Loading...
HomeMy WebLinkAboutApplication Files_82693_pg0680 72189 PR Type 111 24-hr 2-Year Storm Rainfall=3.20" Prepared by {enter your company name here} Printed 7/26/2011 HydroCADO 9 10 s/n 01237 ©2009 HvdroCAD Software Solutions LLC Page 5 Summary-for Subcatchment PR'IA: Area-Around Biofiltration Basin 5 - Runoff = 1.11 cfs @ 12.11 hrs, Volume= 0.099 af, Depth= 0.64" Runoff by SCS TR-20 method, UH=SCS, Time Span=0.00-72.00 hrs, dt= 0.05 hrs , Type III 24-hr 2-Year Storm Rainfall=3.20" Area (sf) CN Description ' * 27,712 98 Impervious 2,003 36 Woods, Fair, HSG A 2,900 35 Brush, Fair, HSG A * 9,829 98 Water 37,645 39 >75% Grass cover, Good, HSG A 80,089 66 Weighted Average ' 42,548 53.13% Pervious Area 37,541 46.87%© Impervious Area Tc Length Slope Velocity Capacity Description , (min) (feet) (ft/ft) (fusee) (cfs) 4.3 50 0.0400 0.20 Sheet Flow,A-13 Grass: Short n= 0.150 P2=3.20" 1 1.5 135 0.0444 1.47 Shallow Concentrated Flow, B-C Short Grass Pasture Kv= 7.0 fps 0 2 Direct Entry, Min Tc=6.0 6.0 185 Total Summary for Subcatchment PR1 B: Ellington Road Access Drive & Existing Depression , Runoff = 1.36 cfs @ 12.11 hrs, Volume= 0.114 af, Depth= 0.73" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-72.00 hrs, dt= 0.05 hrs , Type III 24-hr 2-Year Storm Rainfall=3.20" Area(sf) CN Description ' * 15,224 98 Impervious * 11,264 98 Water Surface 25,385 69 50-76%Grass cover, Fair, HSG B ' 10,328 35 Brush, Fair, HSG A 8,272 36 Woods, Fair, HSG A 5,258 61 >75% Grass cover, Good, HSG B ' 5,665 39 >75% Grass cover, Good, HSG A 81,396 68 Weighted Average . 54,908 67.46%p Pervious Area ' 26,488 32.54% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) , 6.0 Direct Entry, Min. Tc=6.0