J_2024 05 09_West Orange Stormwater Management Plan

Post-Developed (O-AquaShield) West Orange HydroCAD_Pre NOAA 24-hr D 100-Year_Future Rainfall=11.58", P2=4.07" Prepared by Burns & McDonnell Printed 5/13/2024 Page 46 HydroCAD® 10.20-4b s/n 08510 © 2023 HydroCAD Software Solutions LLC Time span=0.00-24.00 hrs, dt=0.0100 hrs, 2401 points Runoff by SCS TR-20 method, UH=SCS, Weighted-Q Reach routing by Dyn-Stor-Ind method - Pond routing by Dyn-Stor-Ind method Subcatchment 22S: PO-DA 6 Runoff Area=96,853 sf 19.09% Impervious Runoff Depth>9.66" Flow Length=491' Tc=17.0 min CN=WQ Runoff=16.29 cfs 1.791 af Subcatchment 23S: PO-DA 8 Runoff Area=16,786 sf 69.53% Impervious Runoff Depth>10.83" Flow Length=178' Tc=7.5 min CN=WQ Runoff=4.01 cfs 0.348 af Pond 20P: O-AquaShield Inflow=18.67 cfs 2.138 af Primary=18.67 cfs 2.138 af Total Runoff Area = 2.609 ac Runoff Volume = 2.138 af Average Runoff Depth = 9.84" 73.46% Pervious = 1.917 ac 26.54% Impervious = 0.692 ac