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UWA10002 - Alley Ponding <br />Prepared by {enter your company name here} <br />HydroCAD® 9.10 s/n 01542 © 2009 HydroCAD Software Solutions LLC <br />Runoff <br />Runoff by SCS TR -20 method, UH =SCS, Time Span= 5.00 -20.00 hrs, dt= 0.01 hrs <br />Type II 24 -hr 100 -yr Rainfall = 5.90" <br />Tc Length Slope Velocity Capacity Description <br />(min) (feet) (ft /ft) (ft /sec) (cfs) <br />5.0 <br />0.28- <br />0.261 <br />0.24 <br />0.22 <br />0.2 <br />0.18 -' <br />w 0.161 <br />0 0.14- <br />0.12 -' <br />0.1 <br />Area (sf) CN Description <br />1,295 98 Paved parking, HSG C <br />1,295 100.00% Impervious Area <br />0.08— <br />0.061 <br />0.04— <br />0.02— <br />0.26 cfs @ 11.96 hrs, Volume= <br />li <br />%0 <br />6 <br />r ---- r --- r - - - - <br />7 <br />r <br />8 <br />Summary for Subcatchment 5S: CB 404A DA <br />9 <br />L <br />Subcatchment 5S: CB 404A DA <br />10 <br />11 <br />Hydrograph <br />Direct Entry, <br />Type 11 24 100 - yr Rainfall = 5.90" <br />Printed 12/1/2010 <br />Page 11 <br />0.013 af, Depth> 5.18" <br />+ <br />Type )124 -hr - 100'yyr- - <br />Rai rfatl5.9i0" - <br />r --- Runoff Are0 =1,p511 i - <br />Bunoff!VoI',umo =0.p13!af <br />R-ufpo#i- DOth 5,18 " - - <br />T i = Thin - - <br />CN -98 <br />r + <br />i <br />i <br />r <br />12 13 14 15 16 <br />Time (hours) <br />17 <br />18 19 <br />20 <br />• Runoff <br />