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MEA2.OUT <br />FLOW PROCESS FROM NODE 140.00 TO NODE 141.00 IS CODE = 21 <br />---------------------------------------------------------------------------- <br />>>>>>RATIONAL METHOD INITIAL SUBAREA ANALYSIS<<<<< <br />>>USE TIME -OF -CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< <br />---------------------------------------------------------------------------- <br />INITIAL SUBAREA FLOW-LENGTH(FEET) 266.00 <br />ELEVATION DATA: UPSTREAM(FEET) = 155.20 DOWNSTREAM(FEET) = 148.30 <br />Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20 <br />SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = <br />5.889 <br />* 2 YEAR RAINFALL <br />INTENSITY(INCH/HR) = <br />2.061 <br />SUBAREA Tc AND LOSS <br />RATE DATA(AMC II): <br />DEVELOPMENT TYPE/ <br />SCS SOIL AREA <br />Fp <br />Ap SCS <br />Tc <br />LAND USE <br />GROUP (ACRES) <br />(INCH/HR) <br />(DECIMAL) CN <br />(MIN.) <br />COMMERCIAL <br />B 3.54 <br />0.30 <br />0.100 56 <br />5.89 <br />SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.30 <br />SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100 <br />SUBAREA RUNOFF(CFS) = 6.47 <br />TOTAL AREA(ACRES) = 3.54 PEAK FLOW RATE(CFS) = 6.47 <br />**************************************************************************** <br />FLOW PROCESS FROM NODE 141.00 TO NODE 160.00 IS CODE = 41 <br />>>>>>COMPUTE PIPE -FLOW TRAVEL TIME THRU SUBAREA<<<<< <br />>>>>>USING USER -SPECIFIED PIPESIZE (EXISTING ELEMENT)<<<<< <br />---------------------------------------------------------------------------- <br />----------------------------------------- <br />ELEVATION DATA: UPSTREAM(FEET) = 142.00 DOWNSTREAM(FEET) = 137.20 <br />FLOW LENGTH(FEET) = 809.00 MANNING'S N = 0.013 <br />DEPTH OF FLOW IN 24.0 INCH PIPE IS 10.3 INCHES <br />PIPE -FLOW VELOCITY(FEET/SEC.) = 5.04 <br />GIVEN PIPE DIAMETER(INCH) = 24.00 NUMBER OF PIPES = 1 <br />PIPE-FLOW(CFS) = 6.47 <br />PIPE TRAVEL TIME(MIN.) = 2.68 Tc(MIN.) = 8.56 <br />LONGEST FLOWPATH FROM NODE 140.00 TO NODE 160.00 = 1075.00 FEET. <br />**************************************************************************** <br />FLOW PROCESS FROM NODE 160.00 TO NODE 160.00 IS CODE = 1 <br />---------------------------------------------------------------------------- <br />>>>>>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.) = 8.56 <br />RAINFALL INTENSITY(INCH/HR) = 1.66 <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) = 3.54 <br />Page 12 <br />