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MEC2.OUT <br />**************************************************************************** <br />FLOW PROCESS FROM NODE 350.00 TO NODE 350.00 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) 173.00 <br />ELEVATION DATA: UPSTREAM(FEET) = 156.60 DOWNSTREAM(FEET) = 153.00 <br />Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20 <br />SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = 5.181 <br />* 2 YEAR RAINFALL INTENSITY(INCH/HR) = 2.218 <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 3.17 0.30 0.100 <br />56 5.18 <br />SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.30 <br />SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100 <br />SUBAREA AREA(ACRES) = 3.17 INITIAL SUBAREA RUNOFF(CFS) = <br />6.24 <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) = 3.17 SUBAREA RUNOFF(CFS) = 5.28 <br />EFFECTIVE AREA(ACRES) = 10.87 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) = 10.9 PEAK FLOW RATE(CFS) = <br />18.10 <br />**************************************************************************** <br />FLOW PROCESS FROM NODE 370.00 TO NODE 370.00 IS CODE = 1 <br />---------------------------------------------------------------------------- <br />>>>>>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE« <<< <br />----------------------------------------------------- <br />TOTAL NUMBER OF STREAMS = 2 <br />CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 1 ARE: <br />TIME OF CONCENTRATION(MIN.) <br />= 6.91 <br />RAINFALL INTENSITY(INCH/HR) <br />= 1.88 <br />AREA -AVERAGED Fm(INCH/HR) = <br />0.03 <br />AREA -AVERAGED Fp(INCH/HR) = <br />0.30 <br />AREA -AVERAGED Ap = 0.10 <br />EFFECTIVE STREAM AREA(ACRES) <br />= 10.87 <br />TOTAL STREAM AREA(ACRES) = <br />10.87 <br />PEAK FLOW RATE(CFS) AT CONFLUENCE = 18.10 <br />FLOW PROCESS FROM NODE 360.00 TO NODE 361.00 IS CODE = 21 <br />Page 6 <br />