Revised Stormwater Management Report

[Project Name Description Analysis Date BMP or LID e West Essex Highlands _|West Orange, Essex Coun’ 05/31/24 HI - = = a ay - Parameter Symbol Parameter Symbol Value Unit Parameter Symbol Value Unit Empty Portion BMP Area ABMP lof RWC under PostD | ERWC 0.39 |in inches of Runoft Qdesign | 0.70 Natural Recharge la BMP Effective Depth, ERWC Modified to F inches of Rainfall this is the design variable | _¢°MP Iconsider dEXC EDRWC [nce to capture Pelssion | iiimaas Upper level of the BMP lEmpty Portion surface (negative ifabove | dBMPu lof RWC under In Rerwe | 0.00 |in peeraras: revises 28.2. fin ponees ay Wg. over Imp. Area Sees Depth of lower surface of Runoff Captured IBMP, must be>=dBMPu EXC |Avg. over imp. Area eae" Post-development Land [Segment Location of BMP i Sega | input Ze # Location is distributed Jo-undetermined [BMP Calculated Size Parameters aT CULATION CHEC ABMPYAimp Aratio Volume Balance> Solve to satisfy Annual Recharge BMP Volume BMP Check—-> OK ance Ci dEXC Check-—> OK |Post-D Deficit Recharge lor desired recharge Vader cuit Snrual BMP Recharge 76,936 |cu.t volume) BMP Location> Location is selected as distributed or undetermined PostD Impervious Area | grap oqt lAvg BMP Recharge no, i (or target Impervious Area) Efficiency Recharnes Root Zone Water Capacity | RWC 237 {in PeRainfall 78.8% : became Runoff ee design is accurate only ater EMP cimensions are updated fo mcke rech volume= deft volume. The portion IRWC Modified to consider dEXC DRWO' eee BAS |. or BMP initration po and the ere occupies by BMP ere ignored in hese calculator, Results are peliietionreictot C-factor ay Ro units Recharged_ a % |senselive to EMP, make sure dBMP selected is small enough for BMP to empty in less than 3 days. Fer land Y6Rainfall Average Annual P Pavg 49.0 in Recharged 3.1% lo, ISegment Location of BMP if you select “impervious areas” RWC wil be minimal but not zero as determined by Recharge Requirement a |, jover Imp. Area = [the soil type and a shallow root zone for this Land Cover allowing consideration of lateral flow and other Iosses. How to solve for different recharge volumes: By default the spreadsheat assigns the values of total deficit recharge volume "Vd? and total proposed impervious area "Aimp” from the "Annual Recharge” sheet to der" and "Aimp" on this page. This allows solution for a single BMP to handle the entire recharge requirement

volume "Vd? and total proposed impervious area "Aimp” from the "Annual Recharge” sheet to der" and "Aimp" on this page. This allows solution for a single BMP to handle the entire recharge requirement assuming the runoff from entire impervious area is available to the BMP. To solve for a smaller BMP or a LID-IMP to recharge only part ofthe recharge requirement, set Vdef to your target value and Aimp to impervious erea directly connected to your infiration feclty and then solve for JABMP or dBMP. To go back to the default configuration clik the "Default Vdef & Aimp” button.