7263 20190410 PREDEV Type IA 24-hr Flood Control Rainfall=3.60" <br />Prepared by AKS Engineering & Forestry, LLC Printed 5/2/2019 <br />HydroCAD® 10.00-20 s/n 05097 © 2017 HydroCAD Software Solutions LLC Page 2 <br />Summary for Subcatchment Outfall Trib: Pre-Dev Trib to Outfall <br />Runoff = 0.50 cfs @ 7.92 hrs, Volume= 0.169 af, Depth= 2.97" <br />Runoff by SBUH method, Split Pervious/Imperv., Time Span= 0.00-36.00 hrs, dt= 0.05 hrs <br />Type IA 24-hr Flood Control Rainfall=3.60" <br />Area (sf) CN Description <br />26,160 <br />98 <br />Paved parking, HSG A <br />3,462 <br />39 <br />>75% Grass cover, Good, HSG A <br />29,622 <br />91 <br />Weighted Average <br />3,462 <br />39 <br />11.69% Pervious Area <br />26,160 <br />98 <br />88.31 % Impervious Area <br />Tc Length Slope Velocity Capacity Description <br />(min) (feet) (ft/ft) (ft/sec) (cfs) <br />6.0 Direct Entry, <br />Summary for Subcatchment Overland: Pre-Dev Overland to Canal <br />Runoff = 0.00 cfs @ 24.00 hrs, Volume= 0.000 af, Depth= 0.01" <br />Runoff by SBUH method, Split Pervious/Imperv., Time Span= 0.00-36.00 hrs, dt= 0.05 hrs <br />Type IA 24-hr Flood Control Rainfall=3.60" <br />Area (so CN Description <br />16,198 39 >75% Grass cover, Good, HSG A <br />16,198 39 100.00% Pervious Area <br />Tc Length Slope Velocity Capacity Description <br />(min) (feet) (ft/ft) (ft/sec) (cfs) <br />14.3 170 0.0200 0.20 Sheet Flow, Lawn <br />Grass: Short n= 0.150 P2= 3.50" <br />Summary for Link Total Pre: Total Pre-Dev Flow <br />Inflow Area = 1.052 ac, 57.09% Impervious, Inflow Depth = 1.93" for Flood Control event <br />Inflow = 0.50 cfs @ 7.92 hrs, Volume= 0.169 of <br />Primary = 0.50 cfs @ 7.92 hrs, Volume= 0.169 af, Atten= 0%, Lag= 0.0 min <br />Primary outflow = Inflow, Time Span= 0.00-36.00 hrs, dt= 0.05 hrs <br />