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MPB2.OUT <br />FLOW LENGTH(FEET) = 654.00 MANNING'S N = 0.013 <br />DEPTH OF FLOW IN 24.0 INCH PIPE IS 12.0 INCHES <br />PIPE -FLOW VELOCITY(FEET/SEC.) = 4.75 <br />GIVEN PIPE DIAMETER(INCH) = 24.00 NUMBER OF PIPES = 1 <br />PIPE-FLOW(CFS) = 7.44 <br />PIPE TRAVEL TIME(MIN.) = 2.30 Tc(MIN.) = 8.65 <br />LONGEST FLOWPATH FROM NODE 200.00 TO NODE 260.00 = 941.00 FEET. <br />**************************************************************************** <br />FLOW PROCESS FROM NODE 260.00 TO NODE 260.00 IS CODE = 1 <br />---------------------------------------------------------------------------- <br />>>>>>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE« <<< <br />---------------------------------------------------------------------------- <br />TOTAL NUMBER OF STREAMS = 4 <br />CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 1 ARE: <br />TIME OF CONCENTRATION(MIN.) = 8.65 <br />RAINFALL INTENSITY(INCH/HR) = 1.65 <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) = 4.18 <br />TOTAL STREAM AREA(ACRES) = 4.18 <br />PEAK FLOW RATE(CFS) AT CONFLUENCE = 7.44 <br />+ + <br />DA-B1 <br />**************************************************************************** <br />FLOW PROCESS FROM NODE 220.00 TO NODE 221.00 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) 200.00 <br />ELEVATION DATA: UPSTREAM(FEET) = 157.00 DOWNSTREAM(FEET) = 155.00 <br />Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20 <br />SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = <br />7.027 <br />* 2 YEAR RAINFALL <br />INTENSITY(INCH/HR) = <br />1.862 <br />SUBAREA Tc AND LOSS <br />RATE DATA(AMC II): <br />DEVELOPMENT TYPE/ <br />SCS SOIL AREA <br />Fp Ap SCS <br />Tc <br />LAND USE <br />GROUP (ACRES) <br />(INCH/HR) (DECIMAL) CN <br />(MIN.) <br />MOBILE HOME PARK <br />B 1.00 <br />0.30 0.250 56 <br />7.03 <br />SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) <br />= 0.30 <br />SUBAREA AVERAGE PERVIOUS AREA FRACTION, <br />Ap = 0.250 <br />SUBAREA RUNOFF(CFS) <br />= 1.61 <br />Page 5 <br />