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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 870.08' (Flood elevation advised) <br />[80] Warning: Exceeded Pond 6P by 0.78' @ 12.11 hrs (2.63 cfs 0.042 af) <br />[80] Warning: Exceeded Pond 9P by 1.88' @ 12.33 hrs (3.70 cfs 0.073 af) <br />[80] Warning: Exceeded Pond 10P by 0.79' @ 12.11 hrs (1.49 cfs 0.027 af) <br />Inflow Area = 0.335 ac,100.00% Impervious, Inflow Depth > 5.17" for 100 -yr event <br />Inflow = 2.76 cfs @ 12.26 hrs, Volume= 0.144 af <br />Outflow = 2.76 cfs @ 12.26 hrs, Volume= 0.144 af, Atten= 0 %, Lag= 0.0 min <br />Primary = 2.76 cfs @ 12.26 hrs, Volume= 0.144 af <br />Routing by Dyn -Stor -Ind method, Time Span= 5.00 -20.00 hrs, dt= 0.01 hrs <br />Peak Elev= 870.08' @ 11.97 hrs <br />Device Routing Invert Outlet Devices <br />#1 Primary 865.68' 12.0" Round Culvert <br />L= 75.0' RCP, square edge headwall, Ke= 0.500 <br />Inlet / Outlet Invert= 865.68' / 865.31' S= 0.0049 '/' Cc= 0.900 <br />n= 0.013 Concrete pipe, straight & clean <br />Primary OutFlow Max =1.73 cfs @ 12.26 hrs HW= 869.56' TW= 869.27' (Dynamic Tailwater) <br />L1= Culvert (Outlet Controls 1.73 cfs @ 2.20 fps) <br />0 <br />0 <br />LL <br />H <br />H <br />Summary for Pond 5P: MH 405 <br />Pond 5P: MH 405 <br />Hydrograph <br />t <br />i <br />1 2.76 / cfs <br />I2.76cfs I <br />Type 11 24-hr 100 -yr Rainfall = 5.90" <br />Printed 12/1/2010 <br />Page 23 <br />Inflow (Area -0.335 ac <br />Peak Elev= 870.08' <br />12.0" <br />Round Culvert <br />n =0.013 <br />H H L- 75.0' <br />S= 0.0049 /' <br />Ij <br />i <br />10 11 12 13 14 <br />Time (hours) <br />15 <br />16 <br />17 <br />18 <br />19 <br />20 <br />❑ Inflow <br />❑ Primary <br />