J_2024 05 09_West Orange Stormwater Management Plan

Type III 24-hr 2 yr Rainfall=3.42" Post Development West Orange C_03 01 12 Prepared by TRC Engineers, Inc. Printed 3/14/2012 Page 3 HydroCAD® 9.10 s/n 06401 © 2009 HydroCAD Software Solutions LLC Summary for Subcatchment 1: PO-DA 1 0.203 af, Depth= 1.83" 1.92 cfs @ 12.25 hrs, Volume= Runoff Runoff by SCS TR-20 method, UH=SCS, Split Pervious/Imperv., Time Span= 0.00-30.00 hrs, dt= 0.01 hrs Type III 24-hr 2 yr Rainfall=3.42" CN 98 79 78 83 79 98 Area (sf) 11,168 38,971 8,088 58,227 47,059 11,168 * Tc (min) 16.9 Length (feet) 150 1.3 270 18.2 420 Description Impervious, HSG D Woods/grass comb., Good, HSG D Meadow, non-qrazed, HSG D Weighted Average 80.82% Pervious Area 19.18% Impervious Area Slope Velocity Capacity Description (cfs) (ft/ft) (ft/sec) Sheet Flow, 0.15 0.0270 Grass: Dense n= 0.240 P2= 3.42" Shallow Concentrated Flow, 3.42 0.0520 Grassed Waterway Kv= 15.0 fps Total Subcatchment 1: PO-DA 1 Hydrograph __J .L l 1.92 cfs Type III 24-hr 2 yr Rainfall=3.42' Runoff Area=58,227 sf % Runoff Volume=0.203 af % o 1- Runoff Depth=1.83' Flow Length=420' Tc=18.2 min CN=79/98 0 1 2 3 4 56 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Time (hours)