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MPB2.OUT <br />+ + <br />OF-B2 <br />**************************************************************************** <br />FLOW PROCESS FROM NODE 230.00 TO NODE 231.00 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) = 156.00 DOWNSTREAM(FEET) = 152.40 <br />Tc = K*[(LENGTH** 3.00)/(ELEVATION CHANGE)]**0.20 <br />SUBAREA ANALYSIS USED MINIMUM Tc(MIN.) = <br />5.000 <br />* 2 YEAR RAINFALL <br />INTENSITY(INCH/HR) = <br />2.264 <br />SUBAREA Tc AND LOSS <br />RATE DATA(AMC II): <br />DEVELOPMENT TYPE/ <br />SCS SOIL AREA <br />Fp <br />Ap SCS <br />Tc <br />LAND USE <br />GROUP (ACRES) <br />(INCH/HR) <br />(DECIMAL) CN <br />(MIN.) <br />COMMERCIAL <br />B 0.10 <br />0.30 <br />0.100 56 <br />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) = 0.20 <br />TOTAL AREA(ACRES) = 0.10 PEAK FLOW RATE(CFS) = 0.20 <br />**************************************************************************** <br />FLOW PROCESS FROM NODE 231.00 TO NODE 260.00 IS CODE = 61 <br />---------------------------------------------------------------------------- <br />>>>>>COMPUTE STREET FLOW TRAVEL TIME THRU SUBAREA<<<<< <br />>>>>>(STANDARD CURB SECTION USED)<<<<< <br />---------------------------------------------------------------------------- <br />--------- <br />UPSTREAM ELEVATION(FEET) = 152.40 DOWNSTREAM ELEVATION(FEET) = 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) = 0.0130 <br />Manning's FRICTION FACTOR for Back -of -Walk Flow Section = 0.0200 <br />**TRAVEL TIME COMPUTED USING ESTIMATED FLOW(CFS) = 0.93 <br />STREETFLOW MODEL RESULTS USING ESTIMATED FLOW: <br />STREET FLOW DEPTH(FEET) = 0.24 <br />Page 9 <br />