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2012 Construction Revision Type 1124 -hr 100 -yr, 24 -hr Rainfall = 2.80" <br />Prepared by {enter your company name here} Printed 5/10/2012 <br />HydroCADO 10.00 sin 00604 © 2011 HydroCAD Software Solutions LLC Page 15 <br />Runoff <br />Area (ac) CN Description <br />1.910 70 Brush, Fair, HSG C <br />1.910 100.00% Pervious Area <br />Summary for Subcatchment 7S: Area 7 <br />1.91 cfs @ 11.99 hrs, Volume= 0.096 af, Depth= 0.61" <br />Runoff by SCS TR -20 method, UH =SCS, Time Span= 0.00 -80.00 hrs, dt= 0.01 hrs <br />Type II 24 -hr 100 -yr, 24 -hr Rainfall= 2.80" <br />Tc Length Slope Velocity Capacity Description <br />(min) (feet) (ft/ft) (ft/sec) (cfs) <br />1.9 100 0.4000 0.90 Sheet Flow, Initial <br />Fallow n= 0.050 P2= 1.40" <br />0.1 32 0.4000 6.32 Shallow Concentrated Flow, Secondary Sheet <br />Nearly Bare & Untilled Kv= 10.0 fps <br />4.3 680 0.0100 2.63 26.32 Channel Flow, Channel <br />Area= 10.0 sf Perim= 12.0' r= 0.83' <br />n= 0.050 Earth, cobble bottom, clean sides <br />6.3 812 Total <br />0 <br />U- <br />Subcatchment 7S: Area 7 <br />Hydrograph <br />Type II 24 -hr <br />100 -yr <br />24 -hr Rainfall- 2.80" <br />Runoff Area =1.910 ac <br />Runoff Volume =0.096 af <br />Runoff Depth= 0.61" <br />Flow Length =812' <br />Tc =6.3 min <br />CN =70 <br />0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72 74 76 78 80 <br />Time (hours) <br />® Runoff <br />