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MPC2.OUT <br />COMPUTED CONFLUENCE ESTIMATES ARE AS FOLLOWS: <br />PEAK FLOW RATE(CFS) = 14.80 Tc(MIN.) = 7.63 <br />EFFECTIVE AREA(ACRES) = 8.95 AREA -AVERAGED Fm(INCH/HR) = 0.03 <br />AREA -AVERAGED Fp(INCH/HR) = 0.30 AREA -AVERAGED Ap = 0.10 <br />TOTAL AREA(ACRES) = 8.9 <br />LONGEST FLOWPATH FROM NODE 300.00 TO NODE 340.00 = 701.00 FEET. <br />**************************************************************************** <br />FLOW PROCESS FROM NODE 340.00 TO NODE 350.00 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) = 145.30 DOWNSTREAM(FEET) = 145.00 <br />FLOW LENGTH(FEET) = 70.00 MANNING'S N = 0.013 <br />ASSUME FULL -FLOWING PIPELINE <br />PIPE -FLOW VELOCITY(FEET/SEC.) = 4.71 <br />PIPE FLOW VELOCITY = (TOTAL FLOW)/(PIPE CROSS SECTION AREA) <br />GIVEN PIPE DIAMETER(INCH) = 24.00 NUMBER OF PIPES = 1 <br />PIPE-FLOW(CFS) = 14.80 <br />PIPE TRAVEL TIME(MIN.) = 0.25 Tc(MIN.) = 7.88 <br />LONGEST FLOWPATH FROM NODE 300.00 TO NODE 350.00 = 771.00 FEET. <br />+ + <br />DA-05 <br />**************************************************************************** <br />FLOW PROCESS FROM NODE 350.00 TO NODE 350.00 IS CODE = 82 <br />---------------------------------------------------------------------------- <br />>>>>>ADD SUBAREA RUNOFF TO MAINLINE, AT MAINLINE Tc,<<<<< <br />>>>>>(AND COMPUTE INITIAL SUBAREA RUNOFF)<<<<< <br />---------------------------------------------------------------------------- <br />INITIAL SUBAREA FLOW-LENGTH(FEET) 100.00 <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.) = 5.000 <br />* 2 YEAR RAINFALL INTENSITY(INCH/HR) = 2.264 <br />SUBAREA Tc AND LOSS RATE DATA(AMC II): <br />DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap <br />LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) <br />COMMERCIAL B 3.53 0.30 0.100 <br />SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.30 <br />SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100 <br />SUBAREA AREA(ACRES) = 3.53 INITIAL SUBAREA RUNOFF(CFS) _ <br />Page 7 <br />SCS Tc <br />CN (MIN.) <br />56 5.00 <br />7.10 <br />