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ZZZ15326 Existing Proposed Drainage - Wetland Type 11 24-hr 10-yr Rainfall=4.26" <br />Prepared by Microsoft Printed 6/8/2017 <br />HydroCAD® 10.00-14 s/n 01542 ©2015 HydroCAD Software Solutions LLC Page 21 <br />Summary for Subcatchment 3S: TO INFILTRATION A <br />Runoff = 0.56 cfs @ 12.04 hrs, Volume= <br />0.041 af, Depth= 1.31" <br />Runoff by SCS TR-20 method, UH=SCS, Split Pervious/Imperv., Time Span= 0.00-72.00 hrs, dt= 0.01 hrs <br />Type II 24-hr 10-yr Rainfall=4.26" <br />Area (sf) CN Description <br />3,750 98 Paved parking, HSG B <br />7,665 61 >75% Grass cover, Good, HSG B <br />5,000 39 >75% Grass cover, Good, HSG A <br />16,415 63 Weighted Average <br />12,665 52 77.16% Pervious Area <br />3,750 98 22.84% Impervious Area <br />Tc Length Slope Velocity Capacity Description <br />(min) (feet) (ft/ft) (ft/sec) (cfs) <br />11.4 120 0.0230 0.18 Sheet Flow, <br />Grass: Short n= 0.150 P2= 2.85" <br />0.6 <br />0.55 <br />0.5 <br />0.45 <br />0.4 <br />UN 0.35 <br />0.3 <br />LT_ 0.25 <br />0.2 <br />0.15 <br />0.1 <br />0.05 <br />0 2 <br />4 <br />6 <br />8 10 12 <br />Subcatchment 3S: TO INFILTRATION A <br />Hydrograph <br />14 16 18 20 22 24 26 28 <br />Typo II 24-hr <br />19.*r Rainfall=4.26' <br />Runoff Area=16.415 sf <br />Ru.noffVo1ume=O.041 a <br />:Runoff Depth 1.3 <br />.Floe LlingtIv 2`0' <br />SIopa=O.0230 <br />Tpl -111.400 <br />bN=52/98 <br />30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72 <br />Time (hours) <br />• Runoff <br />