J_2024 05 09_West Orange Stormwater Management Plan

Post-Developed (O-1A) NOAA 24-hr D 100-Year_Current Rainfall=9.23", P2=3.45" West Orange HydroCAD_Post Printed 5/13/2024 Page 205 Prepared by Burns & McDonnell HydroCAD® 10.20-4b s/n 08510 © 2023 HydroCAD Software Solutions LLC Summary for Subcatchment 6S: PO-DA D Runoff = 1.01 cfs @ 12.15 hrs, Volume= Routed to Reach 3R : TD-01 0.078 af, Depth> 6.40" 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 100-Year_Current Rainfall=9.23", P2=3.45" Area (sf) 3,659 2,744 6,403 6,403 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) 7.6 85 0.1773 0.19 Sheet Flow, Sheet Flow Woods: Light underbrush n= 0.400 P2= 3.45" Subcatchment 6S: PO-DA D Hydrograph Runoff 1.01 cfs NOAA 24-hr D 100-Year_Current Rainfall=9.23" P2=3.45" Runoff Area=6,403 sf Runoff Volume=0.078 af Runoff Depth>6.40" Flow Length=85' Slope=0.1773 '/' Tc=7.6 min CN=WQ Flow (cfs) 1 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