J_2024 05 09_West Orange Stormwater Management Plan

Post-Developed (O-1A) NOAA 24-hr D 10-Year_Current Rainfall=5.37", P2=3.45" West Orange HydroCAD_Post Printed 5/13/2024 Page 131 Prepared by Burns & McDonnell HydroCAD® 10.20-4b s/n 08510 © 2023 HydroCAD Software Solutions LLC Summary for Subcatchment 10S: PO-DA H Runoff = 0.69 cfs @ 12.15 hrs, Volume= Routed to Reach 5R : TD-03 0.051 af, Depth> 2.60" 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 10-Year_Current Rainfall=5.37", 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 0.75 0.69 cfs 0.7 NOAA 24-hr D 10-Year_Current Rainfall=5.37" P2=3.45" Runoff Area=10,281 sf Runoff Volume=0.051 af Runoff Depth>2.60" Flow Length=82' Slope=0.1736 '/' Tc=7.4 min CN=WQ 0.65 0.6 0.55 Flow (cfs) 0.5 0.45 0.4 0.35 0.3 0.25 0.2 0.15 0.1 0.05 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