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MED100.RES <br />CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 2 ARE: <br />TIME OF CONCENTRATION(MIN.) = 8.30 <br />RAINFALL INTENSITY(INCH/HR) = 4.63 <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) = 0.56 <br />TOTAL STREAM AREA(ACRES) = 0.56 <br />PEAK FLOW RATE(CFS) AT CONFLUENCE = 2.32 <br />+ + <br />OF-D2 <br />+ + <br />**************************************************************************** <br />FLOW PROCESS FROM NODE 420.00 TO NODE 421.00 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) 22.00 <br />ELEVATION DATA: UPSTREAM(FEET) = 147.20 DOWNSTREAM(FEET) = 146.60 <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 SCS Tc <br />LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN (MIN.) <br />COMMERCIAL B 0.05 0.30 0.100 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 RUNOFF(CFS) = 0.28 <br />TOTAL AREA(ACRES) = 0.05 PEAK FLOW RATE(CFS) = 0.28 <br />FLOW PROCESS FROM NODE 421.00 TO NODE 430.00 IS CODE = 61 <br />>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<< <br />>>>>>(STANDARD CURB SECTION USED)<<<<< <br />---------------------------------------------------------------------------- <br />--------- <br />UPSTREAM ELEVATION(FEET) = 146.60 DOWNSTREAM ELEVATION(FEET) = 144.70 <br />STREET LENGTH(FEET) = 590.00 CURB HEIGHT(INCHES) = 6.0 <br />STREET HALFWIDTH(FEET) = 22.00 <br />DISTANCE FROM CROWN TO CROSSFALL GRADEBREAK(FEET) = 11.00 <br />INSIDE STREET CROSSFALL(DECIMAL) = 0.020 <br />Page 6 <br />