J_2024 05 09_West Orange Stormwater Management Plan

Post-Developed (O-1A) NOAA 24-hr D 2-Year_Current Rainfall=3.45", P2=3.45" West Orange HydroCAD_Post Printed 5/13/2024 Page 53 Prepared by Burns & McDonnell HydroCAD® 10.20-4b s/n 08510 © 2023 HydroCAD Software Solutions LLC Summary for Subcatchment 10S: PO-DA H Runoff = 0.30 cfs @ 12.15 hrs, Volume= Routed to Reach 5R : TD-03 0.023 af, Depth> 1.16" Runoff by SCS TR-20 method, UH=SCS, Weighted-Q, Time Span= 0.00-24.00 hrs, dt= 0.0100 hrs NOAA 24-hr D 2-Year_Current Rainfall=3.45", P2=3.45" Area (sf) 436 9,845 10,281 10,281 CN 80 73 Description >75% Grass cover, Good, HSG D Brush, Good, HSG D Weighted Average 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 7.4 82 0.1736 0.18 Sheet Flow, Sheet Flow Woods: Light underbrush n= 0.400 P2= 3.45" Subcatchment 10S: PO-DA H Hydrograph Runoff 0.32 0.30 cfs NOAA 24-hr D 2-Year_Current Rainfall=3.45" P2=3.45" Runoff Area=10,281 sf Runoff Volume=0.023 af Runoff Depth>1.16" Flow Length=82' Slope=0.1736 '/' Tc=7.4 min CN=WQ 0.3 0.28 0.26 0.24 Flow (cfs) 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 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