J_2024 05 09_West Orange Stormwater Management Plan

Post-Developed (O-1B) NOAA 24-hr D 2-Year_Current Rainfall=3.45", P2=3.45" West Orange HydroCAD_Post Printed 5/13/2024 Page 83 Prepared by Burns & McDonnell HydroCAD® 10.20-4b s/n 08510 © 2023 HydroCAD Software Solutions LLC Summary for Pond 18P: SD-22 Inflow Area = 0.917 ac, 22.90% Impervious, Inflow Depth > 2.17" for 2-Year_Current event Inflow = 0.42 cfs @ 12.79 hrs, Volume= 0.166 af Outflow = 0.42 cfs @ 12.79 hrs, Volume= 0.166 af, Atten= 0%, Lag= 0.1 min Primary = 0.42 cfs @ 12.79 hrs, Volume= 0.166 af Routed to Pond 17P : SD-23 Routing by Dyn-Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.0100 hrs Peak Elev= 588.77' @ 12.79 hrs Surf.Area= 0.000 ac Storage= 0.000 af Plug-Flow detention time= 0.1 min calculated for 0.165 af (100% of inflow) Center-of-Mass det. time= 0.1 min ( 876.4 - 876.4 ) Volume #1 Device #1 Invert 588.45' Avail.Storage 0.002 af Routing Primary Invert 588.45' Storage Description 12.0" Round SD-22 L= 127.3' S= 0.0150 '/' Outlet Devices 12.0" Vert. SD-22 C= 0.600 Limited to weir flow at low heads Primary OutFlow Max=0.42 cfs @ 12.79 hrs HW=588.77' TW=587.16' (Dynamic Tailwater) 1=SD-22 (Orifice Controls 0.42 cfs @ 1.93 fps) Pond 18P: SD-22 Flow (cfs) Hydrograph Inflow Primary 0.42 cfs 0.46 0.44 0.42 0.4 0.38 0.36 0.34 0.32 0.3 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 Inflow Area=0.917 ac Peak Elev=588.77' Storage=0.000 af 0.42 cfs 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Time (hours) 15 16 17 18 19 20 21 22 23 24