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 14 Summary for Subcatchment 11i: Imp Runoff = 0.47 cfs @ 1.08 hrs, Volume= Routed to Pond 11FT : 12x6 FT 576 cf, Depth= 1.03" 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) 6,684 6,684 Tc (min) 1.2 Length (feet) 100 0.6 170 1.8 270 CN 98 Description Paved parking, HSG D 100.00% Impervious Area Slope Velocity Capacity Description (ft/ft) (ft/sec) (cfs) 0.0200 1.43 Sheet Flow, Smooth surfaces n= 0.011 P2= 3.47" 0.0560 4.80 Shallow Concentrated Flow, Paved Kv= 20.3 fps Total Subcatchment 11i: Imp Flow (cfs) Hydrograph 0.52 0.5 0.47 cfs 0.48 0.46 0.44 0.42 0.4 0.38 0.36 0.34 0.32 0.3 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 0 2 4 6 Runoff NJ DEP 2-hr WQ Rainfall=1.25" Runoff Area=6,684 sf Runoff Volume=576 cf Runoff Depth=1.03" Flow Length=270' Tc=1.8 min CN=98 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)