J_2024 05 09_West Orange Stormwater Management Plan

Pre-Development West Orange with ponds 2 Prepared byTRC Engineers, Inc. HydroCAD® 9.10 s/n 06401 © 2009 HydroCAD Software Solutions LLC Type III 24-hr 10 yr Rainfall=5.21" Printed 3/4/2012 Page 37 Summary for Reach 13R: Swale Inflow Area = Inflow = Outflow = 2.404 ac, 2.87% Impervious, Inflow Depth = 3.13" for 10 yr event 8.27 cfs@ 12.11 hrs, Volume= 0.627 af 8.02 cfs @ 12.13 hrs, Volume= 0.627 af, Atten= 3%, Lag=1.4min Routing by Dyn-Stor-Ind method, Time Span= 0.00-30.00 hrs, dt= 0.01 hrs / 2 Max. Velocity= 3.60 fps, Min. Travel Time= 1.9 min Avg. Velocity = 0.87 fps, Avg. Travel Time3 8.1 min Peak Storage= 935 cf @ 12.13 hrs Average Depth at Peak Storage= 0.28' Bank-Full Depth= 0.50’, Capacity at Bank-Full= 24.59 cfs 5.00' x 0.50' deep channel, n= 0.030 Short grass Side Slope Z-value= 10.0 '/' Top Width= 15.00' Length3 420.0' Slope3 0.0429 7 Inlet Invert3 598.00', Outlet Invert3 580.00' Reach 13R: Swale Hydrograph i—i—i—i—— i —i—i— r - r - -r 8.27 cfs 8.02 cfs I--P I Inflow I Outflow Inflow Area=2.404 ac Flow Depth-0.28’ Avg. -I G r: Max Vel=3.60 fps -r-i n=0.030 r L=420.0? S=0.0429 V Capacity=24.59 cfs E4 . r - i - -i - -|- -1 t —r ~ ii 1 2 3 4 5 6 78 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Time (hours)