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COVENANT MEADOWS A Type 11 24-hr 2 YEAR Rainfall=2.86" <br />Prepared by ROSHELL ENGINEERING Printed 5/3/2017 <br />HydroCAD® 10.00-15 s/n 01744 © 2015 HydroCAD Software Solutions LLC Page 8 <br />Summary for Subcatchment NW: PROPOSED <br />Runoff = 0.06 cfs @ 13.40 hrs, Volume= <br />0.041 af, Depth= 0.08" <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 2 YEAR Rainfall=2.86" <br />Area (ac) CN Description <br />5.830 51 1 acre lots, 20% imp, HSG A <br />4.664 80.00% Pervious Area <br />1.166 20.00% Impervious Area <br />Tc Length Slope Velocity Capacity Description <br />(min) (feet) (ft/ft) (ft/sec) (cfs) <br />20.5 200 0.0150 0.16 Sheet Flow, Sheet Flow <br />Grass: Short n= 0.150 P2= 2.80" <br />2.3 200 0.0050 1.44 Shallow Concentrated Flow, CONCENTRATED <br />Paved Kv= 20.3 fps <br />22.8 400 Total <br />0 <br />LL <br />0.0657 <br />0.06- <br />0.0557 <br />0.05 <br />0.0457 <br />0.035= <br />0.03� <br />0.02= <br />0.015 <br />0.017 i <br />0.00s <br />5 10 15 20 <br />Subcatchment NW: PROPOSED <br />Hydrograph <br />0.06cfs <br />Type N 24-h <br />2Y-EAR Rainfall=2.86 <br />r <br />Runoff Area=5.830 ac <br />Runoff Volume0.041 of <br />Runoff <br />Flow <br />Depth=0.08" <br />Length=400' <br />T-c=22.8_ min <br />CN=51 <br />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 />