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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 />[82] Warning: Early inflow requires earlier time span <br />[57] Hint: Peaked at 870.36' (Flood elevation advised) <br />[90] Warning: Qout >Qin may require Finer Routing or smaller dt <br />[87] Warning: Oscillations may require Finer Routing or smaller dt <br />Inflow Area = 0.154 ac,100.00% Impervious, Inflow Depth > 5.18" for 100 -yr event <br />Inflow = 1.33 cfs @ 11.96 hrs, Volume= 0.066 af <br />Outflow = 1.34 cfs @ 11.95 hrs, Volume= 0.066 af, Atten= 0 %, Lag= 0.0 min <br />Primary = 1.34 cfs @ 11.95 hrs, Volume= 0.066 af <br />Routing by Dyn -Stor -Ind method, Time Span= 5.00 -20.00 hrs, dt= 0.01 hrs <br />Peak Elev= 870.36' @ 11.98 hrs <br />Device Routing Invert Outlet Devices <br />0 <br />N <br />U <br />0 <br />O <br />LL <br />Summary for Pond 11P: RD 406A <br />#1 Primary 866.24' 12.0" Round Culvert <br />L= 16.0' CPP, square edge headwall, Ke= 0.500 <br />Inlet / Outlet Invert= 866.24' / 866.16' S= 0.0050 '/' Cc= 0.900 <br />n= 0.010 PVC, smooth interior <br />Primary OutFlow Max =0.62 cfs @ 11.95 hrs HW= 870.16' TW= 870.14' (Dynamic Tailwater) <br />L1= Culvert (Inlet Controls 0.62 cfs @ 0.78 fps) <br />Pond 11P: RD 406A <br />Hydrograph <br />5 6 7 8 9 10 11 12 13 14 15 16 17 18 <br />Time (hours) <br />Type 11 24-hr 100 -yr Rainfall = 5.90" <br />Printed 12/1/2010 <br />Page 31 <br />19 20 <br />❑ Inflow <br />❑ Primary <br />