complete drainage report rev 9

NJ DEP 2-hr WQ Rainfall=1.25" Combined FT (8-22-24) Prepared by Contech Engineered Solutions HydroCAD® 10.20-3f s/n 00447 © 2023 HydroCAD Software Solutions LLC Printed 8/26/2024 Page 13 Summary for Subcatchment 10p: Perv Runoff = 0.09 cfs @ 1.09 hrs, Volume= Routed to Pond 10FT : 8x6 FT 76 cf, Depth= 0.17" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.00 hrs, dt= 0.01 hrs NJ DEP 2-hr WQ Rainfall=1.25" Area (sf) 5,247 5,247 Tc (min) 1.2 Length (feet) 100 0.3 85 1.5 185 CN 80 Description >75% Grass cover, Good, HSG D 100.00% Pervious Area Slope Velocity Capacity Description (ft/ft) (ft/sec) (cfs) 0.0200 1.43 Sheet Flow, Smooth surfaces n= 0.011 P2= 3.47" 0.0460 4.35 Shallow Concentrated Flow, Paved Kv= 20.3 fps Total Subcatchment 10p: Perv Hydrograph 0.095 Runoff 0.09 0.09 cfs 0.085 0.08 0.075 0.07 0.065 Flow (cfs) 0.06 0.055 0.05 0.045 0.04 0.035 0.03 0.025 0.02 NJ DEP 2-hr WQ Rainfall=1.25" Runoff Area=5,247 sf Runoff Volume=76 cf Runoff Depth=0.17" Flow Length=185' Tc=1.5 min CN=80 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)