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 207 Prepared by Burns & McDonnell HydroCAD® 10.20-4b s/n 08510 © 2023 HydroCAD Software Solutions LLC Summary for Subcatchment 8S: PO-DA F Runoff = 0.62 cfs @ 12.13 hrs, Volume= Routed to Reach 4R : TD-02 0.044 af, Depth> 6.19" 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) 1,220 2,526 3,746 3,746 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) 5.6 66 0.2264 0.20 Sheet Flow, Sheet Flow Woods: Light underbrush n= 0.400 P2= 3.45" Subcatchment 8S: PO-DA F Hydrograph Runoff 0.65 0.62 cfs NOAA 24-hr D 100-Year_Current Rainfall=9.23" P2=3.45" Runoff Area=3,746 sf Runoff Volume=0.044 af Runoff Depth>6.19" Flow Length=66' Slope=0.2264 '/' Tc=5.6 min CN=WQ 0.6 0.55 0.5 Flow (cfs) 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