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COVENANT MEADOWS A Type 11 24-hr 10 YEAR Rainfall=4.25" <br />Prepared by ROSHELL ENGINEERING Printed 5/3/2017 <br />HydroCAD® 10.00-15 s/n 01744 © 2015 HydroCAD Software Solutions LLC Page 18 <br />Summary for Subcatchment NE: PROPOSED <br />Runoff = 0.88 cfs @ 12.09 hrs, Volume= <br />0.091 af, Depth= 0.45" <br />Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-120.00 hrs, dt= 0.01 hrs <br />Type II 24-hr 10 YEAR Rainfall=4.25" <br />Area (ac) CN Description <br />2.400 51 1 acre lots, 20% imp, HSG A <br />1.920 80.00% Pervious Area <br />0.480 20.00% Impervious Area <br />Tc Length Slope Velocity Capacity Description <br />(min) (feet) (ft/ft) (ft/sec) (cfs) <br />12.6 200 0.0500 0.26 Sheet Flow, Sheet Flow <br />Grass: Short n= 0.150 P2= 2.80" <br />0.95 1 0.88 cfs <br />0.9 <br />0.85 <br />0.8 <br />0.75 <br />0.7 <br />0.65 <br />0.6 <br />0.55 <br />0.5 <br />0.45 <br />0.4 <br />0.35 <br />0.3= <br />0.254 <br />0.2 <br />0.1 <br />0.05 <br />0 <br />5 <br />Subcatchment NE: PROPOSED <br />Hydrograph <br />10 YEA <br />Type 1124-hr <br />R Rainfall=4;2-5" <br />Runoff Area=2.4-00- ac <br />Runoff Volume=0;091 af <br />Runoff Depit-h=0:45" <br />Flow_L <br />Slop <br />ength=200' <br />e=0.0500 '/' <br />Tc=12.6 min <br />CN=51 <br />10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115 120 <br />Time (hours) <br />■ Runoff <br />You created this PDF from an application that is not licensed to print to novaPDF printer (http://www.novapdf.com) <br />