Laserfiche WebLink
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 240.00 TO NODE 260.00 = 1022.00 FEET <br />a aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa <br />FLOW PROCESS FROM NODE 260.00 TO NODE 260.00 IS CODE = 1 <br />»»>DESIGNATE INDEPENDENT STREAM FOR CONFLUENCE««< <br />TOTAL NUMBER OF STREAMS = 9 <br />CONFLUENCE VALUES USED FOR INDEPENDENT STREAM 3 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 />+ <br />+ <br />OF-B2 <br />---------------------------------------------------------------------------- <br />a aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa <br />FLOW PROCESS FROM NODE 230.00 TO NODE 231.00 IS CODE = <br />21 <br />»»>RATIONAL METHOD INITIAL SUBAREA ANALYSIS««< <br />»USE TIME -OF -CONCENTRATION NOMOGRAPH FOR INITIAL SUBAREA<< <br />INITIAL SUBAREA FLOW-LENGTH(FEET) = 22.00 <br />ELEVATION DATA: UPSTREAM(FEET) = 156.00 DOWNSTREAM(FEET) = <br />152.40 <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 0.10 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 RUNOFF(CFS) - 0.55 <br />TOTAL AREA(ACRES) - 0.10 PEAK FLOW RATE(CFS) - 0.55 <br />a aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa <br />FLOW PROCESS FROM NODE 231.00 TO NODE 260.00 IS CODE = <br />61 <br />»»>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA««< <br />»»>(STANDARD CURB SECTION USED) ««< <br />---------------------------------------------------------------------------- <br />UPSTREAM ELEVATION(FEET) = 152.40 DOWNSTREAM ELEVATION(FEET) <br />= 142.70 <br />STREET LENGTH(FEET) = 978.00 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 = 1 <br />STREET PARKWAY CROSSFALL(DECIMAL) = 0.020 <br />Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) <br />= 0.0130 <br />Manning's FRICTION FACTOR for Back -of -Walk Flow Section = 0.0200 <br />6 <br />