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HomeMy WebLinkAboutApplication Files_85048_pg0196 PRE-DEVELOPMENT DRAINAGE 2007-058 Jones-PRE Type lU 24-hr 90 year Rainfall=4.70" Prepared by J.R. Russo &Associates Printed 12/11/2010 HydroCAD®8.50 s/n 002386 ©2007 HvdroCAD Software Solutions LLC Paae 6 Summary for Subcatchment 6S: Sullivan Ave to CB tRunoff = 1.48 cfs @ 12.07 hrs, Volume= 0.115 af, Depth> 4.46" Runoff by SCS TR-20 method, UH=SCS, Time Span= 1.00-72.00 hrs, dt= 0.01 hrs Type III 24-hr 10-year Rainfall=4.70" Area (ac) CN Description ' 0.310 98 Paved parking & roofs 0.310 Impervious Area ' Tc Length, Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 5.0 Direct Entry, Summary for Subcatchment 20: To DP#2 Runoff = 5.50 cfs @ 13.06 hrs, Volume= 1.342 af, Depth= 0.89" Runoff by SCS TR-20 method, UH=SCS, Time Span= 1.00-72.00 hrs, dt= 0.01 hrs Type III 24-hr 10-year Rainfall=4.70" Area (ac) CN Description 0.200 98 Paved parking & roofs 1.530 70 Woods, Good, HSG C 11.500 55 Woods, Good, HSG B 2.600 30 Woods, Good, HSG A 0.870 48 Brush, Good, HSG B 1.370 98 Water Surface 18.070 56 Weighted Average 1 16.500 Pervious Area 1.570 Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 14.9 100 0.0500 0.11 Sheet Flow, Woods: Light underbrush n= 0.400 P2=3.20" 51.9 1,100 0.0050 0.35 Shallow Concentrated Flow, Woodland Kv= 5.0 fps 66.8 1,200 Total Summary for Reach 3R: Basin to MH Inflow Area = 8.170 ac, 41.25% Impervious, Inflow Depth = 0.88" for 10-year event Inflow 2.44 cfs @ 12.51 hrs, Volume= 0.598 of Outflow = 2.43 cfs @ 12.67 hrs, Volume= 0.598 af, Atten= 0%, Lag= 9.3 min