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193 <br />Manning's FRICTION FACTOR for Streetflow Section(curb-to-curb) = 0.0130 <br />194 <br />Manning's FRICTION FACTOR for Back -of -Walk Flow Section = 0.0200 <br />195 <br />196 <br />**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 2.48 <br />197 <br />STREETFLOW MODEL RESULTS USING ESTIMATED FLOW: <br />198 <br />STREET FLOW DEPTH(FEET) = 0.25 <br />199 <br />HALFSTREET FLOOD WIDTH(FEET) = 6.35 <br />200 <br />AVERAGE FLOW VELOCITY(FEET/SEC.) = 2.38 <br />201 <br />PRODUCT OF DEPTH&VELOCITY(FT*FT/SEC.) = 0.60 <br />202 <br />STREET FLOW TRAVEL TIME(MIN.) = 3.81 Tc(MIN.) = 8.81 <br />203 <br />* 100 YEAR RAINFALL INTENSITY(INCH/HR) = 4.472 <br />204 <br />SUBAREA LOSS RATE DATA(AMC II): <br />205 <br />DEVELOPMENT TYPE/ SCS SOIL AREA Fp Ap SCS <br />206 <br />LAND USE GROUP (ACRES) (INCH/HR) (DECIMAL) CN <br />207 <br />COMMERCIAL B 0.95 0.30 0.100 56 <br />208 <br />SUBAREA AVERAGE PERVIOUS LOSS RATE, Fp(INCH/HR) = 0.30 <br />209 <br />SUBAREA AVERAGE PERVIOUS AREA FRACTION, Ap = 0.100 <br />210 <br />SUBAREA AREA(ACRES) = 0.95 SUBAREA RUNOFF(CFS) = 3.80 <br />211 <br />EFFECTIVE AREA(ACRES) = 1.05 AREA -AVERAGED Fm(INCH/HR) = 0.03 <br />212 <br />AREA -AVERAGED Fp(INCH/HR) = 0.30 AREA -AVERAGED Ap = 0.10 <br />213 <br />TOTAL AREA(ACRES) = 1.0 PEAK FLOW RATE(CFS) = 4.20 <br />214 <br />215 <br />END OF SUBAREA STREET FLOW HYDRAULICS: <br />216 <br />DEPTH(FEET) = 0.29 HALFSTREET FLOOD WIDTH(FEET) = 8.22 <br />217 <br />FLOW VELOCITY(FEET/SEC.) = 2.64 DEPTH*VELOCITY(FT*FT/SEC.) = 0.77 <br />218 <br />LONGEST FLOWPATH FROM NODE 540.00 TO NODE 542.00 = 559.00 <br />FEET. <br />219 <br />_______________________________________________________________ <br />220 <br />END OF STUDY SUMMARY: <br />221 <br />TOTAL AREA(ACRES) = 1.0 TC(MIN.) = 8.81 <br />222 <br />EFFECTIVE AREA(ACRES) = 1.05 AREA -AVERAGED Fm(INCH/HR)= 0.03 <br />223 <br />AREA -AVERAGED Fp(INCH/HR) = 0.30 AREA -AVERAGED Ap = 0.100 <br />224 <br />PEAK FLOW RATE(CFS) = 4.20 <br />225 <br />_______________________________________________________________ <br />226 <br />___________________________________________________________________________ <br />227 <br />END OF RATIONAL METHOD ANALYSIS <br />228 <br />229 <br />230 <br />231 <br />