21 Stormwater Mgmt Report_082025

NOAA 24-hr D 100-Year-Future Rainfall=11.52", P2=4.09" NJA230139 - REV 0 Prepared by Bohler HydroCAD® 10.20-5c s/n 03478 © 2023 HydroCAD Software Solutions LLC Printed 8/6/2025 Page 28 Summary for Subcatchment E1p: Existing Pervious Runoff = 0.05 cfs @ 12.18 hrs, Volume= Routed to Link E1 : EDA 1A 213 cf, Depth= 2.93" Runoff by SCS TR-20 method, UH=SCS, Split Pervious/Imperv., Time Span= 0.00-72.00 hrs, dt= 0.10 hrs NOAA 24-hr D 100-Year-Future Rainfall=11.52", P2=4.09" Area (ac) 0.020 0.020 CN 39 39 Tc Length (min) (feet) 5.3 85 Description >75% Grass cover, Good, HSG A 100.00% Pervious Area Slope (ft/ft) 0.0500 Velocity (ft/sec) 0.27 0.2 15 0.0400 1.40 0.5 121 0.0400 4.06 2.1 285 0.0120 2.22 0.1 20 0.6600 4.06 8.2 526 Total Capacity (cfs) Description Sheet Flow, Grass: Short n= 0.150 P2= 4.09" Sheet Flow, Smooth surfaces n= 0.011 P2= 4.09" Shallow Concentrated Flow, Paved Kv= 20.3 fps Shallow Concentrated Flow, Paved Kv= 20.3 fps Shallow Concentrated Flow, Woodland Kv= 5.0 fps Subcatchment E1p: Existing Pervious Hydrograph 0.055 0.05 0.045 0.04 Flow (cfs) 0.035 0.03 0.025 0.02 Runoff 0.05 cfs NOAA 24-hr D 100-Year-Future Rainfall=11.52" P2=4.09" Runoff Area=0.020 ac Runoff Volume=213 cf Runoff Depth=2.93" Flow Length=526' Tc=8.2 min CN=39/0 0.015 0.01 0.005 0 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72 Time (hours)