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INITIAL SUBAREA FLOW-LENGTH(FEET) = 22.00 <br />ELEVATION DATA: UPSTREAM(FEET) = 148.50 DOWNSTREAM(FEET) = 147.50 <br />To = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20 <br />SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = <br />5.000 <br />* 100 YEAR RAINFALL INTENSITY(INCH/HR) <br />= <br />6.187 <br />SUBAREA To AND LOSS RATE <br />DATA(AMC II): <br />DEVELOPMENT TYPE/ <br />SCS SOIL AREA <br />Fp <br />Ap SCS <br />To <br />LAND USE <br />GROUP (ACRES) <br />(INCH/HR) <br />(DECIMAL) CN <br />(MIN.) <br />COMMERCIAL <br />B 0.05 <br />0.30 <br />0.100 56 <br />5.00 <br />SUBAREA AVERAGE PERVIOUS <br />LOSS RATE, Fp(INCH/HR) <br />= 0.30 <br />SUBAREA AVERAGE PERVIOUS <br />AREA FRACTION, Ap <br />= 0.100 <br />SUBAREA RUNOFF(CFS) = <br />0.28 <br />TOTAL AREA(ACRES) = <br />0.05 PEAK FLOW <br />RATE(CFS) <br />= 0.28 <br />++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ <br />FLOW PROCESS FROM NODE 421.00 TO NODE 440.00 IS CODE = 61 <br />---------------------------------------------------------------------------- <br />»»>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA««< <br />»»>(STANDARD CURB SECTION USED) ««< <br />UPSTREAM ELEVATION(FEET) = 147.50 DOWNSTREAM ELEVATION(FEET) = 144.70 <br />STREET LENGTH(FEET) = 345.00 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) = 1.35 <br />STREETFLOW MODEL RESULTS USING ESTIMATED FLOW: <br />STREET FLOW DEPTH(FEET) = 0.23 <br />HALFSTREET FLOOD WIDTH(FEET) = 5.17 <br />AVERAGE FLOW VELOCITY(FEET/SEC.) = 1.74 <br />PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 0.40 <br />STREET FLOW TRAVEL TIME(MIN.) = 3.30 Tc(MIN.) = 8.30 <br />* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.628 <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 0.51 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) = 0.51 SUBAREA RUNOFF(CFS) = 2.11 <br />EFFECTIVE AREA(ACRES) = 0.56 AREA -AVERAGED Fm(INCH/HR) = 0.03 <br />AREA -AVERAGED Fp(INCH/HR) = 0.30 AREA -AVERAGED Ap = 0.10 <br />TOTAL AREA(ACRES) = 0.6 PEAK FLOW RATE(CFS) = 2.32 <br />END OF SUBAREA STREET FLOW HYDRAULICS: <br />DEPTH(FEET) = 0.26 HALFSTREET FLOOD WIDTH(FEET) = 6.88 <br />FLOW VELOCITY(FEET/SEC.) = 1.96 DEPTH*VELOCITY(FT*FT/SEC.) = 0.52 <br />LONGEST FLOWPATH FROM NODE 420.00 TO NODE 440.00 = 367.00 FEET. <br />++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ <br />FLOW PROCESS FROM NODE 440.00 TO NODE 440.00 IS CODE = 1 <br />---------------------------------------------------------------------------- <br />»»>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE««< <br />