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<br />Data for CENTERVILLE PROP DRAINAGE 10-24-00 <br />TYPE II 24-HOUR RAINFALL= 5.90 IN <br />Prepared by James R.Hill, Inc. <br />HvdroCAD 5.11 000744 (c) 1986-1999 Applied Microcomputer Systems <br /> <br />Page 2 <br /> <br />26 Oct 00 <br /> <br />SUB CATCHMENT 100 <br />PEAK= 13.04 CFS @ 12.09 HRS, VOLUME= 1. 00 AF <br />ACRES CN <br /> .89 98 IMPERVIOUS <br /> .44 98 OPEN WATER <br />2.55 61 GRASS <br />3.88 74 <br /> <br />Method <br />DIRECT ENTRY <br />TR-55 SHEET FLOW <br />Grass: Dense n=.24 <br /> <br />L=120' <br /> <br />SCS TR-20 METHOD <br />TYPE II 24-HOUR <br />RAINFALL= 5.90 IN <br />SPAN= 0-40 HRS, dt=.l HRS <br /> <br />Comment <br />ROOF TO <br />Segment <br />P2=2.7 in <br /> <br />Tc (min) <br />2.0 <br />18.0 <br /> <br />GROUND <br /> <br />ID: <br />s=.02 '/' <br /> <br />Total Length= 120 ft <br /> <br />Total Tc= <br /> <br />20.0 <br /> <br />SUBCATCHMENT 110 <br />PEAK= 40.14 CFS @ 12.04 HRS, VOLUME= 2.83 AF <br />ACRES CN <br />3.12 98 IMPERVIOUS <br />1.26 98 OPEN WATER <br />5.64 61 GRASS <br />10.02 77 <br /> <br />Method <br />DIRECT ENTRY <br />TR-55 SHEET FLOW <br />Grass: Dense n=.24 <br />DIRECT ENTRY <br />CIRCULAR CHANNEL <br />18" Diameter a=1.77 <br />s=.005 '/' n=.013 <br /> <br />L=70' <br /> <br />sq-ft <br />V=4.2 <br /> <br />SCS TR-20 METHOD <br />TYPE II 24-HOUR <br />RAINFALL= 5.90 IN <br />SPAN= 0-40 HRS, dt=.l HRS <br /> <br />Comment <br />ROOF TO GROUND <br />Segment ID: <br />P2=2.7 in s=.02 '/' <br />GUTTER FLOW @ 3 FPS <br />Segment ID: <br />Pw=4.7' r=.375' <br />fps L=360' Capacity=7.4 <br /> <br />Tc (min) <br />2.0 <br />11. 7 <br /> <br />1.5 <br />1.4 <br /> <br />cfs <br /> <br />Total Length= 430 ft <br /> <br />Total Tc= <br /> <br />16.6 <br />