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* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 3.587 <br />SUBAREA LOSS RATE DATA(AMC II): <br />DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS <br />LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN <br />COMMERCIAL B 0.72 0.30 0.100 56 <br />SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.30 <br />SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100 <br />SUBAREA AREA(ACRES) = 0.72 SUBAREA RUNOFF(CFS) = 2.31 <br />EFFECTIVE AREA(ACRES) = 0.77 AREA -AVERAGED Fm(INCH/HR) = 0.03 <br />AREA -AVERAGED Fp(INCH/HR) = 0.30 AREA -AVERAGED Ap = 0.10 <br />TOTAL AREA(ACRES) = 0.8 PEAK FLOW RATE(CFS) = 2.47 <br />END OF SUBAREA STREET FLOW HYDRAULICS: <br />DEPTH(FEET) = 0.30 HALFSTREET FLOOD WIDTH(FEET) = 8.81 <br />FLOW VELOCITY(FEET/SEC.) = 1.38 DEPTH*VELOCITY(FT*FT/SEC.) = 0.42 <br />LONGEST FLOWPATH FROM NODE 430.00 TO NODE 440.00 = 612.00 FEET. <br />++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ <br />FLOW PROCESS FROM NODE 440.00 TO NODE 440.00 IS CODE = 1 <br />---------------------------------------------------------------------------- <br />»»>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE««< <br />»»>AND COMPUTE VARIOUS CONFLUENCED STREAM VALUES««< <br />TOTAL NUMBER OF STREAMS = 4 <br />CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 4 ARE: <br />TIME OF CONCENTRATION(MIN.) = 12.95 <br />RAINFALL INTENSITY(INCH/HR) = 3.59 <br />AREA -AVERAGED Fm(INCH/HR) = 0.03 <br />AREA -AVERAGED Fp(INCH/HR) = 0.30 <br />AREA -AVERAGED Ap = 0.10 <br />EFFECTIVE STREAM AREA(ACRES) = 0.77 <br />TOTAL STREAM AREA(ACRES) = 0.77 <br />PEAK FLOW RATE(CFS) AT CONFLUENCE = 2.47 <br />** CONFLUENCE DATA <br />** <br />STREAM <br />Q <br />Tc <br />Intensity <br />Fp(Fm) <br />Ap <br />As <br />HEADWATER <br />NUMBER <br />(CFS) <br />(MIN.) <br />(INCH/HR) <br />(INCH/HR) <br />(ACRES) <br />NODE <br />1 <br />13.41 <br />6.80 <br />5.189 <br />0.30( 0.03) <br />0.10 <br />2.4 <br />400.00 <br />2 <br />11.75 <br />6.94 <br />5.128 <br />0.30( 0.03) <br />0.10 <br />2.1 <br />410.00 <br />3 <br />2.32 <br />8.30 <br />4.628 <br />0.30( 0.03) <br />0.10 <br />0.6 <br />420.00 <br />4 <br />2.47 <br />12.95 <br />3.587 <br />0.30( 0.03) <br />0.10 <br />0.8 <br />430.00 <br />RAINFALL INTENSITY AND TIME OF CONCENTRATION RATIO <br />CONFLUENCE FORMULA USED FOR 4 STREAMS. <br />** PEAK FLOW RATE TABLE ** <br />STREAM Q Tc <br />Intensity <br />Fp(Fm) <br />Ap As <br />HEADWATER <br />NUMBER (CFS) (MIN.) <br />(INCH/HR) <br />(INCH/HR) <br />(ACRES) <br />NODE <br />1 29.06 6.80 <br />5.189 <br />0.30( 0.03) <br />0.10 5.4 <br />400.00 <br />2 29.04 6.94 <br />5.128 <br />0.30( 0.03) <br />0.10 5.4 <br />410.00 <br />3 26.91 8.30 <br />4.628 <br />0.30( 0.03) <br />0.10 5.6 <br />420.00 <br />4 21.70 12.95 <br />3.587 <br />0.30( 0.03) <br />0.10 5.9 <br />430.00 <br />COMPUTED CONFLUENCE ESTIMATES <br />ARE AS FOLLOWS: <br />PEAK FLOW RATE(CFS) = <br />29.06 <br />Tc(MIN.) = <br />6.80 <br />EFFECTIVE AREA(ACRES) = <br />5.36 <br />AREA -AVERAGED <br />Fm(INCH/HR) <br />= <br />0.03 <br />AREA -AVERAGED Fp(INCH/HR) <br />= 0.30 <br />AREA -AVERAGED <br />Ap = 0.10 <br />TOTAL AREA(ACRES) = <br />5.9 <br />LONGEST FLOWPATH FROM NODE <br />410.00 <br />TO NODE <br />440.00 = <br />991.00 <br />FEET. <br />END OF STUDY SUMMARY: <br />TOTAL AREA(ACRES) = <br />5.9 <br />TC(MIN.) = <br />6.80 <br />EFFECTIVE AREA(ACRES) = <br />5.36 <br />AREA -AVERAGED <br />Fm(INCH/HR)= <br />0.03 <br />AREA -AVERAGED Fp(INCH/HR) <br />= 0.30 <br />AREA -AVERAGED <br />Ap = 0.100 <br />