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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 0.10 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) - 0.55 <br />TOTAL AREA(ACRES) - 0.10 PEAK FLOW RATE(CFS) - 0.55 <br />a aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa <br />FLOW PROCESS FROM NODE 221.00 TO NODE 240.00 IS CODE = 61 <br />»»>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA««< <br />»»>(STANDARD CURB SECTION USED) ««< <br />UPSTREAM ELEVATION(FEET) = 146.60 DOWNSTREAM ELEVATION(FEET) = 142.70 <br />STREET LENGTH(FEET) = 1000.00 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 />OUTSIDE STREET CROSSFALL(DECIMAL) = 0.020 <br />SPECIFIED NUMBER OF HALFSTREETS CARRYING RUNOFF = 2 <br />STREET PARKWAY CROSSFALL(DECIMAL) = 0.020 <br />Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) - 0.0130 <br />Manning's FRICTION FACTOR for Back -of -Walk Flow Section = 0.0200 <br />"TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 2.32 <br />STREETFLOW MODEL RESULTS USING ESTIMATED FLOW: <br />STREET FLOW DEPTH(FEET) = 0.29 <br />HALFSTREET FLOOD WIDTH(FEET) = 8.22 <br />AVERAGE FLOW VELOCITY(FEET/SEC.) = 1.46 <br />PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) - 0.43 <br />STREET FLOW TRAVEL TIME(MIN.) = 11.39 Tc(MIN.) = 16.39 <br />* 100 YEAR RAINFALL INTENSITY(INCH/HR) - 3.133 <br />SUBAREA LOSS RATE DATA(AMC II): <br />DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS <br />LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN <br />COMMERCIAL B 1.21 0.30 0.100 56 <br />SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.30 <br />SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100 <br />SUBAREA AREA(ACRES) - 1.21 SUBAREA RUNOFF(CFS) - 3.38 <br />EFFECTIVE AREA(ACRES) - 1.31 AREA -AVERAGED Fm(INCH/HR) - 0.03 <br />AREA -AVERAGED Fp(INCH/HR) = 0.30 AREA -AVERAGED Ap = 0.10 <br />TOTAL AREA(ACRES) - 1.3 PEAK FLOW RATE(CFS) - 3.66 <br />END OF SUBAREA STREET FLOW HYDRAULICS: <br />DEPTH(FEET) = 0.33 HALFSTREET FLOOD WIDTH(FEET) = 10.07 <br />FLOW VELOCITY(FEET/SEC.) - 1.62 DEPTH*VELOCITY(FT*FT/SEC.) - 0.53 <br />LONGEST FLOWPATH FROM NODE 220.00 TO NODE 240.00 = 1022.00 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 2 ARE: <br />TIME OF CONCENTRATION(MIN.) - 16.39 <br />RAINFALL INTENSITY(INCH/HR) - 3.13 <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) - 1.31 <br />TOTAL STREAM AREA(ACRES) = 1.31 <br />PEAK FLOW RATE(CFS) AT CONFLUENCE - 3.66 <br />FAI <br />