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MEC2.OUT <br />>>>>>USING USER -SPECIFIED PIPESIZE (EXISTING ELEMENT)<<<<< <br />---------------------------------------------------------------------------- <br />----------------------------------------- <br />ELEVATION DATA: UPSTREAM(FEET) = 146.50 DOWNSTREAM(FEET) = 145.40 <br />FLOW LENGTH(FEET) = 126.00 MANNING'S N = 0.013 <br />DEPTH OF FLOW IN 24.0 INCH PIPE IS 11.2 INCHES <br />PIPE -FLOW VELOCITY(FEET/SEC.) = 6.35 <br />GIVEN PIPE DIAMETER(INCH) = 24.00 NUMBER OF PIPES = 1 <br />PIPE-FLOW(CFS) = 9.08 <br />PIPE TRAVEL TIME(MIN.) = 0.33 Tc(MIN.) = 6.91 <br />LONGEST FLOWPATH FROM NODE 300.00 TO NODE 360.00 = 652.00 FEET. <br />+ + <br />EX-C4 <br />+ + <br />**************************************************************************** <br />FLOW PROCESS FROM NODE 340.00 TO NODE 340.00 IS CODE = 82 <br />>>>>>ADD SUBAREA RUNOFF TO MAINLINE, AT MAINLINE Tc,<<<<< <br />>>>>>(AND COMPUTE INITIAL SUBAREA RUNOFF)<<<<< <br />---------------------------------------------------------------------------- <br />INITIAL SUBAREA FLOW-LENGTH(FEET) 207.00 <br />ELEVATION DATA: UPSTREAM(FEET) = 154.30 DOWNSTREAM(FEET) = 152.00 <br />Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20 <br />SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 6.311 <br />* 2 YEAR RAINFALL INTENSITY(INCH/HR) = 1.980 <br />SUBAREA Tc AND LOSS RATE DATA(AMC II): <br />DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap <br />SCS Tc <br />LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) <br />CN (MIN.) <br />COMMERCIAL B 2.40 0.30 0.100 <br />56 6.31 <br />SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.30 <br />SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100 <br />SUBAREA AREA(ACRES) = 2.40 INITIAL SUBAREA RUNOFF(CFS) = <br />4.21 <br />** ADD SUBAREA RUNOFF TO MAINLINE AT MAINLINE Tc: <br />MAINLINE Tc(MIN.) = 6.91 <br />* 2 YEAR RAINFALL INTENSITY(INCH/HR) = 1.880 <br />SUBAREA AREA(ACRES) = 2.40 SUBAREA RUNOFF(CFS) = 4.00 <br />EFFECTIVE AREA(ACRES) = 7.70 AREA -AVERAGED Fm(INCH/HR) <br />= 0.03 <br />AREA -AVERAGED Fp(INCH/HR) = 0.30 AREA -AVERAGED Ap = 0.10 <br />TOTAL AREA(ACRES) = 7.7 PEAK FLOW RATE(CFS) = <br />12.82 <br />+ + <br />EX-05 <br />Page 5 <br />