPTH(FEET) = 10.00
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 3.058
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
USER-DEFINED - 5.08 0.25 0.900 -
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.900
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 15.79
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 20.52 AVERAGE FLOW DEPTH(FEET) = 0.51 TRAVEL TIME(MIN.) = 0.36 Tc(MIN.) = 8.20
SUBAREA AREA(ACRES) = 5.08 SUBAREA RUNOFF(CFS) = 12.96
EFFECTIVE AREA(ACRES) = 8.63 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.25 AREA-AVERAGED Ap = 0.90 TOTAL AREA(ACRES) = 8.6 PEAK FLOW RATE(CFS) = 22.01
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 0.58 FLOW VELOCITY(FEET/SEC.) = 22.18
LONGEST FLOWPATH FROM NODE 315.00 TO NODE 306.00 = 685.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 306.00 TO NODE 306.00 IS CODE = 1 ---------------------------------------------------------------------------- >>>>>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE<<<<<
>>>>>AND COMPUTE VARIOUS CONFLUENCED STREAM VALUES<<<<< ============================================================================ TOTAL NUMBER OF STREAMS = 2
CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 2 ARE:
TIME OF CONCENTRATION(MIN.) = 8.20
RAINFALL INTENSITY(INCH/HR) = 3.06
AREA-AVERAGED Fm(INCH/HR) = 0.22
AREA-AVERAGED Fp(INCH/HR) = 0.25
AREA-AVERAGED Ap = 0.90
EFFECTIVE STREAM AREA(ACRES) = 8.63
TOTAL STREAM AREA(ACRES) = 8.63
PEAK FLOW RATE(CFS) AT CONFLUENCE = 22.01
** CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 5.13 8.95 2.907 0.25( 0.22) 0.90 2.0 300.00
2 22.01 8.20 3.058 0.25( 0.22) 0.90 8.6 315.00
RAINFALL INTENSITY AND TIME OF CONCENTRATION RATIO
CONFLUENCE FORMULA USED FOR 2 STREAMS.
** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 26.97 8.20 3.058 0.25( 0.22) 0.90 10.4 315.00
2 25.97 8.95 2.907 0.25( 0.22) 0.90 10.6 300.00
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 26.97 Tc(MIN.) = 8.20
EFFECTIVE AREA(ACRES) = 10.44 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.25 AREA-AVERAGED Ap = 0.90 TOTAL AREA(ACRES) = 10.6
LONGEST FLOWPATH FROM NODE 300.00 TO NODE 306.00 = 817.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 306.00 TO NODE 310.00 IS CODE = 51 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 468.10 DOWNSTREAM(FEET) = 450.93 CHANNEL LENGTH THRU SUBAREA(FEET) = 828.00 CHANNEL SLOPE = 0.0207 CHANNEL BASE(FEET) = 0.00 "Z" FACTOR = 3.000
MANNING'S FACTOR = 0.013 MAXIMUM DEPTH(FEET) = 10.00
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.805
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
USER-DEFINED - 5.79 0.25 0.900 -
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.900
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 33.70
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 10.34 AVERAGE FLOW DEPTH(FEET) = 1.04 TRAVEL TIME(MIN.) = 1.33 Tc(MIN.) = 9.53
SUBAREA AREA(ACRES) = 5.79 SUBAREA RUNOFF(CFS) = 13.45
EFFECTIVE AREA(ACRES) = 16.23 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.25 AREA-AVERAGED Ap = 0.90 TOTAL AREA(ACRES) = 16.4 PEAK FLOW RATE(CFS) = 37.70
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 1.09 FLOW VELOCITY(FEET/SEC.) = 10.61
LONGEST FLOWPATH FROM NODE 300.00 TO NODE 310.00 = 1645.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 310.00 TO NODE 325.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 446.99 DOWNSTREAM(FEET) = 442.15 FLOW LENGTH(FEET) = 949.00 MANNING'S N = 0.013
DEPTH OF FLOW IN 36.0 INCH PIPE IS 25.1 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 7.15
ESTIMATED PIPE DIAMETER(INCH) = 36.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 37.70
PIPE TRAVEL TIME(MIN.) = 2.21 Tc(MIN.) = 11.74
LONGEST FLOWPATH FROM NODE 300.00 TO NODE 325.00 = 2594.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 310.00 TO NODE 325.00 IS CODE = 81 ---------------------------------------------------------------------------- >>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================ MAINLINE Tc(MIN.) = 11.74
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.489
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
USER-DEFINED - 10.81 0.25 0.900 -
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.900
SUBAREA AREA(ACRES) = 10.81 SUBAREA RUNOFF(CFS) = 22.03 EFFECTIVE AREA(ACRES) = 27.04 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.25 AREA-AVERAGED Ap = 0.90 TOTAL AREA(ACRES) = 27.2 PEAK FLOW RATE(CFS) = 55.11
**************************************************************************** FLOW PROCESS FROM NODE 325.00 TO NODE 330.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 442.15 DOWNSTREAM(FEET) = 435.30 FLOW LENGTH(FEET) = 1427.00 MANNING'S N = 0.013
DEPTH OF FLOW IN 42.0 INCH PIPE IS 29.3 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 7.69
ESTIMATED PIPE DIAMETER(INCH) = 42.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 55.11
PIPE TRAVEL TIME(MIN.) = 3.09 Tc(MIN.) = 14.83
LONGEST FLOWPATH FROM NODE 300.00 TO NODE 330.00 = 4021.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 325.00 TO NODE 330.00 IS CODE = 81 ---------------------------------------------------------------------------- >>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================ MAINLINE Tc(MIN.) = 14.83
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.177
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
USER-DEFINED - 15.23 0.25 0.900 -
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.900
SUBAREA AREA(ACRES) = 15.23 SUBAREA RUNOFF(CFS) = 26.76 EFFECTIVE AREA(ACRES) = 42.27 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.25 AREA-AVERAGED Ap = 0.90 TOTAL AREA(ACRES) = 42.4 PEAK FLOW RATE(CFS) = 74.27
**************************************************************************** FLOW PROCESS FROM NODE 330.00 TO NODE 330.00 IS CODE = 10 ---------------------------------------------------------------------------- >>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 1 <<<<< ============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 340.00 TO NODE 341.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< ============================================================================ INITIAL SUBAREA FLOW-LENGTH(FEET) = 227.00
ELEVATION DATA: UPSTREAM(FEET) = 497.15 DOWNSTREAM(FEET) = 490.66 Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 12.588
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.392
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
URBAN GOOD COVER
"TURF" - 0.64 0.25 0.900 93 12.59
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.900
SUBAREA RUNOFF(CFS) = 1.25
TOTAL AREA(ACRES) = 0.64 PEAK FLOW RATE(CFS) = 1.25
**************************************************************************** FLOW PROCESS FROM NODE 341.00 TO NODE 342.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 486.64 DOWNSTREAM(FEET) = 469.80 FLOW LENGTH(FEET) = 405.00 MANNING'S N = 0.013
ESTIMATED PIPE DIAMETER(INCH) INCREASED TO 12.000
DEPTH OF FLOW IN 12.0 INCH PIPE IS 3.5 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 6.68
ESTIMATED PIPE DIAMETER(INCH) = 12.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 1.25
PIPE TRAVEL TIME(MIN.) = 1.01 Tc(MIN.) = 13.60
LONGEST FLOWPATH FROM NODE 340.00 TO NODE 342.00 = 632.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 341.00 TO NODE 342.00 IS CODE = 81 ---------------------------------------------------------------------------- >>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================ MAINLINE Tc(MIN.) = 13.60
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.288
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
USER-DEFINED - 1.68 0.25 0.900 -
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.900
SUBAREA AREA(ACRES) = 1.68 SUBAREA RUNOFF(CFS) = 3.12
EFFECTIVE AREA(ACRES) = 2.32 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.25 AREA-AVERAGED Ap = 0.90 TOTAL AREA(ACRES) = 2.3 PEAK FLOW RATE(CFS) = 4.31
**************************************************************************** FLOW PROCESS FROM NODE 342.00 TO NODE 342.00 IS CODE = 81 ---------------------------------------------------------------------------- >>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================ MAINLINE Tc(MIN.) = 13.60
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.288
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
USER-DEFINED - 2.86 0.25 0.900 -
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.900
SUBAREA AREA(ACRES) = 2.86 SUBAREA RUNOFF(CFS) = 5.31
EFFECTIVE AREA(ACRES) = 5.18 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.25 AREA-AVERAGED Ap = 0.90 TOTAL AREA(ACRES) = 5.2 PEAK FLOW RATE(CFS) = 9.62
**************************************************************************** FLOW PROCESS FROM NODE 342.00 TO NODE 345.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 469.80 DOWNSTREAM(FEET) = 466.71 FLOW LENGTH(FEET) = 424.00 MANNING'S N = 0.013
DEPTH OF FLOW IN 21.0 INCH PIPE IS 13.6 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 5.85
ESTIMATED PIPE DIAMETER(INCH) = 21.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 9.62
PIPE TRAVEL TIME(MIN.) = 1.21 Tc(MIN.) = 14.81
LONGEST FLOWPATH FROM NODE 340.00 TO NODE 345.00 = 1056.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 342.00 TO NODE 345.00 IS CODE = 81 ---------------------------------------------------------------------------- >>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================ MAINLINE Tc(MIN.) = 14.81
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.179
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
USER-DEFINED - 1.76 0.25 0.900 -
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.900
SUBAREA AREA(ACRES) = 1.76 SUBAREA RUNOFF(CFS) = 3.10
EFFECTIVE AREA(ACRES) = 6.94 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.25 AREA-AVERAGED Ap = 0.90 TOTAL AREA(ACRES) = 6.9 PEAK FLOW RATE(CFS) = 12.21
**************************************************************************** FLOW PROCESS FROM NODE 345.00 TO NODE 350.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 466.71 DOWNSTREAM(FEET) = 460.61 FLOW LENGTH(FEET) = 1241.00 MANNING'S N = 0.013
DEPTH OF FLOW IN 24.0 INCH PIPE IS 16.4 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 5.33
ESTIMATED PIPE DIAMETER(INCH) = 24.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 12.21
PIPE TRAVEL TIME(MIN.) = 3.88 Tc(MIN.) = 18.68
LONGEST FLOWPATH FROM NODE 340.00 TO NODE 350.00 = 2297.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 345.00 TO NODE 350.00 IS CODE = 81 ---------------------------------------------------------------------------- >>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================ MAINLINE Tc(MIN.) = 18.68
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 1.907
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
USER-DEFINED - 4.17 0.25 0.900 -
USER-DEFINED - 9.20 0.20 0.900 -
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.22
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.900
SUBAREA AREA(ACRES) = 13.37 SUBAREA RUNOFF(CFS) = 20.62 EFFECTIVE AREA(ACRES) = 20.31 AREA-AVERAGED Fm(INCH/HR) = 0.20 AREA-AVERAGED Fp(INCH/HR) = 0.23 AREA-AVERAGED Ap = 0.90 TOTAL AREA(ACRES) = 20.3 PEAK FLOW RATE(CFS) = 31.13
**************************************************************************** FLOW PROCESS FROM NODE 350.00 TO NODE 350.00 IS CODE = 81 ---------------------------------------------------------------------------- >>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================ MAINLINE Tc(MIN.) = 18.68
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 1.907
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
USER-DEFINED - 1.36 0.20 0.900 -
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.20
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.900
SUBAREA AREA(ACRES) = 1.36 SUBAREA RUNOFF(CFS) = 2.11
EFFECTIVE AREA(ACRES) = 21.67 AREA-AVERAGED Fm(INCH/HR) = 0.20 AREA-AVERAGED Fp(INCH/HR) = 0.23 AREA-AVERAGED Ap = 0.90 TOTAL AREA(ACRES) = 21.7 PEAK FLOW RATE(CFS) = 33.24
**************************************************************************** FLOW PROCESS FROM NODE 350.00 TO NODE 330.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 460.61 DOWNSTREAM(FEET) = 435.30 FLOW LENGTH(FEET) = 431.00 MANNING'S N = 0.013
DEPTH OF FLOW IN 21.0 INCH PIPE IS 15.8 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 17.16
ESTIMATED PIPE DIAMETER(INCH) = 21.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 33.24
PIPE TRAVEL TIME(MIN.) = 0.42 Tc(MIN.) = 19.10
LONGEST FLOWPATH FROM NODE 340.00 TO NODE 330.00 = 2728.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 330.00 TO NODE 330.00 IS CODE = 11 ---------------------------------------------------------------------------- >>>>>CONFLUENCE MEMORY BANK # 1 WITH THE MAIN-STREAM MEMORY<<<<< ============================================================================ ** MAIN STREAM CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 33.24 19.10 1.883 0.23( 0.20) 0.90 21.7 340.00
LONGEST FLOWPATH FROM NODE 340.00 TO NODE 330.00 = 2728.00 FEET. ** MEMORY BANK # 1 CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 74.27 14.83 2.177 0.25( 0.22) 0.90 42.3 315.00
2 71.85 15.72 2.106 0.25( 0.22) 0.90 42.4 300.00
LONGEST FLOWPATH FROM NODE 300.00 TO NODE 330.00 = 4021.00 FEET. ** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 104.59 14.83 2.177 0.24( 0.22) 0.90 59.1 315.00
2 102.83 15.72 2.106 0.24( 0.22) 0.90 60.3 300.00
3 96.58 19.10 1.883 0.24( 0.22) 0.90 64.1 340.00
TOTAL AREA(ACRES) = 64.1
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 104.59 Tc(MIN.) = 14.834
EFFECTIVE AREA(ACRES) = 59.10 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.24 AREA-AVERAGED Ap = 0.90 TOTAL AREA(ACRES) = 64.1
LONGEST FLOWPATH FROM NODE 300.00 TO NODE 330.00 = 4021.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 330.00 TO NODE 330.00 IS CODE = 12 ---------------------------------------------------------------------------- >>>>>CLEAR MEMORY BANK # 1 <<<<<
============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 330.00 TO NODE 331.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 435.30 DOWNSTREAM(FEET) = 435.08 FLOW LENGTH(FEET) = 45.00 MANNING'S N = 0.013
DEPTH OF FLOW IN 51.0 INCH PIPE IS 39.1 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 8.97
ESTIMATED PIPE DIAMETER(INCH) = 51.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 104.59
PIPE TRAVEL TIME(MIN.) = 0.08 Tc(MIN.) = 14.92
LONGEST FLOWPATH FROM NODE 300.00 TO NODE 331.00 = 4066.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 331.00 TO NODE 331.00 IS CODE = 10 ---------------------------------------------------------------------------- >>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 1 <<<<< ============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 360.00 TO NODE 361.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< ============================================================================ INITIAL SUBAREA FLOW-LENGTH(FEET) = 330.00
ELEVATION DATA: UPSTREAM(FEET) = 642.10 DOWNSTREAM(FEET) = 554.86 Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 9.371
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.832
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
URBAN GOOD COVER
"TURF" - 4.70 0.25 0.900 93 9.37
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.900
SUBAREA RUNOFF(CFS) = 11.03
TOTAL AREA(ACRES) = 4.70 PEAK FLOW RATE(CFS) = 11.03
**************************************************************************** FLOW PROCESS FROM NODE 361.00 TO NODE 362.00 IS CODE = 51 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 554.86 DOWNSTREAM(FEET) = 497.36 CHANNEL LENGTH THRU SUBAREA(FEET) = 346.00 CHANNEL SLOPE = 0.1662 CHANNEL BASE(FEET) = 0.00 "Z" FACTOR = 3.000
MANNING'S FACTOR = 0.013 MAXIMUM DEPTH(FEET) = 10.00
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.779
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
USER-DEFINED - 3.17 0.25 0.900 -
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.900
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 14.67
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 18.38 AVERAGE FLOW DEPTH(FEET) = 0.52 TRAVEL TIME(MIN.) = 0.31 Tc(MIN.) = 9.68
SUBAREA AREA(ACRES) = 3.17 SUBAREA RUNOFF(CFS) = 7.29
EFFECTIVE AREA(ACRES) = 7.87 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.25 AREA-AVERAGED Ap = 0.90 TOTAL AREA(ACRES) = 7.9 PEAK FLOW RATE(CFS) = 18.09
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 0.56 FLOW VELOCITY(FEET/SEC.) = 19.25
LONGEST FLOWPATH FROM NODE 360.00 TO NODE 362.00 = 676.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 362.00 TO NODE 365.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 494.42 DOWNSTREAM(FEET) = 490.67 FLOW LENGTH(FEET) = 749.00 MANNING'S N = 0.013
DEPTH OF FLOW IN 27.0 INCH PIPE IS 19.5 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 5.89
ESTIMATED PIPE DIAMETER(INCH) = 27.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 18.09
PIPE TRAVEL TIME(MIN.) = 2.12 Tc(MIN.) = 11.80
LONGEST FLOWPATH FROM NODE 360.00 TO NODE 365.00 = 1425.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 362.00 TO NODE 365.00 IS CODE = 81 ---------------------------------------------------------------------------- >>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================ MAINLINE Tc(MIN.) = 11.80
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.481
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
USER-DEFINED - 5.36 0.25 0.500 -
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.500
SUBAREA AREA(ACRES) = 5.36 SUBAREA RUNOFF(CFS) = 11.37
EFFECTIVE AREA(ACRES) = 13.23 AREA-AVERAGED Fm(INCH/HR) = 0.18 AREA-AVERAGED Fp(INCH/HR) = 0.25 AREA-AVERAGED Ap = 0.74 TOTAL AREA(ACRES) = 13.2 PEAK FLOW RATE(CFS) = 27.35
**************************************************************************** FLOW PROCESS FROM NODE 365.00 TO NODE 376.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 490.67 DOWNSTREAM(FEET) = 479.26 FLOW LENGTH(FEET) = 253.00 MANNING'S N = 0.013
DEPTH OF FLOW IN 21.0 INCH PIPE IS 15.0 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 14.92
ESTIMATED PIPE DIAMETER(INCH) = 21.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 27.35
PIPE TRAVEL TIME(MIN.) = 0.28 Tc(MIN.) = 12.09
LONGEST FLOWPATH FROM NODE 360.00 TO NODE 376.00 = 1678.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 376.00 TO NODE 376.00 IS CODE = 10 ---------------------------------------------------------------------------- >>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 2 <<<<< ============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 370.00 TO NODE 371.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< ============================================================================ INITIAL SUBAREA FLOW-LENGTH(FEET) = 265.00
ELEVATION DATA: UPSTREAM(FEET) = 632.00 DOWNSTREAM(FEET) = 575.00 Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 8.945
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.909
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
URBAN GOOD COVER
"TURF" - 0.74 0.25 0.900 93 8.94
URBAN GOOD COVER
"TURF" - 2.23 0.20 0.900 93 8.94
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.21
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.900
SUBAREA RUNOFF(CFS) = 7.26
TOTAL AREA(ACRES) = 2.97 PEAK FLOW RATE(CFS) = 7.26
**************************************************************************** FLOW PROCESS FROM NODE 371.00 TO NODE 375.00 IS CODE = 51 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 575.00 DOWNSTREAM(FEET) = 498.11 CHANNEL LENGTH THRU SUBAREA(FEET) = 285.00 CHANNEL SLOPE = 0.2698 CHANNEL BASE(FEET) = 0.00 "Z" FACTOR = 3.000
MANNING'S FACTOR = 0.013 MAXIMUM DEPTH(FEET) = 10.00
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.866
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
USER-DEFINED - 2.37 0.25 0.900 -
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.900
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 10.08
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 20.08 AVERAGE FLOW DEPTH(FEET) = 0.41 TRAVEL TIME(MIN.) = 0.24 Tc(MIN.) = 9.18
SUBAREA AREA(ACRES) = 2.37 SUBAREA RUNOFF(CFS) = 5.63
EFFECTIVE AREA(ACRES) = 5.34 AREA-AVERAGED Fm(INCH/HR) = 0.21 AREA-AVERAGED Fp(INCH/HR) = 0.23 AREA-AVERAGED Ap = 0.90 TOTAL AREA(ACRES) = 5.3 PEAK FLOW RATE(CFS) = 12.78
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 0.45 FLOW VELOCITY(FEET/SEC.) = 21.30
LONGEST FLOWPATH FROM NODE 370.00 TO NODE 375.00 = 550.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 375.00 TO NODE 376.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 494.11 DOWNSTREAM(FEET) = 479.26 FLOW LENGTH(FEET) = 219.00 MANNING'S N = 0.013
DEPTH OF FLOW IN 15.0 INCH PIPE IS 10.2 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 14.45
ESTIMATED PIPE DIAMETER(INCH) = 15.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 12.78
PIPE TRAVEL TIME(MIN.) = 0.25 Tc(MIN.) = 9.43
LONGEST FLOWPATH FROM NODE 370.00 TO NODE 376.00 = 769.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 376.00 TO NODE 376.00 IS CODE = 11 ---------------------------------------------------------------------------- >>>>>CONFLUENCE MEMORY BANK # 2 WITH THE MAIN-STREAM MEMORY<<<<< ============================================================================ ** MAIN STREAM CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 12.78 9.43 2.821 0.23( 0.21) 0.90 5.3 370.00
LONGEST FLOWPATH FROM NODE 370.00 TO NODE 376.00 = 769.00 FEET. ** MEMORY BANK # 2 CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 27.35 12.09 2.448 0.25( 0.18) 0.74 13.2 360.00
LONGEST FLOWPATH FROM NODE 360.00 TO NODE 376.00 = 1678.00 FEET. ** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 37.65 9.43 2.821 0.24( 0.19) 0.79 15.7 370.00
2 38.31 12.09 2.448 0.24( 0.19) 0.78 18.6 360.00
TOTAL AREA(ACRES) = 18.6
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 38.31 Tc(MIN.) = 12.087
EFFECTIVE AREA(ACRES) = 18.57 AREA-AVERAGED Fm(INCH/HR) = 0.19 AREA-AVERAGED Fp(INCH/HR) = 0.24 AREA-AVERAGED Ap = 0.78 TOTAL AREA(ACRES) = 18.6
LONGEST FLOWPATH FROM NODE 360.00 TO NODE 376.00 = 1678.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 376.00 TO NODE 376.00 IS CODE = 12 ---------------------------------------------------------------------------- >>>>>CLEAR MEMORY BANK # 2 <<<<<
============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 376.00 TO NODE 380.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 479.26 DOWNSTREAM(FEET) = 456.49 FLOW LENGTH(FEET) = 508.00 MANNING'S N = 0.013
DEPTH OF FLOW IN 24.0 INCH PIPE IS 16.9 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 16.21
ESTIMATED PIPE DIAMETER(INCH) = 24.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 38.31
PIPE TRAVEL TIME(MIN.) = 0.52 Tc(MIN.) = 12.61
LONGEST FLOWPATH FROM NODE 360.00 TO NODE 380.00 = 2186.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 380.00 TO NODE 380.00 IS CODE = 10 ---------------------------------------------------------------------------- >>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 2 <<<<< ============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 381.00 TO NODE 382.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< ============================================================================ INITIAL SUBAREA FLOW-LENGTH(FEET) = 330.00
ELEVATION DATA: UPSTREAM(FEET) = 565.33 DOWNSTREAM(FEET) = 497.83 Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 9.864
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.750
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
URBAN FAIR COVER
"TURF" - 0.16 0.25 0.900 93 9.86
URBAN FAIR COVER
"TURF" - 0.48 0.25 0.900 93 9.86
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.900
SUBAREA RUNOFF(CFS) = 1.45
TOTAL AREA(ACRES) = 0.64 PEAK FLOW RATE(CFS) = 1.45
**************************************************************************** FLOW PROCESS FROM NODE 382.00 TO NODE 380.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 492.83 DOWNSTREAM(FEET) = 456.49 FLOW LENGTH(FEET) = 1146.00 MANNING'S N = 0.013
ESTIMATED PIPE DIAMETER(INCH) INCREASED TO 12.000
DEPTH OF FLOW IN 12.0 INCH PIPE IS 4.0 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 6.31
ESTIMATED PIPE DIAMETER(INCH) = 12.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 1.45
PIPE TRAVEL TIME(MIN.) = 3.03 Tc(MIN.) = 12.89
LONGEST FLOWPATH FROM NODE 381.00 TO NODE 380.00 = 1476.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 382.00 TO NODE 380.00 IS CODE = 81 ---------------------------------------------------------------------------- >>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================ MAINLINE Tc(MIN.) = 12.89
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.359
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
USER-DEFINED - 3.35 0.25 0.900 -
USER-DEFINED - 10.06 0.25 0.900 -
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.900
SUBAREA AREA(ACRES) = 13.41 SUBAREA RUNOFF(CFS) = 25.76 EFFECTIVE AREA(ACRES) = 14.05 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.25 AREA-AVERAGED Ap = 0.90 TOTAL AREA(ACRES) = 14.1 PEAK FLOW RATE(CFS) = 26.99
**************************************************************************** FLOW PROCESS FROM NODE 380.00 TO NODE 380.00 IS CODE = 11 ---------------------------------------------------------------------------- >>>>>CONFLUENCE MEMORY BANK # 2 WITH THE MAIN-STREAM MEMORY<<<<< ============================================================================ ** MAIN STREAM CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 26.99 12.89 2.359 0.25( 0.22) 0.90 14.1 381.00
LONGEST FLOWPATH FROM NODE 381.00 TO NODE 380.00 = 1476.00 FEET. ** MEMORY BANK # 2 CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 37.65 9.96 2.735 0.24( 0.19) 0.79 15.7 370.00
2 38.31 12.61 2.389 0.24( 0.19) 0.78 18.6 360.00
LONGEST FLOWPATH FROM NODE 360.00 TO NODE 380.00 = 2186.00 FEET. ** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 62.18 9.96 2.735 0.25( 0.21) 0.84 26.5 370.00
2 65.08 12.61 2.389 0.25( 0.21) 0.83 32.3 360.00
3 64.78 12.89 2.359 0.25( 0.21) 0.83 32.6 381.00
TOTAL AREA(ACRES) = 32.6
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 65.08 Tc(MIN.) = 12.609
EFFECTIVE AREA(ACRES) = 32.31 AREA-AVERAGED Fm(INCH/HR) = 0.21 AREA-AVERAGED Fp(INCH/HR) = 0.25 AREA-AVERAGED Ap = 0.83 TOTAL AREA(ACRES) = 32.6
LONGEST FLOWPATH FROM NODE 360.00 TO NODE 380.00 = 2186.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 380.00 TO NODE 380.00 IS CODE = 12 ---------------------------------------------------------------------------- >>>>>CLEAR MEMORY BANK # 2 <<<<<
============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 380.00 TO NODE 380.00 IS CODE = 10 ---------------------------------------------------------------------------- >>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 2 <<<<< ============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 390.00 TO NODE 391.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< ============================================================================ INITIAL SUBAREA FLOW-LENGTH(FEET) = 330.00
ELEVATION DATA: UPSTREAM(FEET) = 625.16 DOWNSTREAM(FEET) = 567.79 Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 10.190
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.700
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
URBAN GOOD COVER
"TURF" - 0.49 0.25 0.900 93 10.19
URBAN GOOD COVER
"TURF" - 1.48 0.20 0.900 93 10.19
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.21
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.900
SUBAREA RUNOFF(CFS) = 4.45
TOTAL AREA(ACRES) = 1.97 PEAK FLOW RATE(CFS) = 4.45
**************************************************************************** FLOW PROCESS FROM NODE 391.00 TO NODE 392.00 IS CODE = 51 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 567.79 DOWNSTREAM(FEET) = 463.11 CHANNEL LENGTH THRU SUBAREA(FEET) = 1332.00 CHANNEL SLOPE = 0.0786 CHANNEL BASE(FEET) = 0.00 "Z" FACTOR = 3.000
MANNING'S FACTOR = 0.013 MAXIMUM DEPTH(FEET) = 10.00
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.431
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
USER-DEFINED - 0.30 0.25 0.900 -
USER-DEFINED - 0.91 0.20 0.900 -
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.21
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.900
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 5.67
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 10.88 AVERAGE FLOW DEPTH(FEET) = 0.42 TRAVEL TIME(MIN.) = 2.04 Tc(MIN.) = 12.23
SUBAREA AREA(ACRES) = 1.21 SUBAREA RUNOFF(CFS) = 2.44
EFFECTIVE AREA(ACRES) = 3.18 AREA-AVERAGED Fm(INCH/HR) = 0.19 AREA-AVERAGED Fp(INCH/HR) = 0.21 AREA-AVERAGED Ap = 0.90 TOTAL AREA(ACRES) = 3.2 PEAK FLOW RATE(CFS) = 6.41
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 0.44 FLOW VELOCITY(FEET/SEC.) = 11.15
LONGEST FLOWPATH FROM NODE 390.00 TO NODE 392.00 = 1662.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 392.00 TO NODE 380.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 458.09 DOWNSTREAM(FEET) = 456.49 FLOW LENGTH(FEET) = 320.00 MANNING'S N = 0.013
DEPTH OF FLOW IN 18.0 INCH PIPE IS 13.5 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 4.52
ESTIMATED PIPE DIAMETER(INCH) = 18.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 6.41
PIPE TRAVEL TIME(MIN.) = 1.18 Tc(MIN.) = 13.41
LONGEST FLOWPATH FROM NODE 390.00 TO NODE 380.00 = 1982.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 380.00 TO NODE 380.00 IS CODE = 11 ---------------------------------------------------------------------------- >>>>>CONFLUENCE MEMORY BANK # 2 WITH THE MAIN-STREAM MEMORY<<<<< ============================================================================ ** MAIN STREAM CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 6.41 13.41 2.306 0.21( 0.19) 0.90 3.2 390.00
LONGEST FLOWPATH FROM NODE 390.00 TO NODE 380.00 = 1982.00 FEET. ** MEMORY BANK # 2 CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 62.18 9.96 2.735 0.25( 0.21) 0.84 26.5 370.00
2 65.08 12.61 2.389 0.25( 0.21) 0.83 32.3 360.00
3 64.78 12.89 2.359 0.25( 0.21) 0.83 32.6 381.00
LONGEST FLOWPATH FROM NODE 360.00 TO NODE 380.00 = 2186.00 FEET. ** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 67.90 9.96 2.735 0.24( 0.20) 0.84 28.9 370.00
2 71.35 12.61 2.389 0.24( 0.20) 0.84 35.3 360.00
3 71.09 12.89 2.359 0.24( 0.20) 0.84 35.7 381.00
4 69.59 13.41 2.306 0.24( 0.20) 0.84 35.8 390.00
TOTAL AREA(ACRES) = 35.8
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 71.35 Tc(MIN.) = 12.609
EFFECTIVE AREA(ACRES) = 35.30 AREA-AVERAGED Fm(INCH/HR) = 0.20 AREA-AVERAGED Fp(INCH/HR) = 0.24 AREA-AVERAGED Ap = 0.84 TOTAL AREA(ACRES) = 35.8
LONGEST FLOWPATH FROM NODE 360.00 TO NODE 380.00 = 2186.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 380.00 TO NODE 380.00 IS CODE = 12 ---------------------------------------------------------------------------- >>>>>CLEAR MEMORY BANK # 2 <<<<<
============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 380.00 TO NODE 331.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 456.49 DOWNSTREAM(FEET) = 435.08 FLOW LENGTH(FEET) = 774.00 MANNING'S N = 0.013
DEPTH OF FLOW IN 33.0 INCH PIPE IS 23.5 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 15.78
ESTIMATED PIPE DIAMETER(INCH) = 33.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 71.35
PIPE TRAVEL TIME(MIN.) = 0.82 Tc(MIN.) = 13.43
LONGEST FLOWPATH FROM NODE 360.00 TO NODE 331.00 = 2960.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 380.00 TO NODE 331.00 IS CODE = 81 ---------------------------------------------------------------------------- >>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================ MAINLINE Tc(MIN.) = 13.43
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.305
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
USER-DEFINED - 13.14 0.20 0.900 -
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.20
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.900
SUBAREA AREA(ACRES) = 13.14 SUBAREA RUNOFF(CFS) = 25.13 EFFECTIVE AREA(ACRES) = 48.44 AREA-AVERAGED Fm(INCH/HR) = 0.20 AREA-AVERAGED Fp(INCH/HR) = 0.23 AREA-AVERAGED Ap = 0.86 TOTAL AREA(ACRES) = 48.9 PEAK FLOW RATE(CFS) = 91.89
**************************************************************************** FLOW PROCESS FROM NODE 331.00 TO NODE 331.00 IS CODE = 11 ---------------------------------------------------------------------------- >>>>>CONFLUENCE MEMORY BANK # 1 WITH THE MAIN-STREAM MEMORY<<<<< ============================================================================ ** MAIN STREAM CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 91.41 10.78 2.614 0.23( 0.20) 0.86 42.0 370.00
2 91.89 13.43 2.305 0.23( 0.20) 0.86 48.4 360.00
3 91.39 13.71 2.278 0.23( 0.20) 0.86 48.8 381.00
4 89.49 14.23 2.229 0.23( 0.20) 0.86 48.9 390.00
LONGEST FLOWPATH FROM NODE 360.00 TO NODE 331.00 = 2960.00 FEET. ** MEMORY BANK # 1 CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 104.59 14.92 2.170 0.24( 0.22) 0.90 59.1 315.00
2 102.83 15.80 2.100 0.24( 0.22) 0.90 60.3 300.00
3 96.58 19.19 1.879 0.24( 0.22) 0.90 64.1 340.00
LONGEST FLOWPATH FROM NODE 300.00 TO NODE 331.00 = 4066.00 FEET. ** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 184.20 10.78 2.614 0.24( 0.21) 0.88 84.7 370.00
2 192.54 13.43 2.305 0.24( 0.21) 0.88 101.6 360.00
3 192.81 13.71 2.278 0.24( 0.21) 0.88 103.1 381.00
4 192.31 14.23 2.229 0.24( 0.21) 0.88 105.3 390.00
5 191.47 14.92 2.170 0.24( 0.21) 0.88 108.0 315.00
6 186.60 15.80 2.100 0.24( 0.21) 0.88 109.2 300.00
7 170.62 19.19 1.879 0.24( 0.21) 0.88 113.1 340.00
TOTAL AREA(ACRES) = 113.1
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 192.81 Tc(MIN.) = 13.708
EFFECTIVE AREA(ACRES) = 103.12 AREA-AVERAGED Fm(INCH/HR) = 0.21 AREA-AVERAGED Fp(INCH/HR) = 0.24 AREA-AVERAGED Ap = 0.88 TOTAL AREA(ACRES) = 113.1
LONGEST FLOWPATH FROM NODE 300.00 TO NODE 331.00 = 4066.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 331.00 TO NODE 331.00 IS CODE = 12 ---------------------------------------------------------------------------- >>>>>CLEAR MEMORY BANK # 1 <<<<<
============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 331.00 TO NODE 335.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 435.08 DOWNSTREAM(FEET) = 433.92 FLOW LENGTH(FEET) = 558.00 MANNING'S N = 0.013
DEPTH OF FLOW IN 75.0 INCH PIPE IS 58.0 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 7.57
ESTIMATED PIPE DIAMETER(INCH) = 75.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 192.81
PIPE TRAVEL TIME(MIN.) = 1.23 Tc(MIN.) = 14.94
LONGEST FLOWPATH FROM NODE 300.00 TO NODE 335.00 = 4624.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 335.00 TO NODE 470.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 433.92 DOWNSTREAM(FEET) = 433.02 FLOW LENGTH(FEET) = 181.00 MANNING'S N = 0.013
DEPTH OF FLOW IN 63.0 INCH PIPE IS 50.1 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 10.45
ESTIMATED PIPE DIAMETER(INCH) = 63.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 192.81
PIPE TRAVEL TIME(MIN.) = 0.29 Tc(MIN.) = 15.22
LONGEST FLOWPATH FROM NODE 300.00 TO NODE 470.00 = 4805.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 470.00 TO NODE 470.00 IS CODE = 10 ---------------------------------------------------------------------------- >>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 1 <<<<< ============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 400.00 TO NODE 401.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< ============================================================================ INITIAL SUBAREA FLOW-LENGTH(FEET) = 317.00
ELEVATION DATA: UPSTREAM(FEET) = 867.54 DOWNSTREAM(FEET) = 751.33 Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 8.638
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.968
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
URBAN GOOD COVER
"TURF" - 1.07 0.25 0.900 93 8.64
URBAN GOOD COVER
"TURF" - 0.39 0.20 0.900 93 8.64
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.24
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.900
SUBAREA RUNOFF(CFS) = 3.62
TOTAL AREA(ACRES) = 1.46 PEAK FLOW RATE(CFS) = 3.62
**************************************************************************** FLOW PROCESS FROM NODE 401.00 TO NODE 405.00 IS CODE = 51 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 751.33 DOWNSTREAM(FEET) = 659.95 CHANNEL LENGTH THRU SUBAREA(FEET) = 250.00 CHANNEL SLOPE = 0.3655 CHANNEL BASE(FEET) = 0.00 "Z" FACTOR = 2.000
MANNING'S FACTOR = 0.013 MAXIMUM DEPTH(FEET) = 10.00
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.932
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
USER-DEFINED - 2.37 0.25 0.900 -
USER-DEFINED - 0.83 0.20 0.900 -
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.24
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.900
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 7.54
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 22.51 AVERAGE FLOW DEPTH(FEET) = 0.41 TRAVEL TIME(MIN.) = 0.19 Tc(MIN.) = 8.82
SUBAREA AREA(ACRES) = 3.20 SUBAREA RUNOFF(CFS) = 7.83
EFFECTIVE AREA(ACRES) = 4.66 AREA-AVERAGED Fm(INCH/HR) = 0.21 AREA-AVERAGED Fp(INCH/HR) = 0.24 AREA-AVERAGED Ap = 0.90 TOTAL AREA(ACRES) = 4.7 PEAK FLOW RATE(CFS) = 11.40
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 0.48 FLOW VELOCITY(FEET/SEC.) = 24.98
LONGEST FLOWPATH FROM NODE 400.00 TO NODE 405.00 = 567.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 405.00 TO NODE 410.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 659.95 DOWNSTREAM(FEET) = 651.65 FLOW LENGTH(FEET) = 407.00 MANNING'S N = 0.013
DEPTH OF FLOW IN 18.0 INCH PIPE IS 12.2 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 8.95
ESTIMATED PIPE DIAMETER(INCH) = 18.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 11.40
PIPE TRAVEL TIME(MIN.) = 0.76 Tc(MIN.) = 9.58
LONGEST FLOWPATH FROM NODE 400.00 TO NODE 410.00 = 974.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 405.00 TO NODE 410.00 IS CODE = 81 ---------------------------------------------------------------------------- >>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================ MAINLINE Tc(MIN.) = 9.58
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.797
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
USER-DEFINED - 9.62 0.25 0.900 -
USER-DEFINED - 1.07 0.20 0.900 -
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.24
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.900
SUBAREA AREA(ACRES) = 10.69 SUBAREA RUNOFF(CFS) = 24.79 EFFECTIVE AREA(ACRES) = 15.35 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.24 AREA-AVERAGED Ap = 0.90 TOTAL AREA(ACRES) = 15.3 PEAK FLOW RATE(CFS) = 35.62
**************************************************************************** FLOW PROCESS FROM NODE 410.00 TO NODE 411.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 651.65 DOWNSTREAM(FEET) = 637.56 FLOW LENGTH(FEET) = 1467.00 MANNING'S N = 0.013
DEPTH OF FLOW IN 30.0 INCH PIPE IS 23.0 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 8.83
ESTIMATED PIPE DIAMETER(INCH) = 30.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 35.62
PIPE TRAVEL TIME(MIN.) = 2.77 Tc(MIN.) = 12.35
LONGEST FLOWPATH FROM NODE 400.00 TO NODE 411.00 = 2441.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 410.00 TO NODE 411.00 IS CODE = 81 ---------------------------------------------------------------------------- >>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================ MAINLINE Tc(MIN.) = 12.35
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.418
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
USER-DEFINED - 19.62 0.25 0.900 -
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.900
SUBAREA AREA(ACRES) = 19.62 SUBAREA RUNOFF(CFS) = 38.73 EFFECTIVE AREA(ACRES) = 34.97 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.25 AREA-AVERAGED Ap = 0.90 TOTAL AREA(ACRES) = 35.0 PEAK FLOW RATE(CFS) = 69.12
**************************************************************************** FLOW PROCESS FROM NODE 411.00 TO NODE 415.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 637.56 DOWNSTREAM(FEET) = 631.33 FLOW LENGTH(FEET) = 613.00 MANNING'S N = 0.013
DEPTH OF FLOW IN 39.0 INCH PIPE IS 28.3 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 10.73
ESTIMATED PIPE DIAMETER(INCH) = 39.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 69.12
PIPE TRAVEL TIME(MIN.) = 0.95 Tc(MIN.) = 13.30
LONGEST FLOWPATH FROM NODE 400.00 TO NODE 415.00 = 3054.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 411.00 TO NODE 415.00 IS CODE = 81 ---------------------------------------------------------------------------- >>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================ MAINLINE Tc(MIN.) = 13.30
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.317
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
USER-DEFINED - 8.67 0.25 0.900 -
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.900
SUBAREA AREA(ACRES) = 8.67 SUBAREA RUNOFF(CFS) = 16.33
EFFECTIVE AREA(ACRES) = 43.64 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.25 AREA-AVERAGED Ap = 0.90 TOTAL AREA(ACRES) = 43.6 PEAK FLOW RATE(CFS) = 82.27
**************************************************************************** FLOW PROCESS FROM NODE 415.00 TO NODE 420.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 631.33 DOWNSTREAM(FEET) = 613.71 FLOW LENGTH(FEET) = 1783.00 MANNING'S N = 0.013
DEPTH OF FLOW IN 42.0 INCH PIPE IS 30.2 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 11.10
ESTIMATED PIPE DIAMETER(INCH) = 42.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 82.27
PIPE TRAVEL TIME(MIN.) = 2.68 Tc(MIN.) = 15.98
LONGEST FLOWPATH FROM NODE 400.00 TO NODE 420.00 = 4837.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 415.00 TO NODE 420.00 IS CODE = 81 ---------------------------------------------------------------------------- >>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================ MAINLINE Tc(MIN.) = 15.98
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.086
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
USER-DEFINED - 0.38 0.40 0.900 -
USER-DEFINED - 26.21 0.25 0.900 -
USER-DEFINED - 11.39 0.20 0.900 -
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.24
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.900
SUBAREA AREA(ACRES) = 37.98 SUBAREA RUNOFF(CFS) = 64.04 EFFECTIVE AREA(ACRES) = 81.62 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.24 AREA-AVERAGED Ap = 0.90 TOTAL AREA(ACRES) = 81.6 PEAK FLOW RATE(CFS) = 137.24
**************************************************************************** FLOW PROCESS FROM NODE 420.00 TO NODE 420.00 IS CODE = 10 ---------------------------------------------------------------------------- >>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 3 <<<<< ============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 425.00 TO NODE 426.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< ============================================================================ INITIAL SUBAREA FLOW-LENGTH(FEET) = 290.00
ELEVATION DATA: UPSTREAM(FEET) = 865.54 DOWNSTREAM(FEET) = 751.02 Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 8.212
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 3.055
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
URBAN GOOD COVER
"TURF" - 0.61 0.25 0.900 93 8.21
URBAN GOOD COVER
"TURF" - 0.27 0.20 0.900 93 8.21
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.23
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.900
SUBAREA RUNOFF(CFS) = 2.25
TOTAL AREA(ACRES) = 0.88 PEAK FLOW RATE(CFS) = 2.25
**************************************************************************** FLOW PROCESS FROM NODE 426.00 TO NODE 430.00 IS CODE = 51 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 751.02 DOWNSTREAM(FEET) = 655.76 CHANNEL LENGTH THRU SUBAREA(FEET) = 251.00 CHANNEL SLOPE = 0.3795 CHANNEL BASE(FEET) = 0.00 "Z" FACTOR = 2.000
MANNING'S FACTOR = 0.013 MAXIMUM DEPTH(FEET) = 10.00
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 3.013
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
USER-DEFINED - 1.85 0.25 0.900 -
USER-DEFINED - 0.66 0.20 0.900 -
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.24
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.900
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 5.41
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 20.72 AVERAGE FLOW DEPTH(FEET) = 0.36 TRAVEL TIME(MIN.) = 0.20 Tc(MIN.) = 8.41
SUBAREA AREA(ACRES) = 2.51 SUBAREA RUNOFF(CFS) = 6.32
EFFECTIVE AREA(ACRES) = 3.39 AREA-AVERAGED Fm(INCH/HR) = 0.21 AREA-AVERAGED Fp(INCH/HR) = 0.24 AREA-AVERAGED Ap = 0.90 TOTAL AREA(ACRES) = 3.4 PEAK FLOW RATE(CFS) = 8.54
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 0.43 FLOW VELOCITY(FEET/SEC.) = 23.09
LONGEST FLOWPATH FROM NODE 425.00 TO NODE 430.00 = 541.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 430.00 TO NODE 435.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 655.76 DOWNSTREAM(FEET) = 625.08 FLOW LENGTH(FEET) = 1326.00 MANNING'S N = 0.013
DEPTH OF FLOW IN 15.0 INCH PIPE IS 11.3 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 8.62
ESTIMATED PIPE DIAMETER(INCH) = 15.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 8.54
PIPE TRAVEL TIME(MIN.) = 2.57 Tc(MIN.) = 10.98
LONGEST FLOWPATH FROM NODE 425.00 TO NODE 435.00 = 1867.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 430.00 TO NODE 435.00 IS CODE = 81 ---------------------------------------------------------------------------- >>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================ MAINLINE Tc(MIN.) = 10.98
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.587
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
USER-DEFINED - 14.67 0.25 0.900 -
USER-DEFINED - 6.92 0.20 0.900 -
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.23
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.900
SUBAREA AREA(ACRES) = 21.59 SUBAREA RUNOFF(CFS) = 46.17 EFFECTIVE AREA(ACRES) = 24.98 AREA-AVERAGED Fm(INCH/HR) = 0.21 AREA-AVERAGED Fp(INCH/HR) = 0.23 AREA-AVERAGED Ap = 0.90 TOTAL AREA(ACRES) = 25.0 PEAK FLOW RATE(CFS) = 53.42
**************************************************************************** FLOW PROCESS FROM NODE 435.00 TO NODE 420.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 625.08 DOWNSTREAM(FEET) = 613.71 FLOW LENGTH(FEET) = 604.00 MANNING'S N = 0.013
DEPTH OF FLOW IN 33.0 INCH PIPE IS 21.8 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 12.80
ESTIMATED PIPE DIAMETER(INCH) = 33.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 53.42
PIPE TRAVEL TIME(MIN.) = 0.79 Tc(MIN.) = 11.77
LONGEST FLOWPATH FROM NODE 425.00 TO NODE 420.00 = 2471.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 435.00 TO NODE 420.00 IS CODE = 81 ---------------------------------------------------------------------------- >>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================ MAINLINE Tc(MIN.) = 11.77
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.486
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
USER-DEFINED - 0.25 0.40 0.100 -
USER-DEFINED - 0.23 0.25 0.100 -
USER-DEFINED - 1.32 0.20 0.100 -
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.23
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA AREA(ACRES) = 1.80 SUBAREA RUNOFF(CFS) = 3.99
EFFECTIVE AREA(ACRES) = 26.78 AREA-AVERAGED Fm(INCH/HR) = 0.20 AREA-AVERAGED Fp(INCH/HR) = 0.23 AREA-AVERAGED Ap = 0.85 TOTAL AREA(ACRES) = 26.8 PEAK FLOW RATE(CFS) = 55.15
**************************************************************************** FLOW PROCESS FROM NODE 420.00 TO NODE 420.00 IS CODE = 11 ---------------------------------------------------------------------------- >>>>>CONFLUENCE MEMORY BANK # 3 WITH THE MAIN-STREAM MEMORY<<<<< ============================================================================ ** MAIN STREAM CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 55.15 11.77 2.486 0.23( 0.20) 0.85 26.8 425.00
LONGEST FLOWPATH FROM NODE 425.00 TO NODE 420.00 = 2471.00 FEET. ** MEMORY BANK # 3 CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 137.24 15.98 2.086 0.24( 0.22) 0.90 81.6 400.00
LONGEST FLOWPATH FROM NODE 400.00 TO NODE 420.00 = 4837.00 FEET. ** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 177.83 11.77 2.486 0.24( 0.21) 0.88 86.9 425.00
2 182.74 15.98 2.086 0.24( 0.21) 0.89 108.4 400.00
TOTAL AREA(ACRES) = 108.4
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 182.74 Tc(MIN.) = 15.979
EFFECTIVE AREA(ACRES) = 108.40 AREA-AVERAGED Fm(INCH/HR) = 0.21 AREA-AVERAGED Fp(INCH/HR) = 0.24 AREA-AVERAGED Ap = 0.89 TOTAL AREA(ACRES) = 108.4
LONGEST FLOWPATH FROM NODE 400.00 TO NODE 420.00 = 4837.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 420.00 TO NODE 420.00 IS CODE = 12 ---------------------------------------------------------------------------- >>>>>CLEAR MEMORY BANK # 3 <<<<<
============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 420.00 TO NODE 455.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 613.71 DOWNSTREAM(FEET) = 607.29 FLOW LENGTH(FEET) = 511.00 MANNING'S N = 0.013
DEPTH OF FLOW IN 54.0 INCH PIPE IS 39.1 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 14.82
ESTIMATED PIPE DIAMETER(INCH) = 54.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 182.74
PIPE TRAVEL TIME(MIN.) = 0.57 Tc(MIN.) = 16.55
LONGEST FLOWPATH FROM NODE 400.00 TO NODE 455.00 = 5348.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 420.00 TO NODE 455.00 IS CODE = 81 ---------------------------------------------------------------------------- >>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================ MAINLINE Tc(MIN.) = 16.55
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.044
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
USER-DEFINED - 1.30 0.40 0.100 -
USER-DEFINED - 0.03 0.20 0.100 -
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA AREA(ACRES) = 1.33 SUBAREA RUNOFF(CFS) = 2.40
EFFECTIVE AREA(ACRES) = 109.73 AREA-AVERAGED Fm(INCH/HR) = 0.21 AREA-AVERAGED Fp(INCH/HR) = 0.24 AREA-AVERAGED Ap = 0.88 TOTAL AREA(ACRES) = 109.7 PEAK FLOW RATE(CFS) = 182.74
NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE
**************************************************************************** FLOW PROCESS FROM NODE 455.00 TO NODE 455.00 IS CODE = 10 ---------------------------------------------------------------------------- >>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 2 <<<<< ============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 10.00 TO NODE 11.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< ============================================================================ INITIAL SUBAREA FLOW-LENGTH(FEET) = 319.00
ELEVATION DATA: UPSTREAM(FEET) = 940.00 DOWNSTREAM(FEET) = 830.00 Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 6.519
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 3.487
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
NATURAL POOR COVER
"BARREN" D 0.19 0.20 1.000 93 6.52
NATURAL POOR COVER
"BARREN" C 1.12 0.25 1.000 91 6.52
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.24
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
SUBAREA RUNOFF(CFS) = 3.83
TOTAL AREA(ACRES) = 1.31 PEAK FLOW RATE(CFS) = 3.83
**************************************************************************** FLOW PROCESS FROM NODE 11.00 TO NODE 12.00 IS CODE = 51 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 830.00 DOWNSTREAM(FEET) = 671.81 CHANNEL LENGTH THRU SUBAREA(FEET) = 453.00 CHANNEL SLOPE = 0.3492 CHANNEL BASE(FEET) = 0.00 "Z" FACTOR = 2.500
MANNING'S FACTOR = 0.030 MAXIMUM DEPTH(FEET) = 10.00
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 3.296
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" C 0.06 0.25 1.000 91
NATURAL POOR COVER
"BARREN" D 2.49 0.20 1.000 93
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.20
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 7.38
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 11.17 AVERAGE FLOW DEPTH(FEET) = 0.51 TRAVEL TIME(MIN.) = 0.68 Tc(MIN.) = 7.19
SUBAREA AREA(ACRES) = 2.55 SUBAREA RUNOFF(CFS) = 7.10
EFFECTIVE AREA(ACRES) = 3.86 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.22 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 3.9 PEAK FLOW RATE(CFS) = 10.70
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 0.59 FLOW VELOCITY(FEET/SEC.) = 12.28
LONGEST FLOWPATH FROM NODE 10.00 TO NODE 12.00 = 772.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 12.00 TO NODE 20.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 671.81 DOWNSTREAM(FEET) = 647.83 FLOW LENGTH(FEET) = 118.00 MANNING'S N = 0.013
DEPTH OF FLOW IN 12.0 INCH PIPE IS 7.4 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 21.00
ESTIMATED PIPE DIAMETER(INCH) = 12.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 10.70
PIPE TRAVEL TIME(MIN.) = 0.09 Tc(MIN.) = 7.29
LONGEST FLOWPATH FROM NODE 10.00 TO NODE 20.00 = 890.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 20.00 TO NODE 20.00 IS CODE = 10 ---------------------------------------------------------------------------- >>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 3 <<<<< ============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 13.00 TO NODE 14.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< ============================================================================ INITIAL SUBAREA FLOW-LENGTH(FEET) = 178.00
ELEVATION DATA: UPSTREAM(FEET) = 1058.19 DOWNSTREAM(FEET) = 984.25 Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 5.000
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 4.060
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
NATURAL POOR COVER
"BARREN" C 2.11 0.25 1.000 91 5.00
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
SUBAREA RUNOFF(CFS) = 7.23
TOTAL AREA(ACRES) = 2.11 PEAK FLOW RATE(CFS) = 7.23
**************************************************************************** FLOW PROCESS FROM NODE 14.00 TO NODE 15.00 IS CODE = 51 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 984.25 DOWNSTREAM(FEET) = 669.90 CHANNEL LENGTH THRU SUBAREA(FEET) = 1335.00 CHANNEL SLOPE = 0.2355 CHANNEL BASE(FEET) = 0.00 "Z" FACTOR = 2.500
MANNING'S FACTOR = 0.030 MAXIMUM DEPTH(FEET) = 10.00
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 3.468
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" C 11.50 0.25 1.000 91
NATURAL POOR COVER
"BARREN" D 6.24 0.20 1.000 93
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.23
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 33.19
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 14.06 AVERAGE FLOW DEPTH(FEET) = 0.97 TRAVEL TIME(MIN.) = 1.58 Tc(MIN.) = 6.58
SUBAREA AREA(ACRES) = 17.74 SUBAREA RUNOFF(CFS) = 51.65 EFFECTIVE AREA(ACRES) = 19.85 AREA-AVERAGED Fm(INCH/HR) = 0.23 AREA-AVERAGED Fp(INCH/HR) = 0.23 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 19.9 PEAK FLOW RATE(CFS) = 57.76
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 1.19 FLOW VELOCITY(FEET/SEC.) = 16.23
LONGEST FLOWPATH FROM NODE 13.00 TO NODE 15.00 = 1513.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 15.00 TO NODE 20.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 669.90 DOWNSTREAM(FEET) = 647.83 FLOW LENGTH(FEET) = 119.00 MANNING'S N = 0.013
DEPTH OF FLOW IN 21.0 INCH PIPE IS 15.5 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 30.43
ESTIMATED PIPE DIAMETER(INCH) = 21.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 57.76
PIPE TRAVEL TIME(MIN.) = 0.07 Tc(MIN.) = 6.65
LONGEST FLOWPATH FROM NODE 13.00 TO NODE 20.00 = 1632.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 20.00 TO NODE 20.00 IS CODE = 11 ---------------------------------------------------------------------------- >>>>>CONFLUENCE MEMORY BANK # 3 WITH THE MAIN-STREAM MEMORY<<<<< ============================================================================ ** MAIN STREAM CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 57.76 6.65 3.448 0.23( 0.23) 1.00 19.9 13.00
LONGEST FLOWPATH FROM NODE 13.00 TO NODE 20.00 = 1632.00 FEET. ** MEMORY BANK # 3 CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 10.70 7.29 3.271 0.22( 0.22) 1.00 3.9 10.00
LONGEST FLOWPATH FROM NODE 10.00 TO NODE 20.00 = 890.00 FEET. ** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 68.09 6.65 3.448 0.23( 0.23) 1.00 23.4 13.00
2 65.28 7.29 3.271 0.23( 0.23) 1.00 23.7 10.00
TOTAL AREA(ACRES) = 23.7
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 68.09 Tc(MIN.) = 6.648
EFFECTIVE AREA(ACRES) = 23.37 AREA-AVERAGED Fm(INCH/HR) = 0.23 AREA-AVERAGED Fp(INCH/HR) = 0.23 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 23.7
LONGEST FLOWPATH FROM NODE 13.00 TO NODE 20.00 = 1632.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 20.00 TO NODE 20.00 IS CODE = 12 ---------------------------------------------------------------------------- >>>>>CLEAR MEMORY BANK # 3 <<<<<
============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 20.00 TO NODE 30.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 647.83 DOWNSTREAM(FEET) = 624.60 FLOW LENGTH(FEET) = 767.00 MANNING'S N = 0.013
DEPTH OF FLOW IN 33.0 INCH PIPE IS 21.9 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 16.25
ESTIMATED PIPE DIAMETER(INCH) = 33.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 68.09
PIPE TRAVEL TIME(MIN.) = 0.79 Tc(MIN.) = 7.43
LONGEST FLOWPATH FROM NODE 13.00 TO NODE 30.00 = 2399.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 20.00 TO NODE 30.00 IS CODE = 81 ---------------------------------------------------------------------------- >>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================ MAINLINE Tc(MIN.) = 7.43
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 3.234
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
USER-DEFINED - 0.91 0.25 0.900 -
USER-DEFINED - 0.91 0.20 0.900 -
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.22
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.900
SUBAREA AREA(ACRES) = 1.82 SUBAREA RUNOFF(CFS) = 4.97
EFFECTIVE AREA(ACRES) = 25.19 AREA-AVERAGED Fm(INCH/HR) = 0.23 AREA-AVERAGED Fp(INCH/HR) = 0.23 AREA-AVERAGED Ap = 0.99 TOTAL AREA(ACRES) = 25.5 PEAK FLOW RATE(CFS) = 68.12
**************************************************************************** FLOW PROCESS FROM NODE 30.00 TO NODE 30.00 IS CODE = 10 ---------------------------------------------------------------------------- >>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 3 <<<<< ============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 21.00 TO NODE 22.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< ============================================================================ INITIAL SUBAREA FLOW-LENGTH(FEET) = 239.00
ELEVATION DATA: UPSTREAM(FEET) = 1140.97 DOWNSTREAM(FEET) = 1082.68 Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 6.224
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 3.581
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
NATURAL POOR COVER
"BARREN" D 1.26 0.20 1.000 93 6.22
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.20
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
SUBAREA RUNOFF(CFS) = 3.83
TOTAL AREA(ACRES) = 1.26 PEAK FLOW RATE(CFS) = 3.83
**************************************************************************** FLOW PROCESS FROM NODE 22.00 TO NODE 25.00 IS CODE = 51 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 1082.68 DOWNSTREAM(FEET) = 706.33 CHANNEL LENGTH THRU SUBAREA(FEET) = 1409.00 CHANNEL SLOPE = 0.2671 CHANNEL BASE(FEET) = 0.00 "Z" FACTOR = 2.500
MANNING'S FACTOR = 0.030 MAXIMUM DEPTH(FEET) = 10.00
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 3.119
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" C 1.62 0.25 1.000 91
NATURAL POOR COVER
"BARREN" D 14.57 0.20 1.000 93
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.21
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 25.13
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 13.86 AVERAGE FLOW DEPTH(FEET) = 0.85 TRAVEL TIME(MIN.) = 1.69 Tc(MIN.) = 7.92
SUBAREA AREA(ACRES) = 16.19 SUBAREA RUNOFF(CFS) = 42.47 EFFECTIVE AREA(ACRES) = 17.45 AREA-AVERAGED Fm(INCH/HR) = 0.20 AREA-AVERAGED Fp(INCH/HR) = 0.20 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 17.5 PEAK FLOW RATE(CFS) = 45.78
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 1.07 FLOW VELOCITY(FEET/SEC.) = 15.96
LONGEST FLOWPATH FROM NODE 21.00 TO NODE 25.00 = 1648.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 25.00 TO NODE 25.00 IS CODE = 1
---------------------------------------------------------------------------- >>>>>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE<<<<<
============================================================================ TOTAL NUMBER OF STREAMS = 2
CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 1 ARE:
TIME OF CONCENTRATION(MIN.) = 7.92
RAINFALL INTENSITY(INCH/HR) = 3.12
AREA-AVERAGED Fm(INCH/HR) = 0.20
AREA-AVERAGED Fp(INCH/HR) = 0.20
AREA-AVERAGED Ap = 1.00
EFFECTIVE STREAM AREA(ACRES) = 17.45
TOTAL STREAM AREA(ACRES) = 17.45
PEAK FLOW RATE(CFS) AT CONFLUENCE = 45.78
**************************************************************************** FLOW PROCESS FROM NODE 23.00 TO NODE 24.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< ============================================================================ INITIAL SUBAREA FLOW-LENGTH(FEET) = 273.00
ELEVATION DATA: UPSTREAM(FEET) = 1101.23 DOWNSTREAM(FEET) = 1025.31 Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 6.394
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 3.526
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
NATURAL POOR COVER
"BARREN" C 2.34 0.25 1.000 91 6.39
NATURAL POOR COVER
"BARREN" D 3.50 0.20 1.000 93 6.39
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.22
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
SUBAREA RUNOFF(CFS) = 17.38
TOTAL AREA(ACRES) = 5.84 PEAK FLOW RATE(CFS) = 17.38
**************************************************************************** FLOW PROCESS FROM NODE 24.00 TO NODE 25.00 IS CODE = 51 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 1025.31 DOWNSTREAM(FEET) = 706.33 CHANNEL LENGTH THRU SUBAREA(FEET) = 1345.00 CHANNEL SLOPE = 0.2372 CHANNEL BASE(FEET) = 0.00 "Z" FACTOR = 2.500
MANNING'S FACTOR = 0.030 MAXIMUM DEPTH(FEET) = 10.00
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 3.122
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" C 8.55 0.25 1.000 91
NATURAL POOR COVER
"BARREN" D 8.56 0.20 1.000 93
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.22
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 39.73
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 14.84 AVERAGE FLOW DEPTH(FEET) = 1.03 TRAVEL TIME(MIN.) = 1.51 Tc(MIN.) = 7.90
SUBAREA AREA(ACRES) = 17.11 SUBAREA RUNOFF(CFS) = 44.62 EFFECTIVE AREA(ACRES) = 22.95 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.22 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 23.0 PEAK FLOW RATE(CFS) = 59.87
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 1.21 FLOW VELOCITY(FEET/SEC.) = 16.40
LONGEST FLOWPATH FROM NODE 23.00 TO NODE 25.00 = 1618.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 25.00 TO NODE 25.00 IS CODE = 1
---------------------------------------------------------------------------- >>>>>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE<<<<<
>>>>>AND COMPUTE VARIOUS CONFLUENCED STREAM VALUES<<<<< ============================================================================ TOTAL NUMBER OF STREAMS = 2
CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 2 ARE:
TIME OF CONCENTRATION(MIN.) = 7.90
RAINFALL INTENSITY(INCH/HR) = 3.12
AREA-AVERAGED Fm(INCH/HR) = 0.22
AREA-AVERAGED Fp(INCH/HR) = 0.22
AREA-AVERAGED Ap = 1.00
EFFECTIVE STREAM AREA(ACRES) = 22.95
TOTAL STREAM AREA(ACRES) = 22.95
PEAK FLOW RATE(CFS) AT CONFLUENCE = 59.87
** CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 45.78 7.92 3.119 0.20( 0.20) 1.00 17.5 21.00
2 59.87 7.90 3.122 0.22( 0.22) 1.00 23.0 23.00
RAINFALL INTENSITY AND TIME OF CONCENTRATION RATIO
CONFLUENCE FORMULA USED FOR 2 STREAMS.
** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 105.62 7.90 3.122 0.22( 0.22) 1.00 40.4 23.00
2 105.59 7.92 3.119 0.22( 0.22) 1.00 40.4 21.00
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 105.62 Tc(MIN.) = 7.90
EFFECTIVE AREA(ACRES) = 40.37 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.22 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 40.4
LONGEST FLOWPATH FROM NODE 21.00 TO NODE 25.00 = 1648.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 25.00 TO NODE 28.00 IS CODE = 51 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 706.33 DOWNSTREAM(FEET) = 638.00 CHANNEL LENGTH THRU SUBAREA(FEET) = 1254.00 CHANNEL SLOPE = 0.0545 CHANNEL BASE(FEET) = 0.00 "Z" FACTOR = 2.500
MANNING'S FACTOR = 0.030 MAXIMUM DEPTH(FEET) = 10.00
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.769
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" C 8.68 0.25 1.000 91
NATURAL POOR COVER
"BARREN" D 7.10 0.20 1.000 93
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.23
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 123.67 TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 11.35 AVERAGE FLOW DEPTH(FEET) = 2.09 TRAVEL TIME(MIN.) = 1.84 Tc(MIN.) = 9.75
SUBAREA AREA(ACRES) = 15.78 SUBAREA RUNOFF(CFS) = 36.10 EFFECTIVE AREA(ACRES) = 56.15 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.22 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 56.2 PEAK FLOW RATE(CFS) = 128.89
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 2.12 FLOW VELOCITY(FEET/SEC.) = 11.43
LONGEST FLOWPATH FROM NODE 21.00 TO NODE 28.00 = 2902.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 28.00 TO NODE 28.00 IS CODE = 1
---------------------------------------------------------------------------- >>>>>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE<<<<<
============================================================================ TOTAL NUMBER OF STREAMS = 2
CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 1 ARE:
TIME OF CONCENTRATION(MIN.) = 9.75
RAINFALL INTENSITY(INCH/HR) = 2.77
AREA-AVERAGED Fm(INCH/HR) = 0.22
AREA-AVERAGED Fp(INCH/HR) = 0.22
AREA-AVERAGED Ap = 1.00
EFFECTIVE STREAM AREA(ACRES) = 56.15
TOTAL STREAM AREA(ACRES) = 56.18
PEAK FLOW RATE(CFS) AT CONFLUENCE = 128.89
**************************************************************************** FLOW PROCESS FROM NODE 26.00 TO NODE 27.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< ============================================================================ INITIAL SUBAREA FLOW-LENGTH(FEET) = 180.00
ELEVATION DATA: UPSTREAM(FEET) = 730.00 DOWNSTREAM(FEET) = 692.00 Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 5.720
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 3.758
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
NATURAL POOR COVER
"BARREN" C 0.56 0.25 1.000 91 5.72
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
SUBAREA RUNOFF(CFS) = 1.77
TOTAL AREA(ACRES) = 0.56 PEAK FLOW RATE(CFS) = 1.77
**************************************************************************** FLOW PROCESS FROM NODE 27.00 TO NODE 28.00 IS CODE = 51 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 692.00 DOWNSTREAM(FEET) = 638.00 CHANNEL LENGTH THRU SUBAREA(FEET) = 352.00 CHANNEL SLOPE = 0.1534 CHANNEL BASE(FEET) = 0.00 "Z" FACTOR = 2.500
MANNING'S FACTOR = 0.030 MAXIMUM DEPTH(FEET) = 10.00
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 3.473
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" C 1.34 0.25 1.000 91
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 3.71
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 6.94 AVERAGE FLOW DEPTH(FEET) = 0.46 TRAVEL TIME(MIN.) = 0.84 Tc(MIN.) = 6.56
SUBAREA AREA(ACRES) = 1.34 SUBAREA RUNOFF(CFS) = 3.89
EFFECTIVE AREA(ACRES) = 1.90 AREA-AVERAGED Fm(INCH/HR) = 0.25 AREA-AVERAGED Fp(INCH/HR) = 0.25 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 1.9 PEAK FLOW RATE(CFS) = 5.51
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 0.54 FLOW VELOCITY(FEET/SEC.) = 7.65
LONGEST FLOWPATH FROM NODE 26.00 TO NODE 28.00 = 532.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 28.00 TO NODE 28.00 IS CODE = 1
---------------------------------------------------------------------------- >>>>>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE<<<<<
>>>>>AND COMPUTE VARIOUS CONFLUENCED STREAM VALUES<<<<< ============================================================================ TOTAL NUMBER OF STREAMS = 2
CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 2 ARE:
TIME OF CONCENTRATION(MIN.) = 6.56
RAINFALL INTENSITY(INCH/HR) = 3.47
AREA-AVERAGED Fm(INCH/HR) = 0.25
AREA-AVERAGED Fp(INCH/HR) = 0.25
AREA-AVERAGED Ap = 1.00
EFFECTIVE STREAM AREA(ACRES) = 1.90
TOTAL STREAM AREA(ACRES) = 1.90
PEAK FLOW RATE(CFS) AT CONFLUENCE = 5.51
** CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 128.89 9.75 2.769 0.22( 0.22) 1.00 56.1 23.00
1 128.84 9.76 2.767 0.22( 0.22) 1.00 56.2 21.00
2 5.51 6.56 3.473 0.25( 0.25) 1.00 1.9 26.00
RAINFALL INTENSITY AND TIME OF CONCENTRATION RATIO
CONFLUENCE FORMULA USED FOR 2 STREAMS.
** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 116.28 6.56 3.473 0.22( 0.22) 1.00 39.7 26.00
2 133.20 9.75 2.769 0.22( 0.22) 1.00 58.0 23.00
3 133.15 9.76 2.767 0.22( 0.22) 1.00 58.1 21.00
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 133.20 Tc(MIN.) = 9.75
EFFECTIVE AREA(ACRES) = 58.05 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.22 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 58.1
LONGEST FLOWPATH FROM NODE 21.00 TO NODE 28.00 = 2902.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 28.00 TO NODE 30.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 638.00 DOWNSTREAM(FEET) = 624.60 FLOW LENGTH(FEET) = 140.00 MANNING'S N = 0.013
DEPTH OF FLOW IN 33.0 INCH PIPE IS 23.5 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 29.38
ESTIMATED PIPE DIAMETER(INCH) = 33.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 133.20
PIPE TRAVEL TIME(MIN.) = 0.08 Tc(MIN.) = 9.83
LONGEST FLOWPATH FROM NODE 21.00 TO NODE 30.00 = 3042.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 30.00 TO NODE 30.00 IS CODE = 11 ---------------------------------------------------------------------------- >>>>>CONFLUENCE MEMORY BANK # 3 WITH THE MAIN-STREAM MEMORY<<<<< ============================================================================ ** MAIN STREAM CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 116.28 6.65 3.448 0.22( 0.22) 1.00 39.7 26.00
2 133.20 9.83 2.757 0.22( 0.22) 1.00 58.0 23.00
3 133.15 9.84 2.754 0.22( 0.22) 1.00 58.1 21.00
LONGEST FLOWPATH FROM NODE 21.00 TO NODE 30.00 = 3042.00 FEET. ** MEMORY BANK # 3 CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 68.12 7.43 3.234 0.23( 0.23) 0.99 25.2 13.00
2 65.47 8.10 3.079 0.23( 0.23) 0.99 25.5 10.00
LONGEST FLOWPATH FROM NODE 13.00 TO NODE 30.00 = 2399.00 FEET. ** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 181.54 6.65 3.448 0.22( 0.22) 1.00 62.2 26.00
2 188.60 7.43 3.234 0.22( 0.22) 1.00 69.4 13.00
3 189.50 8.10 3.079 0.22( 0.22) 1.00 73.6 10.00
4 191.27 9.83 2.757 0.22( 0.22) 1.00 83.6 23.00
5 191.17 9.84 2.754 0.22( 0.22) 1.00 83.6 21.00
TOTAL AREA(ACRES) = 83.6
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 191.27 Tc(MIN.) = 9.825
EFFECTIVE AREA(ACRES) = 83.58 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.22 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 83.6
LONGEST FLOWPATH FROM NODE 21.00 TO NODE 30.00 = 3042.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 30.00 TO NODE 30.00 IS CODE = 12 ---------------------------------------------------------------------------- >>>>>CLEAR MEMORY BANK # 3 <<<<<
============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 30.00 TO NODE 40.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 624.60 DOWNSTREAM(FEET) = 617.67 FLOW LENGTH(FEET) = 200.00 MANNING'S N = 0.013
DEPTH OF FLOW IN 45.0 INCH PIPE IS 33.2 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 21.87
ESTIMATED PIPE DIAMETER(INCH) = 45.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 191.27
PIPE TRAVEL TIME(MIN.) = 0.15 Tc(MIN.) = 9.98
LONGEST FLOWPATH FROM NODE 21.00 TO NODE 40.00 = 3242.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 40.00 TO NODE 40.00 IS CODE = 10 ---------------------------------------------------------------------------- >>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 3 <<<<< ============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 32.00 TO NODE 34.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< ============================================================================ INITIAL SUBAREA FLOW-LENGTH(FEET) = 159.00
ELEVATION DATA: UPSTREAM(FEET) = 682.00 DOWNSTREAM(FEET) = 632.00 Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 5.026
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 4.048
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
NATURAL POOR COVER
"BARREN" C 0.18 0.25 1.000 91 5.03
NATURAL POOR COVER
"BARREN" D 0.19 0.20 1.000 93 5.03
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.22
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
SUBAREA RUNOFF(CFS) = 1.27
TOTAL AREA(ACRES) = 0.37 PEAK FLOW RATE(CFS) = 1.27
**************************************************************************** FLOW PROCESS FROM NODE 34.00 TO NODE 40.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 632.00 DOWNSTREAM(FEET) = 617.67 FLOW LENGTH(FEET) = 123.00 MANNING'S N = 0.013
ESTIMATED PIPE DIAMETER(INCH) INCREASED TO 12.000
DEPTH OF FLOW IN 12.0 INCH PIPE IS 2.7 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 9.68
ESTIMATED PIPE DIAMETER(INCH) = 12.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 1.27
PIPE TRAVEL TIME(MIN.) = 0.21 Tc(MIN.) = 5.24
LONGEST FLOWPATH FROM NODE 32.00 TO NODE 40.00 = 282.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 40.00 TO NODE 40.00 IS CODE = 11 ---------------------------------------------------------------------------- >>>>>CONFLUENCE MEMORY BANK # 3 WITH THE MAIN-STREAM MEMORY<<<<< ============================================================================ ** MAIN STREAM CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 1.27 5.24 3.953 0.22( 0.22) 1.00 0.4 32.00
LONGEST FLOWPATH FROM NODE 32.00 TO NODE 40.00 = 282.00 FEET. ** MEMORY BANK # 3 CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 181.54 6.80 3.403 0.22( 0.22) 1.00 62.2 26.00
2 188.60 7.59 3.197 0.22( 0.22) 1.00 69.4 13.00
3 189.50 8.25 3.046 0.22( 0.22) 1.00 73.6 10.00
4 191.27 9.98 2.732 0.22( 0.22) 1.00 83.6 23.00
5 191.17 9.99 2.730 0.22( 0.22) 1.00 83.6 21.00
LONGEST FLOWPATH FROM NODE 21.00 TO NODE 40.00 = 3242.00 FEET. ** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 165.24 5.24 3.953 0.22( 0.22) 1.00 48.3 32.00
2 182.63 6.80 3.403 0.22( 0.22) 1.00 62.6 26.00
3 189.61 7.59 3.197 0.22( 0.22) 1.00 69.8 13.00
4 190.46 8.25 3.046 0.22( 0.22) 1.00 74.0 10.00
5 192.13 9.98 2.732 0.22( 0.22) 1.00 83.9 23.00
6 192.02 9.99 2.730 0.22( 0.22) 1.00 84.0 21.00
TOTAL AREA(ACRES) = 84.0
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 192.13 Tc(MIN.) = 9.978
EFFECTIVE AREA(ACRES) = 83.95 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.22 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 84.0
LONGEST FLOWPATH FROM NODE 21.00 TO NODE 40.00 = 3242.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 40.00 TO NODE 40.00 IS CODE = 12 ---------------------------------------------------------------------------- >>>>>CLEAR MEMORY BANK # 3 <<<<<
============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 40.00 TO NODE 455.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 617.67 DOWNSTREAM(FEET) = 607.29 FLOW LENGTH(FEET) = 914.00 MANNING'S N = 0.013
DEPTH OF FLOW IN 54.0 INCH PIPE IS 42.7 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 14.24
ESTIMATED PIPE DIAMETER(INCH) = 54.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 192.13
PIPE TRAVEL TIME(MIN.) = 1.07 Tc(MIN.) = 11.05
LONGEST FLOWPATH FROM NODE 21.00 TO NODE 455.00 = 4156.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 455.00 TO NODE 455.00 IS CODE = 11 ---------------------------------------------------------------------------- >>>>>CONFLUENCE MEMORY BANK # 2 WITH THE MAIN-STREAM MEMORY<<<<< ============================================================================ ** MAIN STREAM CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 165.24 6.35 3.540 0.22( 0.22) 1.00 48.3 32.00
2 182.63 7.88 3.129 0.22( 0.22) 1.00 62.6 26.00
3 189.61 8.66 2.964 0.22( 0.22) 1.00 69.8 13.00
4 190.46 9.32 2.840 0.22( 0.22) 1.00 74.0 10.00
5 192.13 11.05 2.577 0.22( 0.22) 1.00 83.9 23.00
6 192.02 11.06 2.576 0.22( 0.22) 1.00 84.0 21.00
LONGEST FLOWPATH FROM NODE 21.00 TO NODE 455.00 = 4156.00 FEET. ** MEMORY BANK # 2 CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 177.83 12.36 2.417 0.24( 0.21) 0.87 88.2 425.00
2 182.74 16.55 2.044 0.24( 0.21) 0.88 109.7 400.00
LONGEST FLOWPATH FROM NODE 400.00 TO NODE 455.00 = 5348.00 FEET. ** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 303.08 6.35 3.540 0.23( 0.22) 0.94 93.6 32.00
2 332.51 7.88 3.129 0.23( 0.22) 0.94 118.8 26.00
3 345.05 8.66 2.964 0.23( 0.22) 0.94 131.6 13.00
4 350.38 9.32 2.840 0.23( 0.22) 0.94 140.6 10.00
5 362.66 11.05 2.577 0.23( 0.22) 0.94 162.8 23.00
6 362.63 11.06 2.576 0.23( 0.22) 0.94 163.0 21.00
7 356.94 12.36 2.417 0.23( 0.22) 0.93 172.2 425.00
8 331.41 16.55 2.044 0.23( 0.22) 0.93 193.7 400.00
TOTAL AREA(ACRES) = 193.7
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 362.66 Tc(MIN.) = 11.047
EFFECTIVE AREA(ACRES) = 162.82 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.23 AREA-AVERAGED Ap = 0.94 TOTAL AREA(ACRES) = 193.7
LONGEST FLOWPATH FROM NODE 400.00 TO NODE 455.00 = 5348.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 455.00 TO NODE 455.00 IS CODE = 12 ---------------------------------------------------------------------------- >>>>>CLEAR MEMORY BANK # 2 <<<<<
============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 455.00 TO NODE 455.00 IS CODE = 10 ---------------------------------------------------------------------------- >>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 2 <<<<< ============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 41.00 TO NODE 42.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< ============================================================================ INITIAL SUBAREA FLOW-LENGTH(FEET) = 329.00
ELEVATION DATA: UPSTREAM(FEET) = 860.00 DOWNSTREAM(FEET) = 715.00 Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 6.284
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 3.561
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
NATURAL POOR COVER
"BARREN" C 2.22 0.25 1.000 91 6.28
NATURAL POOR COVER
"BARREN" D 1.21 0.20 1.000 93 6.28
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.23
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
SUBAREA RUNOFF(CFS) = 10.28
TOTAL AREA(ACRES) = 3.43 PEAK FLOW RATE(CFS) = 10.28
**************************************************************************** FLOW PROCESS FROM NODE 42.00 TO NODE 43.00 IS CODE = 51 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 715.00 DOWNSTREAM(FEET) = 640.00 CHANNEL LENGTH THRU SUBAREA(FEET) = 581.00 CHANNEL SLOPE = 0.1291 CHANNEL BASE(FEET) = 0.00 "Z" FACTOR = 2.500
MANNING'S FACTOR = 0.030 MAXIMUM DEPTH(FEET) = 10.00
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 3.273
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" C 0.75 0.25 1.000 91
NATURAL POOR COVER
"BARREN" D 5.02 0.20 1.000 93
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.21
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 18.24
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 9.71 AVERAGE FLOW DEPTH(FEET) = 0.87 TRAVEL TIME(MIN.) = 1.00 Tc(MIN.) = 7.28
SUBAREA AREA(ACRES) = 5.77 SUBAREA RUNOFF(CFS) = 15.92
EFFECTIVE AREA(ACRES) = 9.20 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.22 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 9.2 PEAK FLOW RATE(CFS) = 25.31
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 0.98 FLOW VELOCITY(FEET/SEC.) = 10.51
LONGEST FLOWPATH FROM NODE 41.00 TO NODE 43.00 = 910.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 43.00 TO NODE 44.00 IS CODE = 51 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 640.00 DOWNSTREAM(FEET) = 630.00 CHANNEL LENGTH THRU SUBAREA(FEET) = 452.00 CHANNEL SLOPE = 0.0221 CHANNEL BASE(FEET) = 0.00 "Z" FACTOR = 2.500
MANNING'S FACTOR = 0.030 MAXIMUM DEPTH(FEET) = 10.00
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.985
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" A 1.26 0.40 1.000 78
NATURAL POOR COVER
"BARREN" C 4.83 0.25 1.000 91
NATURAL POOR COVER
"BARREN" D 2.48 0.20 1.000 93
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.26
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 35.84
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 5.94 AVERAGE FLOW DEPTH(FEET) = 1.55 TRAVEL TIME(MIN.) = 1.27 Tc(MIN.) = 8.55
SUBAREA AREA(ACRES) = 8.57 SUBAREA RUNOFF(CFS) = 21.04
EFFECTIVE AREA(ACRES) = 17.77 AREA-AVERAGED Fm(INCH/HR) = 0.24 AREA-AVERAGED Fp(INCH/HR) = 0.24 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 17.8 PEAK FLOW RATE(CFS) = 43.97
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 1.68 FLOW VELOCITY(FEET/SEC.) = 6.22
LONGEST FLOWPATH FROM NODE 41.00 TO NODE 44.00 = 1362.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 44.00 TO NODE 45.00 IS CODE = 51 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 630.00 DOWNSTREAM(FEET) = 611.20 CHANNEL LENGTH THRU SUBAREA(FEET) = 495.00 CHANNEL SLOPE = 0.0380 CHANNEL BASE(FEET) = 0.00 "Z" FACTOR = 2.500
MANNING'S FACTOR = 0.030 MAXIMUM DEPTH(FEET) = 10.00
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.791
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" A 0.52 0.40 1.000 78
NATURAL POOR COVER
"BARREN" C 1.76 0.25 1.000 91
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.28
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 46.54
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 7.73 AVERAGE FLOW DEPTH(FEET) = 1.55 TRAVEL TIME(MIN.) = 1.07 Tc(MIN.) = 9.62
SUBAREA AREA(ACRES) = 2.28 SUBAREA RUNOFF(CFS) = 5.14
EFFECTIVE AREA(ACRES) = 20.05 AREA-AVERAGED Fm(INCH/HR) = 0.24 AREA-AVERAGED Fp(INCH/HR) = 0.24 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 20.1 PEAK FLOW RATE(CFS) = 46.00
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 1.54 FLOW VELOCITY(FEET/SEC.) = 7.72
LONGEST FLOWPATH FROM NODE 41.00 TO NODE 45.00 = 1857.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 45.00 TO NODE 455.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 611.20 DOWNSTREAM(FEET) = 607.29 FLOW LENGTH(FEET) = 172.00 MANNING'S N = 0.013
DEPTH OF FLOW IN 30.0 INCH PIPE IS 20.0 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 13.23
ESTIMATED PIPE DIAMETER(INCH) = 30.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 46.00
PIPE TRAVEL TIME(MIN.) = 0.22 Tc(MIN.) = 9.83
LONGEST FLOWPATH FROM NODE 41.00 TO NODE 455.00 = 2029.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 455.00 TO NODE 455.00 IS CODE = 11 ---------------------------------------------------------------------------- >>>>>CONFLUENCE MEMORY BANK # 2 WITH THE MAIN-STREAM MEMORY<<<<< ============================================================================ ** MAIN STREAM CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 46.00 9.83 2.755 0.24( 0.24) 1.00 20.1 41.00
LONGEST FLOWPATH FROM NODE 41.00 TO NODE 455.00 = 2029.00 FEET. ** MEMORY BANK # 2 CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 303.08 6.35 3.540 0.23( 0.22) 0.94 93.6 32.00
2 332.51 7.88 3.129 0.23( 0.22) 0.94 118.8 26.00
3 345.05 8.66 2.964 0.23( 0.22) 0.94 131.6 13.00
4 350.38 9.32 2.840 0.23( 0.22) 0.94 140.6 10.00
5 362.66 11.05 2.577 0.23( 0.22) 0.94 162.8 23.00
6 362.63 11.06 2.576 0.23( 0.22) 0.94 163.0 21.00
7 356.94 12.36 2.417 0.23( 0.22) 0.93 172.2 425.00
8 331.41 16.55 2.044 0.23( 0.22) 0.93 193.7 400.00
LONGEST FLOWPATH FROM NODE 400.00 TO NODE 455.00 = 5348.00 FEET. ** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 342.05 6.35 3.540 0.23( 0.22) 0.94 106.6 32.00
2 374.83 7.88 3.129 0.23( 0.22) 0.95 134.9 26.00
3 388.91 8.66 2.964 0.23( 0.22) 0.95 149.3 13.00
4 395.48 9.32 2.840 0.23( 0.22) 0.95 159.6 10.00
5 400.00 9.83 2.755 0.23( 0.22) 0.95 167.2 41.00
6 405.40 11.05 2.577 0.23( 0.22) 0.94 182.9 23.00
7 405.34 11.06 2.576 0.23( 0.22) 0.94 183.0 21.00
8 396.75 12.36 2.417 0.23( 0.22) 0.94 192.2 425.00
9 364.40 16.55 2.044 0.23( 0.22) 0.94 213.8 400.00
TOTAL AREA(ACRES) = 213.8
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 405.40 Tc(MIN.) = 11.047
EFFECTIVE AREA(ACRES) = 182.87 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.23 AREA-AVERAGED Ap = 0.94 TOTAL AREA(ACRES) = 213.8
LONGEST FLOWPATH FROM NODE 400.00 TO NODE 455.00 = 5348.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 455.00 TO NODE 455.00 IS CODE = 12 ---------------------------------------------------------------------------- >>>>>CLEAR MEMORY BANK # 2 <<<<<
============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 455.00 TO NODE 460.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 607.29 DOWNSTREAM(FEET) = 503.97 FLOW LENGTH(FEET) = 1400.00 MANNING'S N = 0.013
DEPTH OF FLOW IN 51.0 INCH PIPE IS 39.0 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 34.85
ESTIMATED PIPE DIAMETER(INCH) = 51.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 405.40
PIPE TRAVEL TIME(MIN.) = 0.67 Tc(MIN.) = 11.72
LONGEST FLOWPATH FROM NODE 400.00 TO NODE 460.00 = 6748.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 455.00 TO NODE 460.00 IS CODE = 81 ---------------------------------------------------------------------------- >>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================ MAINLINE Tc(MIN.) = 11.72
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.492
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
USER-DEFINED - 0.24 0.40 0.100 -
USER-DEFINED - 3.80 0.20 0.100 -
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.21
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA AREA(ACRES) = 4.04 SUBAREA RUNOFF(CFS) = 8.98
EFFECTIVE AREA(ACRES) = 186.91 AREA-AVERAGED Fm(INCH/HR) = 0.21 AREA-AVERAGED Fp(INCH/HR) = 0.23 AREA-AVERAGED Ap = 0.93 TOTAL AREA(ACRES) = 217.8 PEAK FLOW RATE(CFS) = 405.40
NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE
**************************************************************************** FLOW PROCESS FROM NODE 465.00 TO NODE 460.00 IS CODE = 81 ---------------------------------------------------------------------------- >>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================ MAINLINE Tc(MIN.) = 11.72
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.492
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" A 1.64 0.40 1.000 78
NATURAL POOR COVER
"BARREN" D 2.45 0.20 1.000 93
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.28
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
SUBAREA AREA(ACRES) = 4.09 SUBAREA RUNOFF(CFS) = 8.14
EFFECTIVE AREA(ACRES) = 191.00 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.23 AREA-AVERAGED Ap = 0.93 TOTAL AREA(ACRES) = 221.9 PEAK FLOW RATE(CFS) = 405.40
NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE
**************************************************************************** FLOW PROCESS FROM NODE 460.00 TO NODE 470.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 503.97 DOWNSTREAM(FEET) = 444.42 FLOW LENGTH(FEET) = 1182.00 MANNING'S N = 0.013
DEPTH OF FLOW IN 54.0 INCH PIPE IS 42.8 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 30.00
ESTIMATED PIPE DIAMETER(INCH) = 54.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 405.40
PIPE TRAVEL TIME(MIN.) = 0.66 Tc(MIN.) = 12.37
LONGEST FLOWPATH FROM NODE 400.00 TO NODE 470.00 = 7930.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 460.00 TO NODE 470.00 IS CODE = 81 ---------------------------------------------------------------------------- >>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================ MAINLINE Tc(MIN.) = 12.37
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.415
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
USER-DEFINED - 3.53 0.20 0.100 -
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.20
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA AREA(ACRES) = 3.53 SUBAREA RUNOFF(CFS) = 7.61
EFFECTIVE AREA(ACRES) = 194.53 AREA-AVERAGED Fm(INCH/HR) = 0.21 AREA-AVERAGED Fp(INCH/HR) = 0.23 AREA-AVERAGED Ap = 0.91 TOTAL AREA(ACRES) = 225.4 PEAK FLOW RATE(CFS) = 405.40
NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE
**************************************************************************** FLOW PROCESS FROM NODE 470.00 TO NODE 470.00 IS CODE = 11 ---------------------------------------------------------------------------- >>>>>CONFLUENCE MEMORY BANK # 1 WITH THE MAIN-STREAM MEMORY<<<<< ============================================================================ ** MAIN STREAM CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 342.05 7.73 3.163 0.23( 0.21) 0.89 118.2 32.00
2 374.83 9.21 2.860 0.23( 0.21) 0.90 146.6 26.00
3 388.91 9.99 2.731 0.23( 0.21) 0.91 160.9 13.00
4 395.48 10.65 2.632 0.23( 0.21) 0.91 171.2 10.00
5 400.00 11.16 2.562 0.23( 0.21) 0.91 178.8 41.00
6 405.40 12.37 2.415 0.23( 0.21) 0.91 194.5 23.00
7 405.34 12.39 2.414 0.23( 0.21) 0.91 194.7 21.00
8 396.75 13.68 2.280 0.23( 0.21) 0.91 203.9 425.00
9 364.40 17.91 1.954 0.23( 0.21) 0.91 225.4 400.00
LONGEST FLOWPATH FROM NODE 400.00 TO NODE 470.00 = 7930.00 FEET. ** MEMORY BANK # 1 CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 184.20 12.31 2.423 0.24( 0.21) 0.88 84.7 370.00
2 192.54 14.94 2.168 0.24( 0.21) 0.88 101.6 360.00
3 192.81 15.22 2.145 0.24( 0.21) 0.88 103.1 381.00
4 192.31 15.75 2.104 0.24( 0.21) 0.88 105.3 390.00
5 191.47 16.44 2.053 0.24( 0.21) 0.88 108.0 315.00
6 186.60 17.32 1.992 0.24( 0.21) 0.88 109.2 300.00
7 170.62 20.75 1.796 0.24( 0.21) 0.88 113.1 340.00
LONGEST FLOWPATH FROM NODE 300.00 TO NODE 470.00 = 4805.00 FEET. ** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 496.39 7.73 3.163 0.23( 0.21) 0.89 171.5 32.00
2 539.95 9.21 2.860 0.23( 0.21) 0.90 210.0 26.00
3 559.20 9.99 2.731 0.23( 0.21) 0.90 229.7 13.00
4 569.97 10.65 2.632 0.23( 0.21) 0.90 244.6 10.00
5 577.57 11.16 2.562 0.23( 0.21) 0.90 255.7 41.00
6 589.30 12.31 2.423 0.23( 0.21) 0.90 278.4 370.00
7 589.82 12.37 2.415 0.23( 0.21) 0.90 279.7 23.00
8 589.80 12.39 2.414 0.23( 0.21) 0.90 279.9 21.00
9 585.31 13.68 2.280 0.23( 0.21) 0.90 297.5 425.00
10 579.66 14.94 2.168 0.23( 0.21) 0.90 311.9 360.00
11 577.78 15.22 2.145 0.23( 0.21) 0.90 314.9 381.00
12 573.26 15.75 2.104 0.23( 0.21) 0.90 319.7 390.00
13 567.18 16.44 2.053 0.24( 0.21) 0.90 325.9 315.00
14 555.52 17.32 1.992 0.24( 0.21) 0.90 331.6 300.00
15 548.26 17.91 1.954 0.24( 0.21) 0.90 335.3 400.00
16 501.99 20.75 1.796 0.24( 0.21) 0.90 338.5 340.00
TOTAL AREA(ACRES) = 338.5
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 589.82 Tc(MIN.) = 12.374
EFFECTIVE AREA(ACRES) = 279.70 AREA-AVERAGED Fm(INCH/HR) = 0.21 AREA-AVERAGED Fp(INCH/HR) = 0.23 AREA-AVERAGED Ap = 0.90 TOTAL AREA(ACRES) = 338.5
LONGEST FLOWPATH FROM NODE 400.00 TO NODE 470.00 = 7930.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 470.00 TO NODE 470.00 IS CODE = 12 ---------------------------------------------------------------------------- >>>>>CLEAR MEMORY BANK # 1 <<<<<
============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 470.00 TO NODE 475.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 444.42 DOWNSTREAM(FEET) = 435.96 FLOW LENGTH(FEET) = 383.00 MANNING'S N = 0.013
DEPTH OF FLOW IN 72.0 INCH PIPE IS 58.2 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 24.08
ESTIMATED PIPE DIAMETER(INCH) = 72.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 589.82
PIPE TRAVEL TIME(MIN.) = 0.27 Tc(MIN.) = 12.64
LONGEST FLOWPATH FROM NODE 400.00 TO NODE 475.00 = 8313.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 470.00 TO NODE 475.00 IS CODE = 81 ---------------------------------------------------------------------------- >>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================ MAINLINE Tc(MIN.) = 12.64
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.386
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
USER-DEFINED - 1.05 0.20 0.100 -
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.20
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100
SUBAREA AREA(ACRES) = 1.05 SUBAREA RUNOFF(CFS) = 2.24
EFFECTIVE AREA(ACRES) = 280.75 AREA-AVERAGED Fm(INCH/HR) = 0.21 AREA-AVERAGED Fp(INCH/HR) = 0.23 AREA-AVERAGED Ap = 0.90 TOTAL AREA(ACRES) = 339.5 PEAK FLOW RATE(CFS) = 589.82
NOTE: PEAK FLOW RATE DEFAULTED TO UPSTREAM VALUE
**************************************************************************** FLOW PROCESS FROM NODE 475.00 TO NODE 480.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 435.96 DOWNSTREAM(FEET) = 415.33 FLOW LENGTH(FEET) = 279.00 MANNING'S N = 0.013
DEPTH OF FLOW IN 60.0 INCH PIPE IS 43.6 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 38.59
ESTIMATED PIPE DIAMETER(INCH) = 60.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 589.82
PIPE TRAVEL TIME(MIN.) = 0.12 Tc(MIN.) = 12.76
LONGEST FLOWPATH FROM NODE 400.00 TO NODE 480.00 = 8592.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 500.00 TO NODE 501.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< ============================================================================ INITIAL SUBAREA FLOW-LENGTH(FEET) = 186.00
ELEVATION DATA: UPSTREAM(FEET) = 584.02 DOWNSTREAM(FEET) = 508.34 Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 5.082
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 4.022
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
NATURAL POOR COVER
"BARREN" A 2.50 0.40 1.000 78 5.08
NATURAL POOR COVER
"BARREN" C 0.32 0.25 1.000 91 5.08
NATURAL POOR COVER
"BARREN" D 1.77 0.20 1.000 93 5.08
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.31
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
SUBAREA RUNOFF(CFS) = 15.32
TOTAL AREA(ACRES) = 4.59 PEAK FLOW RATE(CFS) = 15.32
**************************************************************************** FLOW PROCESS FROM NODE 501.00 TO NODE 505.00 IS CODE = 51 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 508.34 DOWNSTREAM(FEET) = 492.05 CHANNEL LENGTH THRU SUBAREA(FEET) = 228.00 CHANNEL SLOPE = 0.0714 CHANNEL BASE(FEET) = 0.00 "Z" FACTOR = 2.500
MANNING'S FACTOR = 0.030 MAXIMUM DEPTH(FEET) = 10.00
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 3.820
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" A 2.88 0.40 1.000 78
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.40
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 19.76
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 7.96 AVERAGE FLOW DEPTH(FEET) = 1.00 TRAVEL TIME(MIN.) = 0.48 Tc(MIN.) = 5.56
SUBAREA AREA(ACRES) = 2.88 SUBAREA RUNOFF(CFS) = 8.86
EFFECTIVE AREA(ACRES) = 7.47 AREA-AVERAGED Fm(INCH/HR) = 0.35 AREA-AVERAGED Fp(INCH/HR) = 0.35 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 7.5 PEAK FLOW RATE(CFS) = 23.35
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 1.06 FLOW VELOCITY(FEET/SEC.) = 8.26
LONGEST FLOWPATH FROM NODE 500.00 TO NODE 505.00 = 414.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 600.00 TO NODE 605.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< ============================================================================ INITIAL SUBAREA FLOW-LENGTH(FEET) = 309.00
ELEVATION DATA: UPSTREAM(FEET) = 652.62 DOWNSTREAM(FEET) = 561.68 Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 6.643
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 3.450
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
NATURAL POOR COVER
"BARREN" C 1.89 0.25 1.000 91 6.64
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
SUBAREA RUNOFF(CFS) = 5.44
TOTAL AREA(ACRES) = 1.89 PEAK FLOW RATE(CFS) = 5.44
**************************************************************************** FLOW PROCESS FROM NODE 605.00 TO NODE 610.00 IS CODE = 56 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 561.68 DOWNSTREAM(FEET) = 451.03 CHANNEL LENGTH THRU SUBAREA(FEET) = 868.00 CHANNEL SLOPE = 0.1275 GIVEN CHANNEL BASE(FEET) = 10.00 CHANNEL FREEBOARD(FEET) = 0.0 "Z" FACTOR = 2.500 MANNING'S FACTOR = 0.030
*ESTIMATED CHANNEL HEIGHT(FEET) = 0.31
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 2.971
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" C 13.84 0.25 1.000 91
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 22.50
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 7.31 AVERAGE FLOW DEPTH(FEET) = 0.29 TRAVEL TIME(MIN.) = 1.98 Tc(MIN.) = 8.62
SUBAREA AREA(ACRES) = 13.84 SUBAREA RUNOFF(CFS) = 33.89 EFFECTIVE AREA(ACRES) = 15.73 AREA-AVERAGED Fm(INCH/HR) = 0.25 AREA-AVERAGED Fp(INCH/HR) = 0.25 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 15.7 PEAK FLOW RATE(CFS) = 38.52
GIVEN CHANNEL BASE(FEET) = 10.00 CHANNEL FREEBOARD(FEET) = 0.0 "Z" FACTOR = 2.500 MANNING'S FACTOR = 0.030
*ESTIMATED CHANNEL HEIGHT(FEET) = 0.39
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 0.39 FLOW VELOCITY(FEET/SEC.) = 8.90
LONGEST FLOWPATH FROM NODE 600.00 TO NODE 610.00 = 1177.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 700.00 TO NODE 701.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< ============================================================================ INITIAL SUBAREA FLOW-LENGTH(FEET) = 194.00
ELEVATION DATA: UPSTREAM(FEET) = 820.48 DOWNSTREAM(FEET) = 754.03 Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 5.350
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 3.905
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
NATURAL POOR COVER
"BARREN" C 0.13 0.25 1.000 91 5.35
NATURAL POOR COVER
"BARREN" D 0.54 0.20 1.000 93 5.35
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.21
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
SUBAREA RUNOFF(CFS) = 2.23
TOTAL AREA(ACRES) = 0.67 PEAK FLOW RATE(CFS) = 2.23
**************************************************************************** FLOW PROCESS FROM NODE 701.00 TO NODE 705.00 IS CODE = 56 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 754.03 DOWNSTREAM(FEET) = 622.26 CHANNEL LENGTH THRU SUBAREA(FEET) = 668.00 CHANNEL SLOPE = 0.1973 GIVEN CHANNEL BASE(FEET) = 10.00 CHANNEL FREEBOARD(FEET) = 0.0 "Z" FACTOR = 2.500 MANNING'S FACTOR = 0.030
*ESTIMATED CHANNEL HEIGHT(FEET) = 0.12
* 10 YEAR RAINFALL INTENSITY(INCH/HR) = 3.187
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
NATURAL POOR COVER
"BARREN" C 0.34 0.25 1.000 91
NATURAL POOR COVER
"BARREN" D 2.08 0.20 1.000 93
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.21
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 5.51
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 4.89 AVERAGE FLOW DEPTH(FEET) = 0.11 TRAVEL TIME(MIN.) = 2.28 Tc(MIN.) = 7.63
SUBAREA AREA(ACRES) = 2.42 SUBAREA RUNOFF(CFS) = 6.49
EFFECTIVE AREA(ACRES) = 3.09 AREA-AVERAGED Fm(INCH/HR) = 0.21 AREA-AVERAGED Fp(INCH/HR) = 0.21 AREA-AVERAGED Ap = 1.00 TOTAL AREA(ACRES) = 3.1 PEAK FLOW RATE(CFS) = 8.29
GIVEN CHANNEL BASE(FEET) = 10.00 CHANNEL FREEBOARD(FEET) = 0.0 "Z" FACTOR = 2.500 MANNING'S FACTOR = 0.030
*ESTIMATED CHANNEL HEIGHT(FEET) = 0.14
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 0.14 FLOW VELOCITY(FEET/SEC.) = 5.71
LONGEST FLOWPATH FROM NODE 700.00 TO NODE 705.00 = 862.00 FEET. ============================================================================ END OF STUDY SUMMARY:
TOTAL AREA(ACRES) = 3.1 TC(MIN.) = 7.63
EFFECTIVE AREA(ACRES) = 3.09 AREA-AVERAGED Fm(INCH/HR)= 0.21 AREA-AVERAGED Fp(INCH/HR) = 0.21 AREA-AVERAGED Ap = 1.000 PEAK FLOW RATE(CFS) = 8.29
============================================================================ ============================================================================
END OF RATIONAL METHOD ANALYSIS
____________________________________________________________________________ ****************************************************************************
RATIONAL METHOD HYDROLOGY COMPUTER PROGRAM PACKAGE
(Reference: 1986 ORANGE COUNTY HYDROLOGY CRITERION)
(c) Copyright 1983-2014 Advanced Engineering Software (aes) Ver. 21.0 Release Date: 06/01/2014 License ID 1202
Analysis prepared by:
Huitt-Zollars, Inc.
2603 Main Street, Suite 400
Irvine, CA 92614
Tel - 949-988-5815
************************** DESCRIPTION OF STUDY ************************** * GYPSUM CANYON CEMETERY WITH OFFSITE FLOW *
* PROPOSED CONDITION - 25 YEAR STORM EVENT *
* HHTUN REV CGULLIXSON *
************************************************************************** FILE NAME: GCP_25.DAT
TIME/DATE OF STUDY: 10:03 10/04/2023
============================================================================ USER SPECIFIED HYDROLOGY AND HYDRAULIC MODEL INFORMATION:
============================================================================ --*TIME-OF-CONCENTRATION MODEL*--
USER SPECIFIED STORM EVENT(YEAR) = 25.00
SPECIFIED MINIMUM PIPE SIZE(INCH) = 12.00
SPECIFIED PERCENT OF GRADIENTS(DECIMAL) TO USE FOR FRICTION SLOPE = 0.90 *DATA BANK RAINFALL USED*
*ANTECEDENT MOISTURE CONDITION (AMC) II ASSUMED FOR RATIONAL METHOD* *USER-DEFINED STREET-SECTIONS FOR COUPLED PIPEFLOW AND STREETFLOW MODEL* HALF- CROWN TO STREET-CROSSFALL: CURB GUTTER-GEOMETRIES: MANNING
WIDTH CROSSFALL IN- / OUT-/PARK- HEIGHT WIDTH LIP HIKE FACTOR NO. (FT) (FT) SIDE / SIDE/ WAY (FT) (FT) (FT) (FT) (n)
=== ===== ========= ================= ====== ===== ====== ===== ======= 1 32.0 16.0 0.018/0.018/0.020 0.67 2.00 0.0312 0.167 0.0150 GLOBAL STREET FLOW-DEPTH CONSTRAINTS:
1. Relative Flow-Depth = 0.00 FEET
as (Maximum Allowable Street Flow Depth) - (Top-of-Curb)
2. (Depth)*(Velocity) Constraint = 6.0 (FT*FT/S)
*SIZE PIPE WITH A FLOW CAPACITY GREATER THAN
OR EQUAL TO THE UPSTREAM TRIBUTARY PIPE.*
*USER-SPECIFIED MINIMUM TOPOGRAPHIC SLOPE ADJUSTMENT NOT SELECTED **************************************************************************** FLOW PROCESS FROM NODE 100.00 TO NODE 105.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< ============================================================================ INITIAL SUBAREA FLOW-LENGTH(FEET) = 103.00
ELEVATION DATA: UPSTREAM(FEET) = 450.02 DOWNSTREAM(FEET) = 417.40 Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 5.000
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 4.824
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
NATURAL POOR COVER
"BARREN" C 4.20 0.25 1.000 91 5.00
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
SUBAREA RUNOFF(CFS) = 17.29
TOTAL AREA(ACRES) = 4.20 PEAK FLOW RATE(CFS) = 17.29
**************************************************************************** FLOW PROCESS FROM NODE 200.00 TO NODE 205.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< ============================================================================ INITIAL SUBAREA FLOW-LENGTH(FEET) = 389.00
ELEVATION DATA: UPSTREAM(FEET) = 443.03 DOWNSTREAM(FEET) = 406.00 Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 9.129
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.431
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
NATURAL POOR COVER
"BARREN" A 0.62 0.40 1.000 78 9.13
NATURAL POOR COVER
"BARREN" B 0.27 0.30 1.000 86 9.13
NATURAL POOR COVER
"BARREN" C 0.35 0.25 1.000 91 9.13
NATURAL POOR COVER
"BARREN" D 7.62 0.20 1.000 93 9.13
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.22
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 1.000
SUBAREA RUNOFF(CFS) = 25.61
TOTAL AREA(ACRES) = 8.86 PEAK FLOW RATE(CFS) = 25.61
**************************************************************************** FLOW PROCESS FROM NODE 300.00 TO NODE 301.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< ============================================================================ INITIAL SUBAREA FLOW-LENGTH(FEET) = 235.00
ELEVATION DATA: UPSTREAM(FEET) = 642.77 DOWNSTREAM(FEET) = 562.32 Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 7.769
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.759
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
URBAN GOOD COVER
"TURF" - 0.69 0.25 0.900 93 7.77
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.900
SUBAREA RUNOFF(CFS) = 2.19
TOTAL AREA(ACRES) = 0.69 PEAK FLOW RATE(CFS) = 2.19
**************************************************************************** FLOW PROCESS FROM NODE 301.00 TO NODE 305.00 IS CODE = 51 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 562.32 DOWNSTREAM(FEET) = 474.58 CHANNEL LENGTH THRU SUBAREA(FEET) = 226.00 CHANNEL SLOPE = 0.3882 CHANNEL BASE(FEET) = 0.00 "Z" FACTOR = 3.000
MANNING'S FACTOR = 0.013 MAXIMUM DEPTH(FEET) = 10.00
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.704
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
USER-DEFINED - 1.29 0.25 0.900 -
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.900
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 4.21
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 18.24 AVERAGE FLOW DEPTH(FEET) = 0.28 TRAVEL TIME(MIN.) = 0.21 Tc(MIN.) = 7.98
SUBAREA AREA(ACRES) = 1.29 SUBAREA RUNOFF(CFS) = 4.04
EFFECTIVE AREA(ACRES) = 1.98 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.25 AREA-AVERAGED Ap = 0.90 TOTAL AREA(ACRES) = 2.0 PEAK FLOW RATE(CFS) = 6.20
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 0.32 FLOW VELOCITY(FEET/SEC.) = 20.49
LONGEST FLOWPATH FROM NODE 300.00 TO NODE 305.00 = 461.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 305.00 TO NODE 306.00 IS CODE = 51 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 474.58 DOWNSTREAM(FEET) = 468.10 CHANNEL LENGTH THRU SUBAREA(FEET) = 356.00 CHANNEL SLOPE = 0.0182 CHANNEL BASE(FEET) = 0.00 "Z" FACTOR = 3.000
MANNING'S FACTOR = 0.013 MAXIMUM DEPTH(FEET) = 10.00
CHANNEL FLOW THRU SUBAREA(CFS) = 6.20
FLOW VELOCITY(FEET/SEC.) = 6.42 FLOW DEPTH(FEET) = 0.57 TRAVEL TIME(MIN.) = 0.92 Tc(MIN.) = 8.90
LONGEST FLOWPATH FROM NODE 300.00 TO NODE 306.00 = 817.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 306.00 TO NODE 306.00 IS CODE = 1 ---------------------------------------------------------------------------- >>>>>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE<<<<<
============================================================================ TOTAL NUMBER OF STREAMS = 2
CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 1 ARE:
TIME OF CONCENTRATION(MIN.) = 8.90
RAINFALL INTENSITY(INCH/HR) = 3.48
AREA-AVERAGED Fm(INCH/HR) = 0.22
AREA-AVERAGED Fp(INCH/HR) = 0.25
AREA-AVERAGED Ap = 0.90
EFFECTIVE STREAM AREA(ACRES) = 1.98
TOTAL STREAM AREA(ACRES) = 1.98
PEAK FLOW RATE(CFS) AT CONFLUENCE = 6.20
**************************************************************************** FLOW PROCESS FROM NODE 315.00 TO NODE 316.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< ============================================================================ INITIAL SUBAREA FLOW-LENGTH(FEET) = 243.00
ELEVATION DATA: UPSTREAM(FEET) = 648.21 DOWNSTREAM(FEET) = 563.05 Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 7.836
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.740
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
URBAN GOOD COVER
"TURF" - 3.55 0.25 0.900 93 7.84
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.900
SUBAREA RUNOFF(CFS) = 11.23
TOTAL AREA(ACRES) = 3.55 PEAK FLOW RATE(CFS) = 11.23
**************************************************************************** FLOW PROCESS FROM NODE 316.00 TO NODE 306.00 IS CODE = 51 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 563.05 DOWNSTREAM(FEET) = 468.10 CHANNEL LENGTH THRU SUBAREA(FEET) = 442.00 CHANNEL SLOPE = 0.2148 CHANNEL BASE(FEET) = 0.00 "Z" FACTOR = 3.000
MANNING'S FACTOR = 0.013 MAXIMUM DEPTH(FEET) = 10.00
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.651
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
USER-DEFINED - 5.08 0.25 0.900 -
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.900
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 19.06
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 21.43 AVERAGE FLOW DEPTH(FEET) = 0.54 TRAVEL TIME(MIN.) = 0.34 Tc(MIN.) = 8.18
SUBAREA AREA(ACRES) = 5.08 SUBAREA RUNOFF(CFS) = 15.66
EFFECTIVE AREA(ACRES) = 8.63 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.25 AREA-AVERAGED Ap = 0.90 TOTAL AREA(ACRES) = 8.6 PEAK FLOW RATE(CFS) = 26.61
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 0.62 FLOW VELOCITY(FEET/SEC.) = 23.44
LONGEST FLOWPATH FROM NODE 315.00 TO NODE 306.00 = 685.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 306.00 TO NODE 306.00 IS CODE = 1 ---------------------------------------------------------------------------- >>>>>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE<<<<<
>>>>>AND COMPUTE VARIOUS CONFLUENCED STREAM VALUES<<<<< ============================================================================ TOTAL NUMBER OF STREAMS = 2
CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 2 ARE:
TIME OF CONCENTRATION(MIN.) = 8.18
RAINFALL INTENSITY(INCH/HR) = 3.65
AREA-AVERAGED Fm(INCH/HR) = 0.22
AREA-AVERAGED Fp(INCH/HR) = 0.25
AREA-AVERAGED Ap = 0.90
EFFECTIVE STREAM AREA(ACRES) = 8.63
TOTAL STREAM AREA(ACRES) = 8.63
PEAK FLOW RATE(CFS) AT CONFLUENCE = 26.61
** CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 6.20 8.90 3.481 0.25( 0.22) 0.90 2.0 300.00
2 26.61 8.18 3.651 0.25( 0.22) 0.90 8.6 315.00
RAINFALL INTENSITY AND TIME OF CONCENTRATION RATIO
CONFLUENCE FORMULA USED FOR 2 STREAMS.
** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 32.60 8.18 3.651 0.25( 0.22) 0.90 10.4 315.00
2 31.49 8.90 3.481 0.25( 0.22) 0.90 10.6 300.00
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 32.60 Tc(MIN.) = 8.18
EFFECTIVE AREA(ACRES) = 10.45 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.25 AREA-AVERAGED Ap = 0.90 TOTAL AREA(ACRES) = 10.6
LONGEST FLOWPATH FROM NODE 300.00 TO NODE 306.00 = 817.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 306.00 TO NODE 310.00 IS CODE = 51 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 468.10 DOWNSTREAM(FEET) = 450.93 CHANNEL LENGTH THRU SUBAREA(FEET) = 828.00 CHANNEL SLOPE = 0.0207 CHANNEL BASE(FEET) = 0.00 "Z" FACTOR = 3.000
MANNING'S FACTOR = 0.013 MAXIMUM DEPTH(FEET) = 10.00
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.362
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
USER-DEFINED - 5.79 0.25 0.900 -
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.900
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 40.78
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 10.75 AVERAGE FLOW DEPTH(FEET) = 1.12 TRAVEL TIME(MIN.) = 1.28 Tc(MIN.) = 9.46
SUBAREA AREA(ACRES) = 5.79 SUBAREA RUNOFF(CFS) = 16.35
EFFECTIVE AREA(ACRES) = 16.24 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.25 AREA-AVERAGED Ap = 0.90 TOTAL AREA(ACRES) = 16.4 PEAK FLOW RATE(CFS) = 45.85
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 1.17 FLOW VELOCITY(FEET/SEC.) = 11.12
LONGEST FLOWPATH FROM NODE 300.00 TO NODE 310.00 = 1645.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 310.00 TO NODE 325.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 446.99 DOWNSTREAM(FEET) = 442.15 FLOW LENGTH(FEET) = 949.00 MANNING'S N = 0.013
DEPTH OF FLOW IN 39.0 INCH PIPE IS 26.9 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 7.52
ESTIMATED PIPE DIAMETER(INCH) = 39.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 45.85
PIPE TRAVEL TIME(MIN.) = 2.10 Tc(MIN.) = 11.57
LONGEST FLOWPATH FROM NODE 300.00 TO NODE 325.00 = 2594.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 310.00 TO NODE 325.00 IS CODE = 81 ---------------------------------------------------------------------------- >>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================ MAINLINE Tc(MIN.) = 11.57
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.001
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
USER-DEFINED - 10.81 0.25 0.900 -
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.900
SUBAREA AREA(ACRES) = 10.81 SUBAREA RUNOFF(CFS) = 27.01 EFFECTIVE AREA(ACRES) = 27.05 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.25 AREA-AVERAGED Ap = 0.90 TOTAL AREA(ACRES) = 27.2 PEAK FLOW RATE(CFS) = 67.58
**************************************************************************** FLOW PROCESS FROM NODE 325.00 TO NODE 330.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 442.15 DOWNSTREAM(FEET) = 435.30 FLOW LENGTH(FEET) = 1427.00 MANNING'S N = 0.013
DEPTH OF FLOW IN 45.0 INCH PIPE IS 31.9 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 8.08
ESTIMATED PIPE DIAMETER(INCH) = 45.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 67.58
PIPE TRAVEL TIME(MIN.) = 2.94 Tc(MIN.) = 14.51
LONGEST FLOWPATH FROM NODE 300.00 TO NODE 330.00 = 4021.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 325.00 TO NODE 330.00 IS CODE = 81 ---------------------------------------------------------------------------- >>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================ MAINLINE Tc(MIN.) = 14.51
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 2.639
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
USER-DEFINED - 15.23 0.25 0.900 -
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.900
SUBAREA AREA(ACRES) = 15.23 SUBAREA RUNOFF(CFS) = 33.09 EFFECTIVE AREA(ACRES) = 42.28 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.25 AREA-AVERAGED Ap = 0.90 TOTAL AREA(ACRES) = 42.4 PEAK FLOW RATE(CFS) = 91.87
**************************************************************************** FLOW PROCESS FROM NODE 330.00 TO NODE 330.00 IS CODE = 10 ---------------------------------------------------------------------------- >>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 1 <<<<< ============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 340.00 TO NODE 341.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< ============================================================================ INITIAL SUBAREA FLOW-LENGTH(FEET) = 227.00
ELEVATION DATA: UPSTREAM(FEET) = 497.15 DOWNSTREAM(FEET) = 490.66 Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 12.588
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 2.860
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
URBAN GOOD COVER
"TURF" - 0.64 0.25 0.900 93 12.59
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.900
SUBAREA RUNOFF(CFS) = 1.52
TOTAL AREA(ACRES) = 0.64 PEAK FLOW RATE(CFS) = 1.52
**************************************************************************** FLOW PROCESS FROM NODE 341.00 TO NODE 342.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 486.64 DOWNSTREAM(FEET) = 469.80 FLOW LENGTH(FEET) = 405.00 MANNING'S N = 0.013
ESTIMATED PIPE DIAMETER(INCH) INCREASED TO 12.000
DEPTH OF FLOW IN 12.0 INCH PIPE IS 3.8 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 7.03
ESTIMATED PIPE DIAMETER(INCH) = 12.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 1.52
PIPE TRAVEL TIME(MIN.) = 0.96 Tc(MIN.) = 13.55
LONGEST FLOWPATH FROM NODE 340.00 TO NODE 342.00 = 632.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 341.00 TO NODE 342.00 IS CODE = 81 ---------------------------------------------------------------------------- >>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================ MAINLINE Tc(MIN.) = 13.55
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 2.744
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
USER-DEFINED - 1.68 0.25 0.900 -
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.900
SUBAREA AREA(ACRES) = 1.68 SUBAREA RUNOFF(CFS) = 3.81
EFFECTIVE AREA(ACRES) = 2.32 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.25 AREA-AVERAGED Ap = 0.90 TOTAL AREA(ACRES) = 2.3 PEAK FLOW RATE(CFS) = 5.26
**************************************************************************** FLOW PROCESS FROM NODE 342.00 TO NODE 342.00 IS CODE = 81 ---------------------------------------------------------------------------- >>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================ MAINLINE Tc(MIN.) = 13.55
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 2.744
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
USER-DEFINED - 2.86 0.25 0.900 -
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.900
SUBAREA AREA(ACRES) = 2.86 SUBAREA RUNOFF(CFS) = 6.48
EFFECTIVE AREA(ACRES) = 5.18 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.25 AREA-AVERAGED Ap = 0.90 TOTAL AREA(ACRES) = 5.2 PEAK FLOW RATE(CFS) = 11.74
**************************************************************************** FLOW PROCESS FROM NODE 342.00 TO NODE 345.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 469.80 DOWNSTREAM(FEET) = 466.71 FLOW LENGTH(FEET) = 424.00 MANNING'S N = 0.013
DEPTH OF FLOW IN 21.0 INCH PIPE IS 15.8 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 6.05
ESTIMATED PIPE DIAMETER(INCH) = 21.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 11.74
PIPE TRAVEL TIME(MIN.) = 1.17 Tc(MIN.) = 14.72
LONGEST FLOWPATH FROM NODE 340.00 TO NODE 345.00 = 1056.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 342.00 TO NODE 345.00 IS CODE = 81 ---------------------------------------------------------------------------- >>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================ MAINLINE Tc(MIN.) = 14.72
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 2.618
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
USER-DEFINED - 1.76 0.25 0.900 -
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.900
SUBAREA AREA(ACRES) = 1.76 SUBAREA RUNOFF(CFS) = 3.79
EFFECTIVE AREA(ACRES) = 6.94 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.25 AREA-AVERAGED Ap = 0.90 TOTAL AREA(ACRES) = 6.9 PEAK FLOW RATE(CFS) = 14.95
**************************************************************************** FLOW PROCESS FROM NODE 345.00 TO NODE 350.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 466.71 DOWNSTREAM(FEET) = 460.61 FLOW LENGTH(FEET) = 1241.00 MANNING'S N = 0.013
DEPTH OF FLOW IN 24.0 INCH PIPE IS 19.5 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 5.46
ESTIMATED PIPE DIAMETER(INCH) = 24.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 14.95
PIPE TRAVEL TIME(MIN.) = 3.79 Tc(MIN.) = 18.50
LONGEST FLOWPATH FROM NODE 340.00 TO NODE 350.00 = 2297.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 345.00 TO NODE 350.00 IS CODE = 81 ---------------------------------------------------------------------------- >>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================ MAINLINE Tc(MIN.) = 18.50
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 2.300
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
USER-DEFINED - 4.17 0.25 0.900 -
USER-DEFINED - 9.20 0.20 0.900 -
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.22
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.900
SUBAREA AREA(ACRES) = 13.37 SUBAREA RUNOFF(CFS) = 25.34 EFFECTIVE AREA(ACRES) = 20.31 AREA-AVERAGED Fm(INCH/HR) = 0.20 AREA-AVERAGED Fp(INCH/HR) = 0.23 AREA-AVERAGED Ap = 0.90 TOTAL AREA(ACRES) = 20.3 PEAK FLOW RATE(CFS) = 38.30
**************************************************************************** FLOW PROCESS FROM NODE 350.00 TO NODE 350.00 IS CODE = 81 ---------------------------------------------------------------------------- >>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================ MAINLINE Tc(MIN.) = 18.50
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 2.300
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
USER-DEFINED - 1.36 0.20 0.900 -
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.20
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.900
SUBAREA AREA(ACRES) = 1.36 SUBAREA RUNOFF(CFS) = 2.60
EFFECTIVE AREA(ACRES) = 21.67 AREA-AVERAGED Fm(INCH/HR) = 0.20 AREA-AVERAGED Fp(INCH/HR) = 0.23 AREA-AVERAGED Ap = 0.90 TOTAL AREA(ACRES) = 21.7 PEAK FLOW RATE(CFS) = 40.90
**************************************************************************** FLOW PROCESS FROM NODE 350.00 TO NODE 330.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 460.61 DOWNSTREAM(FEET) = 435.30 FLOW LENGTH(FEET) = 431.00 MANNING'S N = 0.013
DEPTH OF FLOW IN 24.0 INCH PIPE IS 16.0 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 18.34
ESTIMATED PIPE DIAMETER(INCH) = 24.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 40.90
PIPE TRAVEL TIME(MIN.) = 0.39 Tc(MIN.) = 18.90
LONGEST FLOWPATH FROM NODE 340.00 TO NODE 330.00 = 2728.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 330.00 TO NODE 330.00 IS CODE = 11 ---------------------------------------------------------------------------- >>>>>CONFLUENCE MEMORY BANK # 1 WITH THE MAIN-STREAM MEMORY<<<<< ============================================================================ ** MAIN STREAM CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 40.90 18.90 2.273 0.23( 0.20) 0.90 21.7 340.00
LONGEST FLOWPATH FROM NODE 340.00 TO NODE 330.00 = 2728.00 FEET. ** MEMORY BANK # 1 CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 91.87 14.51 2.639 0.25( 0.22) 0.90 42.3 315.00
2 88.93 15.39 2.553 0.25( 0.22) 0.90 42.4 300.00
LONGEST FLOWPATH FROM NODE 300.00 TO NODE 330.00 = 4021.00 FEET. ** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 128.84 14.51 2.639 0.24( 0.22) 0.90 58.9 315.00
2 126.74 15.39 2.553 0.24( 0.22) 0.90 60.1 300.00
3 119.13 18.90 2.273 0.24( 0.22) 0.90 64.1 340.00
TOTAL AREA(ACRES) = 64.1
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 128.84 Tc(MIN.) = 14.510
EFFECTIVE AREA(ACRES) = 58.92 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.24 AREA-AVERAGED Ap = 0.90 TOTAL AREA(ACRES) = 64.1
LONGEST FLOWPATH FROM NODE 300.00 TO NODE 330.00 = 4021.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 330.00 TO NODE 330.00 IS CODE = 12 ---------------------------------------------------------------------------- >>>>>CLEAR MEMORY BANK # 1 <<<<<
============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 330.00 TO NODE 331.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 435.30 DOWNSTREAM(FEET) = 435.08 FLOW LENGTH(FEET) = 45.00 MANNING'S N = 0.013
DEPTH OF FLOW IN 54.0 INCH PIPE IS 43.7 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 9.35
ESTIMATED PIPE DIAMETER(INCH) = 54.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 128.84
PIPE TRAVEL TIME(MIN.) = 0.08 Tc(MIN.) = 14.59
LONGEST FLOWPATH FROM NODE 300.00 TO NODE 331.00 = 4066.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 331.00 TO NODE 331.00 IS CODE = 10 ---------------------------------------------------------------------------- >>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 1 <<<<< ============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 360.00 TO NODE 361.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< ============================================================================ INITIAL SUBAREA FLOW-LENGTH(FEET) = 330.00
ELEVATION DATA: UPSTREAM(FEET) = 642.10 DOWNSTREAM(FEET) = 554.86 Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 9.371
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.380
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
URBAN GOOD COVER
"TURF" - 4.70 0.25 0.900 93 9.37
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.900
SUBAREA RUNOFF(CFS) = 13.35
TOTAL AREA(ACRES) = 4.70 PEAK FLOW RATE(CFS) = 13.35
**************************************************************************** FLOW PROCESS FROM NODE 361.00 TO NODE 362.00 IS CODE = 51 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 554.86 DOWNSTREAM(FEET) = 497.36 CHANNEL LENGTH THRU SUBAREA(FEET) = 346.00 CHANNEL SLOPE = 0.1662 CHANNEL BASE(FEET) = 0.00 "Z" FACTOR = 3.000
MANNING'S FACTOR = 0.013 MAXIMUM DEPTH(FEET) = 10.00
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.321
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
USER-DEFINED - 3.17 0.25 0.900 -
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.900
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 17.77
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 19.29 AVERAGE FLOW DEPTH(FEET) = 0.55 TRAVEL TIME(MIN.) = 0.30 Tc(MIN.) = 9.67
SUBAREA AREA(ACRES) = 3.17 SUBAREA RUNOFF(CFS) = 8.83
EFFECTIVE AREA(ACRES) = 7.87 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.25 AREA-AVERAGED Ap = 0.90 TOTAL AREA(ACRES) = 7.9 PEAK FLOW RATE(CFS) = 21.93
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 0.60 FLOW VELOCITY(FEET/SEC.) = 20.31
LONGEST FLOWPATH FROM NODE 360.00 TO NODE 362.00 = 676.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 362.00 TO NODE 365.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 494.42 DOWNSTREAM(FEET) = 490.67 FLOW LENGTH(FEET) = 749.00 MANNING'S N = 0.013
DEPTH OF FLOW IN 30.0 INCH PIPE IS 20.2 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 6.23
ESTIMATED PIPE DIAMETER(INCH) = 30.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 21.93
PIPE TRAVEL TIME(MIN.) = 2.00 Tc(MIN.) = 11.67
LONGEST FLOWPATH FROM NODE 360.00 TO NODE 365.00 = 1425.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 362.00 TO NODE 365.00 IS CODE = 81 ---------------------------------------------------------------------------- >>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================ MAINLINE Tc(MIN.) = 11.67
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 2.985
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
USER-DEFINED - 5.36 0.25 0.500 -
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.500
SUBAREA AREA(ACRES) = 5.36 SUBAREA RUNOFF(CFS) = 13.80
EFFECTIVE AREA(ACRES) = 13.23 AREA-AVERAGED Fm(INCH/HR) = 0.18 AREA-AVERAGED Fp(INCH/HR) = 0.25 AREA-AVERAGED Ap = 0.74 TOTAL AREA(ACRES) = 13.2 PEAK FLOW RATE(CFS) = 33.35
**************************************************************************** FLOW PROCESS FROM NODE 365.00 TO NODE 376.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 490.67 DOWNSTREAM(FEET) = 479.26 FLOW LENGTH(FEET) = 253.00 MANNING'S N = 0.013
DEPTH OF FLOW IN 24.0 INCH PIPE IS 15.2 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 15.84
ESTIMATED PIPE DIAMETER(INCH) = 24.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 33.35
PIPE TRAVEL TIME(MIN.) = 0.27 Tc(MIN.) = 11.94
LONGEST FLOWPATH FROM NODE 360.00 TO NODE 376.00 = 1678.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 376.00 TO NODE 376.00 IS CODE = 10 ---------------------------------------------------------------------------- >>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 2 <<<<< ============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 370.00 TO NODE 371.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< ============================================================================ INITIAL SUBAREA FLOW-LENGTH(FEET) = 265.00
ELEVATION DATA: UPSTREAM(FEET) = 632.00 DOWNSTREAM(FEET) = 575.00 Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 8.945
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.471
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
URBAN GOOD COVER
"TURF" - 0.74 0.25 0.900 93 8.94
URBAN GOOD COVER
"TURF" - 2.23 0.20 0.900 93 8.94
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.21
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.900
SUBAREA RUNOFF(CFS) = 8.77
TOTAL AREA(ACRES) = 2.97 PEAK FLOW RATE(CFS) = 8.77
**************************************************************************** FLOW PROCESS FROM NODE 371.00 TO NODE 375.00 IS CODE = 51 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 575.00 DOWNSTREAM(FEET) = 498.11 CHANNEL LENGTH THRU SUBAREA(FEET) = 285.00 CHANNEL SLOPE = 0.2698 CHANNEL BASE(FEET) = 0.00 "Z" FACTOR = 3.000
MANNING'S FACTOR = 0.013 MAXIMUM DEPTH(FEET) = 10.00
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.422
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
USER-DEFINED - 2.37 0.25 0.900 -
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.900
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 12.18
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 21.00 AVERAGE FLOW DEPTH(FEET) = 0.44 TRAVEL TIME(MIN.) = 0.23 Tc(MIN.) = 9.17
SUBAREA AREA(ACRES) = 2.37 SUBAREA RUNOFF(CFS) = 6.82
EFFECTIVE AREA(ACRES) = 5.34 AREA-AVERAGED Fm(INCH/HR) = 0.21 AREA-AVERAGED Fp(INCH/HR) = 0.23 AREA-AVERAGED Ap = 0.90 TOTAL AREA(ACRES) = 5.3 PEAK FLOW RATE(CFS) = 15.46
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 0.48 FLOW VELOCITY(FEET/SEC.) = 22.04
LONGEST FLOWPATH FROM NODE 370.00 TO NODE 375.00 = 550.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 375.00 TO NODE 376.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 494.11 DOWNSTREAM(FEET) = 479.26 FLOW LENGTH(FEET) = 219.00 MANNING'S N = 0.013
DEPTH OF FLOW IN 15.0 INCH PIPE IS 11.9 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 14.82
ESTIMATED PIPE DIAMETER(INCH) = 15.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 15.46
PIPE TRAVEL TIME(MIN.) = 0.25 Tc(MIN.) = 9.42
LONGEST FLOWPATH FROM NODE 370.00 TO NODE 376.00 = 769.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 376.00 TO NODE 376.00 IS CODE = 11 ---------------------------------------------------------------------------- >>>>>CONFLUENCE MEMORY BANK # 2 WITH THE MAIN-STREAM MEMORY<<<<< ============================================================================ ** MAIN STREAM CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 15.46 9.42 3.371 0.23( 0.21) 0.90 5.3 370.00
LONGEST FLOWPATH FROM NODE 370.00 TO NODE 376.00 = 769.00 FEET. ** MEMORY BANK # 2 CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 33.35 11.94 2.947 0.25( 0.18) 0.74 13.2 360.00
LONGEST FLOWPATH FROM NODE 360.00 TO NODE 376.00 = 1678.00 FEET. ** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 45.79 9.42 3.371 0.24( 0.19) 0.79 15.8 370.00
2 46.73 11.94 2.947 0.24( 0.19) 0.78 18.6 360.00
TOTAL AREA(ACRES) = 18.6
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 46.73 Tc(MIN.) = 11.941
EFFECTIVE AREA(ACRES) = 18.57 AREA-AVERAGED Fm(INCH/HR) = 0.19 AREA-AVERAGED Fp(INCH/HR) = 0.24 AREA-AVERAGED Ap = 0.78 TOTAL AREA(ACRES) = 18.6
LONGEST FLOWPATH FROM NODE 360.00 TO NODE 376.00 = 1678.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 376.00 TO NODE 376.00 IS CODE = 12 ---------------------------------------------------------------------------- >>>>>CLEAR MEMORY BANK # 2 <<<<<
============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 376.00 TO NODE 380.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 479.26 DOWNSTREAM(FEET) = 456.49 FLOW LENGTH(FEET) = 508.00 MANNING'S N = 0.013
DEPTH OF FLOW IN 27.0 INCH PIPE IS 17.5 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 17.17
ESTIMATED PIPE DIAMETER(INCH) = 27.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 46.73
PIPE TRAVEL TIME(MIN.) = 0.49 Tc(MIN.) = 12.43
LONGEST FLOWPATH FROM NODE 360.00 TO NODE 380.00 = 2186.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 380.00 TO NODE 380.00 IS CODE = 10 ---------------------------------------------------------------------------- >>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 2 <<<<< ============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 381.00 TO NODE 382.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< ============================================================================ INITIAL SUBAREA FLOW-LENGTH(FEET) = 330.00
ELEVATION DATA: UPSTREAM(FEET) = 565.33 DOWNSTREAM(FEET) = 497.83 Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 9.864
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.284
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
URBAN FAIR COVER
"TURF" - 0.16 0.25 0.900 93 9.86
URBAN FAIR COVER
"TURF" - 0.48 0.25 0.900 93 9.86
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.900
SUBAREA RUNOFF(CFS) = 1.76
TOTAL AREA(ACRES) = 0.64 PEAK FLOW RATE(CFS) = 1.76
**************************************************************************** FLOW PROCESS FROM NODE 382.00 TO NODE 380.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 492.83 DOWNSTREAM(FEET) = 456.49 FLOW LENGTH(FEET) = 1146.00 MANNING'S N = 0.013
ESTIMATED PIPE DIAMETER(INCH) INCREASED TO 12.000
DEPTH OF FLOW IN 12.0 INCH PIPE IS 4.4 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 6.65
ESTIMATED PIPE DIAMETER(INCH) = 12.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 1.76
PIPE TRAVEL TIME(MIN.) = 2.87 Tc(MIN.) = 12.73
LONGEST FLOWPATH FROM NODE 381.00 TO NODE 380.00 = 1476.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 382.00 TO NODE 380.00 IS CODE = 81 ---------------------------------------------------------------------------- >>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================ MAINLINE Tc(MIN.) = 12.73
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 2.842
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
USER-DEFINED - 3.35 0.25 0.900 -
USER-DEFINED - 10.06 0.25 0.900 -
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.25
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.900
SUBAREA AREA(ACRES) = 13.41 SUBAREA RUNOFF(CFS) = 31.58 EFFECTIVE AREA(ACRES) = 14.05 AREA-AVERAGED Fm(INCH/HR) = 0.22 AREA-AVERAGED Fp(INCH/HR) = 0.25 AREA-AVERAGED Ap = 0.90 TOTAL AREA(ACRES) = 14.1 PEAK FLOW RATE(CFS) = 33.09
**************************************************************************** FLOW PROCESS FROM NODE 380.00 TO NODE 380.00 IS CODE = 11 ---------------------------------------------------------------------------- >>>>>CONFLUENCE MEMORY BANK # 2 WITH THE MAIN-STREAM MEMORY<<<<< ============================================================================ ** MAIN STREAM CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 33.09 12.73 2.842 0.25( 0.22) 0.90 14.1 381.00
LONGEST FLOWPATH FROM NODE 381.00 TO NODE 380.00 = 1476.00 FEET. ** MEMORY BANK # 2 CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 45.79 9.91 3.275 0.24( 0.19) 0.79 15.8 370.00
2 46.73 12.43 2.880 0.24( 0.19) 0.78 18.6 360.00
LONGEST FLOWPATH FROM NODE 360.00 TO NODE 380.00 = 2186.00 FEET. ** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 75.81 9.91 3.275 0.25( 0.21) 0.84 26.7 370.00
2 79.52 12.43 2.880 0.25( 0.21) 0.83 32.3 360.00
3 79.15 12.73 2.842 0.25( 0.21) 0.83 32.6 381.00
TOTAL AREA(ACRES) = 32.6
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 79.52 Tc(MIN.) = 12.434
EFFECTIVE AREA(ACRES) = 32.29 AREA-AVERAGED Fm(INCH/HR) = 0.21 AREA-AVERAGED Fp(INCH/HR) = 0.25 AREA-AVERAGED Ap = 0.83 TOTAL AREA(ACRES) = 32.6
LONGEST FLOWPATH FROM NODE 360.00 TO NODE 380.00 = 2186.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 380.00 TO NODE 380.00 IS CODE = 12 ---------------------------------------------------------------------------- >>>>>CLEAR MEMORY BANK # 2 <<<<<
============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 380.00 TO NODE 380.00 IS CODE = 10 ---------------------------------------------------------------------------- >>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 2 <<<<< ============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 390.00 TO NODE 391.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< ============================================================================ INITIAL SUBAREA FLOW-LENGTH(FEET) = 330.00
ELEVATION DATA: UPSTREAM(FEET) = 625.16 DOWNSTREAM(FEET) = 567.79 Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 10.190
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.224
SUBAREA Tc AND LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS Tc
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.)
URBAN GOOD COVER
"TURF" - 0.49 0.25 0.900 93 10.19
URBAN GOOD COVER
"TURF" - 1.48 0.20 0.900 93 10.19
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.21
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.900
SUBAREA RUNOFF(CFS) = 5.38
TOTAL AREA(ACRES) = 1.97 PEAK FLOW RATE(CFS) = 5.38
**************************************************************************** FLOW PROCESS FROM NODE 391.00 TO NODE 392.00 IS CODE = 51 ---------------------------------------------------------------------------- >>>>>COMPUTE TRAPEZOIDAL CHANNEL FLOW<<<<<
>>>>>TRAVELTIME THRU SUBAREA (EXISTING ELEMENT)<<<<<
============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 567.79 DOWNSTREAM(FEET) = 463.11 CHANNEL LENGTH THRU SUBAREA(FEET) = 1332.00 CHANNEL SLOPE = 0.0786 CHANNEL BASE(FEET) = 0.00 "Z" FACTOR = 3.000
MANNING'S FACTOR = 0.013 MAXIMUM DEPTH(FEET) = 10.00
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 2.921
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
USER-DEFINED - 0.30 0.25 0.900 -
USER-DEFINED - 0.91 0.20 0.900 -
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.21
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.900
TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 6.86
TRAVEL TIME THRU SUBAREA BASED ON VELOCITY(FEET/SEC.) = 11.44 AVERAGE FLOW DEPTH(FEET) = 0.45 TRAVEL TIME(MIN.) = 1.94 Tc(MIN.) = 12.13
SUBAREA AREA(ACRES) = 1.21 SUBAREA RUNOFF(CFS) = 2.97
EFFECTIVE AREA(ACRES) = 3.18 AREA-AVERAGED Fm(INCH/HR) = 0.19 AREA-AVERAGED Fp(INCH/HR) = 0.21 AREA-AVERAGED Ap = 0.90 TOTAL AREA(ACRES) = 3.2 PEAK FLOW RATE(CFS) = 7.81
END OF SUBAREA CHANNEL FLOW HYDRAULICS:
DEPTH(FEET) = 0.47 FLOW VELOCITY(FEET/SEC.) = 11.78
LONGEST FLOWPATH FROM NODE 390.00 TO NODE 392.00 = 1662.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 392.00 TO NODE 380.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 458.09 DOWNSTREAM(FEET) = 456.49 FLOW LENGTH(FEET) = 320.00 MANNING'S N = 0.013
DEPTH OF FLOW IN 21.0 INCH PIPE IS 13.4 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 4.83
ESTIMATED PIPE DIAMETER(INCH) = 21.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 7.81
PIPE TRAVEL TIME(MIN.) = 1.10 Tc(MIN.) = 13.24
LONGEST FLOWPATH FROM NODE 390.00 TO NODE 380.00 = 1982.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 380.00 TO NODE 380.00 IS CODE = 11 ---------------------------------------------------------------------------- >>>>>CONFLUENCE MEMORY BANK # 2 WITH THE MAIN-STREAM MEMORY<<<<< ============================================================================ ** MAIN STREAM CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 7.81 13.24 2.780 0.21( 0.19) 0.90 3.2 390.00
LONGEST FLOWPATH FROM NODE 390.00 TO NODE 380.00 = 1982.00 FEET. ** MEMORY BANK # 2 CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 75.81 9.91 3.275 0.25( 0.21) 0.84 26.7 370.00
2 79.52 12.43 2.880 0.25( 0.21) 0.83 32.3 360.00
3 79.15 12.73 2.842 0.25( 0.21) 0.83 32.6 381.00
LONGEST FLOWPATH FROM NODE 360.00 TO NODE 380.00 = 2186.00 FEET. ** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 82.78 9.91 3.275 0.24( 0.20) 0.84 29.1 370.00
2 87.14 12.43 2.880 0.24( 0.20) 0.84 35.3 360.00
3 86.85 12.73 2.842 0.24( 0.20) 0.84 35.7 381.00
4 85.12 13.24 2.780 0.24( 0.20) 0.84 35.8 390.00
TOTAL AREA(ACRES) = 35.8
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 87.14 Tc(MIN.) = 12.434
EFFECTIVE AREA(ACRES) = 35.28 AREA-AVERAGED Fm(INCH/HR) = 0.20 AREA-AVERAGED Fp(INCH/HR) = 0.24 AREA-AVERAGED Ap = 0.84 TOTAL AREA(ACRES) = 35.8
LONGEST FLOWPATH FROM NODE 360.00 TO NODE 380.00 = 2186.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 380.00 TO NODE 380.00 IS CODE = 12 ---------------------------------------------------------------------------- >>>>>CLEAR MEMORY BANK # 2 <<<<<
============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 380.00 TO NODE 331.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 456.49 DOWNSTREAM(FEET) = 435.08 FLOW LENGTH(FEET) = 774.00 MANNING'S N = 0.013
DEPTH OF FLOW IN 36.0 INCH PIPE IS 25.0 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 16.64
ESTIMATED PIPE DIAMETER(INCH) = 36.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 87.14
PIPE TRAVEL TIME(MIN.) = 0.78 Tc(MIN.) = 13.21
LONGEST FLOWPATH FROM NODE 360.00 TO NODE 331.00 = 2960.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 380.00 TO NODE 331.00 IS CODE = 81 ---------------------------------------------------------------------------- >>>>>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW<<<<<
============================================================================ MAINLINE Tc(MIN.) = 13.21
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 2.783
SUBAREA LOSS RATE DATA(AMC II):
DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS
LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN
USER-DEFINED - 13.14 0.20 0.900 -
SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.20
SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.900
SUBAREA AREA(ACRES) = 13.14 SUBAREA RUNOFF(CFS) = 30.79 EFFECTIVE AREA(ACRES) = 48.42 AREA-AVERAGED Fm(INCH/HR) = 0.20 AREA-AVERAGED Fp(INCH/HR) = 0.23 AREA-AVERAGED Ap = 0.86 TOTAL AREA(ACRES) = 48.9 PEAK FLOW RATE(CFS) = 112.69
**************************************************************************** FLOW PROCESS FROM NODE 331.00 TO NODE 331.00 IS CODE = 11 ---------------------------------------------------------------------------- >>>>>CONFLUENCE MEMORY BANK # 1 WITH THE MAIN-STREAM MEMORY<<<<< ============================================================================ ** MAIN STREAM CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 111.61 10.72 3.133 0.23( 0.20) 0.86 42.2 370.00
2 112.69 13.21 2.783 0.23( 0.20) 0.86 48.4 360.00
3 112.07 13.51 2.748 0.23( 0.20) 0.86 48.8 381.00
4 109.86 14.01 2.692 0.23( 0.20) 0.86 48.9 390.00
LONGEST FLOWPATH FROM NODE 360.00 TO NODE 331.00 = 2960.00 FEET. ** MEMORY BANK # 1 CONFLUENCE DATA **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 128.84 14.59 2.631 0.24( 0.22) 0.90 58.9 315.00
2 126.74 15.47 2.546 0.24( 0.22) 0.90 60.1 300.00
3 119.13 18.98 2.267 0.24( 0.22) 0.90 64.1 340.00
LONGEST FLOWPATH FROM NODE 300.00 TO NODE 331.00 = 4066.00 FEET. ** PEAK FLOW RATE TABLE **
STREAM Q Tc Intensity Fp(Fm) Ap Ae HEADWATER
NUMBER (CFS) (MIN.) (INCH/HR) (INCH/HR) (ACRES) NODE
1 225.95 10.72 3.133 0.24( 0.21) 0.88 85.5 370.00
2 236.70 13.21 2.783 0.24( 0.21) 0.88 101.8 360.00
3 237.16 13.51 2.748 0.24( 0.21) 0.88 103.4 381.00
4 236.73 14.01 2.692 0.24( 0.21) 0.88 105.5 390.00
5 236.03 14.59 2.631 0.24( 0.21) 0.88 107.9 315.00
6 230.16 15.47 2.546 0.24( 0.21) 0.88 109.0 300.00
7 210.29 18.98 2.267 0.24( 0.21) 0.88 113.1 340.00
TOTAL AREA(ACRES) = 113.1
COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS:
PEAK FLOW RATE(CFS) = 237.16 Tc(MIN.) = 13.510
EFFECTIVE AREA(ACRES) = 103.38 AREA-AVERAGED Fm(INCH/HR) = 0.21 AREA-AVERAGED Fp(INCH/HR) = 0.24 AREA-AVERAGED Ap = 0.88 TOTAL AREA(ACRES) = 113.1
LONGEST FLOWPATH FROM NODE 300.00 TO NODE 331.00 = 4066.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 331.00 TO NODE 331.00 IS CODE = 12 ---------------------------------------------------------------------------- >>>>>CLEAR MEMORY BANK # 1 <<<<<
============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 331.00 TO NODE 335.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 435.08 DOWNSTREAM(FEET) = 433.92 FLOW LENGTH(FEET) = 558.00 MANNING'S N = 0.013
DEPTH OF FLOW IN 81.0 INCH PIPE IS 62.8 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 7.97
ESTIMATED PIPE DIAMETER(INCH) = 81.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 237.16
PIPE TRAVEL TIME(MIN.) = 1.17 Tc(MIN.) = 14.68
LONGEST FLOWPATH FROM NODE 300.00 TO NODE 335.00 = 4624.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 335.00 TO NODE 470.00 IS CODE = 31 ---------------------------------------------------------------------------- >>>>>COMPUTE PIPE-FLOW TRAVEL TIME THRU SUBAREA<<<<<
>>>>>USING COMPUTER-ESTIMATED PIPESIZE (NON-PRESSURE FLOW)<<<<< ============================================================================ ELEVATION DATA: UPSTREAM(FEET) = 433.92 DOWNSTREAM(FEET) = 433.02 FLOW LENGTH(FEET) = 181.00 MANNING'S N = 0.013
DEPTH OF FLOW IN 69.0 INCH PIPE IS 53.0 INCHES
PIPE-FLOW VELOCITY(FEET/SEC.) = 11.07
ESTIMATED PIPE DIAMETER(INCH) = 69.00 NUMBER OF PIPES = 1 PIPE-FLOW(CFS) = 237.16
PIPE TRAVEL TIME(MIN.) = 0.27 Tc(MIN.) = 14.95
LONGEST FLOWPATH FROM NODE 300.00 TO NODE 470.00 = 4805.00 FEET. **************************************************************************** FLOW PROCESS FROM NODE 470.00 TO NODE 470.00 IS CODE = 10 ---------------------------------------------------------------------------- >>>>>MAIN-STREAM MEMORY COPIED ONTO MEMORY BANK # 1 <<<<< ============================================================================ **************************************************************************** FLOW PROCESS FROM NODE 400.00 TO NODE 401.00 IS CODE = 21 ---------------------------------------------------------------------------- >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<<
>>USE TIME-OF-CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< ============================================================================ INITIAL SUBAREA FLOW-LENGTH(FEET) = 317.00
ELEVATION DATA: UPSTREAM(FEET) = 867.54 DOWNSTREAM(FEET) = 751.33 Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20
SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 8.638
* 25 YEAR RAINFALL INTENSITY(INCH/HR) = 3.540
SUBAREA Tc AND LOSS RATE DATA(AMC II):