Laserfiche WebLink
EFFECTIVE STREAM AREA(ACRES) = 45.44 <br />TOTAL STREAM AREA(ACRES) = 45.44 <br />PEAK FLOW RATE(CFS) AT CONFLUENCE = 90.75 <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.) <br />1 273.26 28.05 <br />2 278.34 25.32 <br />Fm(INCH/HR) Ae(ACRES) <br />.050 156.30 <br />.050 145.51 <br />COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS: <br />PEAK FLOW RATE(CFS) = 278.34 Tc(MIN.) = 25.317 <br />EFFECTIVE AREA(ACRES) = 145.51 AVERAGED Fm(INCH/HR) _ .05 <br />TOTAL AREA(ACRES) = 156.30 <br />**************************************************************************** <br />FLOW PROCESS FROM NODE 3.00 TO NODE 3.01 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) = 350.00 <br />UPSTREAM ELEVATION(FEET) = 120.00 <br />DOWNSTREAM ELEVATION(FEET) = 110.00 <br />ELEVATION DIFFERENCE(FEET) = 10.00 <br />TC(MIN.) _ .706*[( 350.00** 3.00)/( 10.00)]** .20 = 14.971 <br />AMNLI 1000 YEAR RAINFALL-INTENSITY(INCHAiR) - 2.805 <br />*USER SPECIFIED(SUBAREA): <br />NATURAL OR AGRICULTURE SUBAREA LOSS RATE, Fm(INCH/HR) _ .0100 <br />SUBAREA RUNOFF(CFS) = 7.12 <br />TOTAL AREA(ACRES) = 2.83 PEAK FLOW RATE(CFS) = 7.12 <br />**************************************************************************** <br />FLOW PROCESS FROM NODE 3.O1 -TO NODE 3_02 IS CODE = 3 <br />---------------------------------------------------------------------------- <br />»»>COMPUTE PIPE -FLOW TRAVEL TIME THRU SUBAREA««< <br />»»>USI`NG COMPUTER -ESTIMATED PIPESIZ'E (NON -PRESSURE FLOW) ««< <br />ESTIMATED PIPE DIAMETER(INCH) INCREASED TO 18.000 <br />DEPTH OF FLOW IN 18.0 INCH PIPE IS 4.6 INCHES <br />PIPE -FLOW VELOCITY(FEET/SEC.) = 20.2 <br />UPSTREAM NODE ELEVATION(FEET) = 110.00 <br />DOWNSTREAM NODE ELEVATION(FEET) = 38.00 <br />FLOW LENGTH(FEET) = 280.00 MANNING'S N = .013 <br />ESTIMATED PIPE DIAMETER(INCH) = 18.00 NUMBER OF PIPES = 1 <br />PIPE-FLOW(CFS) = 7.12 <br />TRAVEL TIME(MIN.) _ .23 TC(MIN.) = 15.20 <br />**************************************************************************** <br />FLOW PROCESS FROM NODE 3.01 TO NODE 3.02 IS CODE = 8 <br />---------------------------------------------------------------------------- <br />»»>ADDITION OF SUBAREA TO MAINLINE PEAK FLOW««< <br />1000 YEAR RAINFALL INTENSITY(INCH/HR) = 2.787 <br />*USER SPECIFIED(SUBAREA): <br />