J_2024 05 09_West Orange Stormwater Management Plan

Pre-Development West Orange with ponds 2 Prepared by TRC Engineers, Inc. Type III 24-hr 10 yr Rainfall=5.21" Printed 3/4/2012 HvdroCAD® 9.10 s/n 06401 © 2009 HydroCAD Software Solutions LLC Page 36 Summary for Reach 11R: Surface Swale [55] Hint: Peak inflow is 102% of Manning's capacity Inflow Area = Inflow = Outflow = 1.049 ac, 54.04% Impervious, Inflow Depth = 15.29" for 10 yr event 24.29 cfs @ 12.13 hrs, Volume= 1.337 af 24.21 cfs @ 12.14 hrs, Volume= 1.337 af, Atten= 0%, Lag= 0.7 min Routing by Dyn-Stor-Ind method, Time Span= 0.00-30.00 hrs, dt= 0.01 hrs / 2 Max. Velocity= 4.78 fps, Min. Travel Time3 0.9 min Avg. Velocity = 0.87 fps, Avg. Travel Time= 4.8 min Peak Storage= 1,267 cf @12.14 hrs Average Depth at Peak Storage3 0.50' Bank-Full Depth3 0.50', Capacity at Bank-Full3 23.76 cfs 5.00' x 0.50' deep channel, n= 0.030 Short grass Side Slope Z-value= 10.0 '/' Top Width3 15.00' Length3 250.0' Slope3 0.0400 7 Inlet Invert3 590.00', Outlet Invert3 580.00’ Reach 11R: Surface Swale Hydrograph j_••__ i_i__ I 24 cfs 24.21 cfs J. _ J _ _ 1. - J--------- 26 _ _ L J ___ 1 __ * I __J . _ J ____ I __ I __ I __ L _ J ____• ----• _ _ yjv^fea=:1;.Q49 ap 24 22 Avg r i _ j_< _ _ L _L - 20 j__> 4. - 4 - - is-; ■ r-1 - 16 J£ ~ 14* 5 E 12-j 10-i 8 L — J — Flow: bepth=b.i>0' Max ;Vel=4.78 fps n“0:03d -r~r-t L=250;0' __ ___ L _ J _ S=0.0400T iiiiiii apacity=23.76 cfs r - ri, ■ 6 4-3 2 _ r m 0^ 0 1 2 3 4 5 6 7 8 I Inflow | I Outflow! _i____i____j. _ j _ j_________i- - i— i. _ j —i —i— i— j. _ j —i _ _i— 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Time (hours) r - r - 7 ~ i'