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............................................................................ <br />FLOW PROCESS FROM NODE 210.00 TO NODE 210.00 IS CODE = <br />82 <br />»»>ADD SUBAREA RUNOFF TO MAINLINE, AT MAINLINE Tc, ««< <br />»»>(AND COMPUTE INITIAL SUBAREA RUNOFF) ««< <br />INITIAL SUBAREA FLOW-LENGTH(FEET) = 206.00 <br />ELEVATION DATA: UPSTREAM(FEET) = 183.00 DOWNSTREAM(FEET) = <br />175.00 <br />Tc - K*[(LENGTH" 3.00)/(ELEVATION CHANGE)]"0.20 <br />SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 5.000 <br />* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 6.187 <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 2.30 0.30 0.100 <br />56 5.00 <br />SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.30 <br />SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100 <br />SUBAREA AREA(ACRES) = 2.30 INITIAL SUBAREA RUNOFF(CFS) = <br />12.75 <br />" ADD SUBAREA RUNOFF TO MAINLINE AT MAINLINE Tc: <br />MAINLINE Tc(MIN.) = 6.87 <br />* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 5.159 <br />SUBAREA AREA(ACRES) = 2.30 SUBAREA RUNOFF(CFS) = 10.62 <br />EFFECTIVE AREA(ACRES) = 4.18 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) = 4.2 PEAK FLOW RATE(CFS) = <br />19.30 <br />a aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa <br />FLOW PROCESS FROM NODE 210.00 TO NODE 240.00 IS CODE = <br />91 <br />»»>COMPUTE PIPE -FLOW TRAVEL TIME THRU SUBAREA««< <br />»»>USING USER -SPECIFIED PIPESIZE (EXISTING ELEMENT) ««< <br />ELEVATION DATA: UPSTREAM(FEET) = 141.50 DOWNSTREAM(FEET) = 137.50 <br />FLOW LENGTH(FEET) = 630.00 MANNING'S N = 0.013 <br />ASSUME FULL -FLOWING PIPELINE <br />PIPE -FLOW VELOCITY(FEET/SEC.) = 6.14 <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) - 19.30 <br />PIPE TRAVEL TIME(MIN.) = 1.71 Tc(MIN.) = 8.58 <br />LONGEST FLOWPATH FROM NODE 200.00 TO NODE 240.00 = 1181.00 FEET <br />a aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa <br />FLOW PROCESS FROM NODE 240.00 TO NODE 240.00 IS CODE = 1 <br />»»>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE««< <br />TOTAL NUMBER OF STREAMS = 3 <br />CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 1 ARE: <br />TIME OF CONCENTRATION(MIN.) - 8.58 <br />RAINFALL INTENSITY(INCH/HR) = 4.54 <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 - 19.30 <br />+ + <br />OF-Bl <br />---------------------------------------------------------------------------- <br />a aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa <br />FLOW PROCESS FROM NODE 220.00 TO NODE 221.00 IS CODE = 21 <br />»»>RATIONAL METHOD INITIAL SUBAREA ANALYSIS««< <br />»USE TIME -OF -CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< <br />3 <br />