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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 869.87' (Flood elevation advised) <br />[87] Warning: Oscillations may require Finer Routing or smaller dt <br />Inflow Area = 0.075 ac,100.00% Impervious, Inflow Depth > 5.18" for 100 -yr event <br />Inflow = 0.65 cfs @ 11.96 hrs, Volume= 0.032 af <br />Outflow = 0.65 cfs @ 11.96 hrs, Volume= 0.032 af, Atten= 0 %, Lag= 0.0 min <br />Primary = 0.65 cfs @ 11.96 hrs, Volume= 0.032 af <br />Routing by Dyn -Stor -Ind method, Time Span= 5.00 -20.00 hrs, dt= 0.01 hrs <br />Peak Elev= 869.87' @ 11.98 hrs <br />Device Routing Invert Outlet Devices <br />0 <br />u. <br />Summary for Pond 8P: RD 404B <br />#1 Primary 866.50' 8.0" Round Culvert <br />L= 19.0' CPP, square edge headwall, Ke= 0.500 <br />Inlet / Outlet Invert= 866.50' / 866.31' S= 0.0100'/' Cc= 0.900 <br />n= 0.010 PVC, smooth interior <br />Primary OutFlow Max =0.53 cfs @ 11.96 hrs HW= 869.80' TW= 869.70' (Dynamic Tailwater) <br />L1= Culvert (Inlet Controls 0.53 cfs @ 1.53 fps) <br />0.7- <br />0.65 - <br />0.6- <br />0.55 - <br />0.5- <br />0.47. <br />0.35 <br />0.31' <br />0.25 <br />0.2 <br />0.15, <br />0.1 T. <br />0.05 <br />0 <br />5 <br />6 <br />Pond 8P: RD 404B <br />Hydrograph <br />i <br />i <br />4 <br />I <br />l 0.65 cfs <br />Inflow - Area =0.075 ac <br />Peak Elev 869.8 8T „ <br />8.0" <br />Culvert <br />n =0.0 - <br />'-t=19.8' S=o,Q1 DQ I' - <br />y <br />f <br />/ / //� / i% %%% �%iii i� / / / : /�/ / / <br />10 11 12 13 14 <br />Time (hours) <br />15 <br />16 <br />Type 11 24-hr 100 -yr Rainfall = 5.90" <br />Printed 12/1/2010 <br />Page 27 <br />17 <br />18 <br />19 <br />20 <br />❑ Inflow <br />❑ Primary <br />