J_2024 05 09_West Orange Stormwater Management Plan

Post-Developed (O-1A) NJ DEP 2-hr WQ Rainfall=1.25", P2=3.42" West Orange HydroCAD_Post Printed 5/13/2024 Page 14 Prepared by Burns & McDonnell HydroCAD® 10.20-4b s/n 08510 © 2023 HydroCAD Software Solutions LLC Summary for Subcatchment 10S: PO-DA H Runoff = 0.03 cfs @ 1.23 hrs, Volume= Routed to Reach 5R : TD-03 0.001 af, Depth= 0.07" Runoff by SCS TR-20 method, UH=SCS, Weighted-Q, Time Span= 0.00-24.00 hrs, dt= 0.0100 hrs NJ DEP 2-hr WQ Rainfall=1.25", P2=3.42" 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) 7.5 82 0.1736 0.18 Sheet Flow, Sheet Flow Woods: Light underbrush n= 0.400 P2= 3.42" Subcatchment 10S: PO-DA H Hydrograph 0.032 Runoff 0.03 0.03 cfs NJ DEP 2-hr WQ Rainfall=1.25" P2=3.42" Runoff Area=10,281 sf Runoff Volume=0.001 af Runoff Depth=0.07" Flow Length=82' Slope=0.1736 '/' Tc=7.5 min CN=WQ 0.028 0.026 0.024 0.022 Flow (cfs) 0.02 0.018 0.016 0.014 0.012 0.01 0.008 0.006 0.004 0.002 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