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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 />Area (sf) CN Description <br />3,250 98 Paved parking, HSG C <br />3,250 100.00% Impervious Area <br />Tc Length Slope Velocity Capacity Description <br />(min) (feet) (ft /ft) (ft /sec) (cfs) <br />5.0 <br />0.7 -' <br />- r r r ▪ 1 0.65 Osa <br />0.65 -' <br />0.6- 1 1 1 1 1 <br />I I 1 <br />0.557' <br />▪ r - - -11 <br />�r <br />3 0.4. <br />0.35 10 <br />O 1 � <br />LT- - <br />0.3- " <br />0.251 1 1 1 1 1 0 <br />r 1 r <br />0.2- 1 1 1 1 1 <br />0.45 -' <br />0.15- <br />0.65 cfs @ 11.96 hrs, Volume= <br />L <br />0.1- i I I I I <br />I -1 r <br />0.05- <br />6 <br />L <br />7 <br />8 <br />Summary for Subcatchment 3S: RD 404B DA <br />9 <br />10 <br />11 <br />Hydrograph <br />Direct Entry, <br />Subcatchment 3S: RD 404B DA <br />12 13 14 15 16 <br />Time (hours) <br />Type 11 24-hr 100 -yr Rainfall = 5.90" <br />Printed 12/1/2010 <br />Page 9 <br />0.032 af, Depth> 5.18" <br />Type 0 24.h r -1 00Eyr- - <br />Rai rtfatl 57.910 " - - <br />4- <br />4- 1- <br />r i r i r <br />Runoff Area =3,250s <br />! Runoff!Vol,ume =0.p32! of <br />Runoff Dept h >5.a " -- <br />Th=5.0 rhin -- <br />CN -98 <br />r + r- <br />r <br />17 <br />18 19 <br />20 <br />• Runoff <br />