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Using WinSLAMM For Stormwater Retrofit in Urban Environments August 22, 2011 StormCon 2011, Anaheim, CA. Presented by: James Bachhuber PH Caroline Burger PE AECOM Madison, WI. Dense Urban Land Uses Require Stormwater Retrofitting Open space is very limited Land values are very high
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Using WinSLAMM For Stormwater Retrofit in Urban EnvironmentsAugust 22, 2011StormCon 2011, Anaheim, CA Presented by: James Bachhuber PH Caroline Burger PE AECOM Madison, WI
Dense Urban Land Uses Require Stormwater Retrofitting • Open space is very limited • Land values are very high • Treatment measures have higher safety & aesthetic requirements
Overview of Santa Monica Stormwater Study Purpose of Study: Test WinSLAMM approach to stormwater management Identify priority land uses for pollutant generation Compare alternative stormwater management for pollution control levels
Overview of Santa Monica Stormwater Study Basic Approach: Identify representative pilot study area Create WinSLAMM files to represent local conditions Source areas Rainfall Drainage Soils
Overview of Santa Monica Stormwater Study Basic Approach (continued): Model pilot area with no management measures (base condition) “Retrofit” alternative management practices to predict runoff volume & pollution control achieved
Overview of Santa Monica Stormwater Study Stormwater Practices Analyzed: Street cleaning (vacuum assist) Porous pavement Infiltration Pits Biofilters
Project Area Commercial Land Use
Project Area School Land Use
Project Area Medium Density Res. Land Use
Project Area – Source Area Delineations Residential – High Density Source Areas
Project Area – Source Area Delineations Source Areas Residential – Low Density
Project Area – Source Area Delineations Source Areas Residential – Single Family
Project Area – Source Area Delineations Commercial Source Areas
WinSLAMM Modeling Results WinSLAMM Model Comparison of Development Scenarios
WinSLAMM Model Inputs Source Areas in WinSLAMM: Roofs Disconnected Single Sidewalk Narrower Streets Conventional LID
Model Inputs WinSLAMM Road Swale Description:
WinSLAMM Model Inputs WinSLAMM Infiltration Basin Description:
WinSLAMM Modeling Results WinSLAMM Model Comparison of Development Scenarios
WinSLAMM Modeling Results WinSLAMM Model Comparison of Development Scenarios
WinSLAMM Modeling Results WinSLAMM Model Comparison of Development Scenarios* * Annual loadings from 43.2 acre Cedar Hills development