J_2024 05 09_West Orange Stormwater Management Plan

Type III 24-hr 100 yr Rainfall=8.72" Pre-Development West Orange with ponds 2 Prepared byTRC Engineers, Inc. HydroCAD® 9.10 s/n 06401 © 2009 HydroCAD Software Solutions LLC Printed 3/4/2012 Page 59 Summary for Reach 13R: Swale Inflow Area = Inflow = Outflow = 2.404 ac, 2.87% Impervious, Inflow Depth = 6.37" for 100 yr event 16.51 cfs @ 12.11 hrs, Volume= 1.275 af 16.15 cfs @ 12.13 hrs, Volume= 1.275 af, Atten= 2%, Lag= 1.1 min Routing by Dyn-Stor-Ind method, Time Span= 0.00-30.00 hrs, dt= 0.01 hrs / 2 Max. Velocity3 4.38 fps, Min. Travel Time= 1.6 min Avg. Velocity = 1.11 fps, Avg. Travel Time= 6.3 min Peak Storage3 1,546 cf @ 12.13 hrs Average Depth at Peak Storage3 0.41' Bank-Full Depth3 0.50’, Capacity at Bank-Full3 24.59 cfs 5.00' x 0.50' deep channel, n= 0.030 Short grass Side Slope Z-value= 10.0 '/' Top Width3 15.00' Length3 420.0' Slope3 0.0429 '/' Inlet Invert3 598.00', Outlet Invert3 580.00' Reach 13R: Swale Hydrograph 18- 16.51 cfs 17" IS- 16.15 cfs ----- I Inflow I I Outflow! Inflow Area=2.404 ac Avg. Flow Depth=0.41' 15 13- M i Max Vel=4.38 fps -> r--< --r-: n=0.030 l i L=420.0 -i— S=0.0429 T Capacity=24.59 cfs -r-r-r-T 12 11 i 10- -t-- 9- 3 -r-1 i - i — - - - i — r - r - i - i - - 2 1. 2345678 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Time (hours)