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»»>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE««< <br /> >>>>>AND COMPUTE VARIOUS CONFLUENCED STREAM VALUES««< <br /> - ------------ - <br /> TOTAL NUMBER OF STREAMS = 2 <br /> CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 2 ARE: <br /> TIME OF CONCENTRATION(MIN. ) = 21.08 <br /> RAINFALL INTENSITY(INCH/HR) = 2.41 <br /> AVERAGED Fm(INCH/HR) = .05 <br /> EFFECTIVE STREAM AREA(ACRES) = 48.76 <br /> TOTAL STREAM AREA(ACRES) = 48.76 <br /> PEAK FLOW RATE(CFS) AT CONFLUENCE = 103.44 <br /> RAINFALL INTENSITY AND TIME OF CONCENTRATION RATIO <br /> CONFLUENCE FORMULA USED FOR 2 STREAMS. <br /> ** PEAK FLOW RATE TABLE ** <br /> Q(CFS) TO MIN. ) Fm(INCH/HR) Ae(ACRES) <br /> 1 377. 18 25.41 .064 203.16 <br /> 2 356.01 28.18 .065 210.10 <br /> 3 372. 99 21.08 .063 176.81 <br /> COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS: <br /> PEAK FLOW RATE(CFS) = 377.18 Tc(MIN. ) = 25.413 <br /> EFFECTIVE AREA(ACRES) = 203.16 AVERAGED Fm(INCH/HR) _ .06 <br /> TOTAL AREA(ACRES) = 210.10 <br /> **************************************************************************** <br /> FLOW PROCESS FROM NODE 2.00 TO NODE 2.01 IS CODE = 2 <br /> ---------------------------------------------------------------------------- <br /> >>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS««< <br /> NATURAL AVERAGE COVER <br /> TC = K* [ (LENGTH** 3.00) / (ELEVATION CHANGE) ] ** .20 <br /> INITIAL SUBAREA FLOW-LENGTH(FEET) = 580.00 <br /> UPSTREAM ELEVATION(FEET) = 135.00 <br /> DOWNSTREAM ELEVATION(FEET) = 40.00 <br /> ELEVATION DIFFERENCE(FEET) = 95.00 <br /> TC(MIN. ) = .706*[ ( 580.00** 3.00) / ( 95.00) ]** .20 = 12. 922 <br /> 1000 YEAR RAINFALL INTENSITY(INCH/HR) = 3.124 <br /> *USER SPECIFIED(SUBAREA) : <br /> NATURAL OR AGRICULTURE SUBAREA LOSS RATE, Fm(INCH/HR) _ .0500 <br /> SUBAREA RUNOFF(CFS) = 19.26 <br /> TOTAL AREA(ACRES) = 6.96 PEAK FLOW RATE(CFS) = 19.26 <br /> **************************************************************************** <br /> FLOW PROCESS FROM NODE 2.01 TO NODE 2.02 IS CODE = 9 <br /> ---------------------------------------------------------------------------- <br /> >>>>>COMPUTE "V" GUTTER FLOW TRAVEL TIME THRU SUBAREA<<<<< <br /> UPSTREAM NODE ELEVATION(FEET) = 40.00 <br /> DOWNSTREAM NODE ELEVATION(FEET) = 39.00 <br /> CHANNEL LENGTH THRU SUBAREA(FEET) = 720.00 <br /> "V" GUTTER WIDTH(FEET) = .00 GUTTER HIKE(FEET) _ .001 <br /> PAVEMENT LIP(FEET) = .001 MANNING°S N = .0150 <br /> PAVEMENT CROSSFALL(DECIMAL NOTATION) _ .50000 <br /> MAXIMUM DEPTH(FEET) = 5.00 <br /> 1000 YEAR RAINFALL INTENSITY(INCH/HR) = 2.728 <br /> *USER SPECIFIED(SUBAREA) : <br /> NATURAL OR AGRICULTURE SUBAREA LOSS RATE, Fm(INCH/HR) = .0500 <br />