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T:\0742\1406\June11 CityApplSurface Water\ <br />ER Landfill 06_2011 Type 1124-hr 25 yr Rainfall=4.70" <br />Prepared by Wenck Associates, Inc. Printed 8/2J2011 <br />HydroCAD® 9.10 s/n 02201 ©2010 HydroCAD Software Solutions LLC Page 13 <br />Summary for Subcatchment 7: 7 <br />Runoff = 28.76 cfs @ 12.05 hrs, Volume= 1.735 af, Depth= 2.37" <br />Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-96.00 hrs, dt= 0.02 hrs <br />Type II 24-hr 25 yr Rainfall=4.70" <br />Area (sf) CN Description <br />382,086 77 Top of Landfill <br />382,086 100.00% Pervious Area <br />Tc Length Slope Velocity Capacity Description <br />(min) (feet) (ft/ft) (ft/sec) (cfs) <br />9.0 540 1.00 Direct Entry, <br />0.1 80 9.00 Direct Entry, <br />4.0 600 2.50 Direct Entrv. <br />13.1 1,220 Total <br />Subcatchment 7: 7 <br />Hydrograph <br />30 -28.76 cfs ~ - _ _ Runoff <br />;Type' II 24-hr 25 yr <br />25 ~ ~ Rainfall=4.70" '~ <br />'Runoff Area~382,086sf <br />20 Runoff Volume=1.735 'af <br />- -~- - ~ - = - , - - -Ruruff ~epti~=2.3~" - <br />0 15 Flow Length=1;,220' <br />uL <br />_ _ _ _ ~ ~ . - , Tc=1;3.1-min- <br />10 ~ ~ I ~ , <br />CN=77 <br />5 I <br />0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 <br />Time (hours) <br />