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»» >DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE««< <br />»»>AND COMPUTE VARIOUS CONFLUENCED STREAM VALUES««< <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) Tc(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:.0.1"IS "CODE = 2 <br />---------------------------------------------------------------------------- <br />ANIAL <br />>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS«<« <br />NATURAL AVERAGE COVER <br />TC = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)I-- .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** .5._.,0,.0) / ( 95_,00,)1-* .20 = 12.922 <br />1000 YEAR RAINFALL INTENSITY(INCH/HR) = 3.124 <br />*USER SPECIFIED(SUBAREA): <br />NATURAL OR 'AGRICULTURE SUBAREA"LOSS RATE, Fmj"I-NCH/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 />