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ZZZ15326 Existing Proposed Drainage - Wetland <br />Prepared by Microsoft <br />HydroCAD® 10.00-14 s/n 01542 ©2015 HydroCAD Software Solutions LLC <br />Type 11 24-hr 2-yr Rainfall=2.86" <br />Printed 6/8/2017 <br />Paae 8 <br />Summary for Subcatchment 3S: TO INFILTRATION A <br />Runoff = 0.29 cfs @ 12.02 hrs, Volume= <br />0.021 af, Depth= 0.68" <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 2-yr Rainfall=2.86" <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 />0.32 <br />0.3 <br />0.28 <br />0.26 <br />0.24 <br />0.22 <br />0.2 <br />u 0.18 <br />0.16 <br />0 <br />LL 0.14 <br />0.12 <br />0.1 <br />0.08 <br />0.06 <br />0.04 <br />0.02 <br />0 <br />Subcatchment 3S: TO INFILTRATION A <br />Hyd rog raph <br />Trim <br />Type II 24-fir <br />. . . . . . . . . . . . :........ <br />2-yr Rainfall= .8.6' <br />Runoff Area=.i 6 4.'i..5$ ......... <br />................ <br />................ <br />................ <br />Runoff`Voiume=O 021 of <br />Runoff Depth O.68' <br />Flovu t0ngth=1210; <br />Slope=Q.0239 'f• <br />Tc=11.4 rnin <br />cN=5219$ <br />i it <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 <br />Time (hours) <br />• Runoff <br />