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Presented by: James Bachhuber PH Caroline Burger PE AECOM Madison, WI

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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Presented by: James Bachhuber PH Caroline Burger PE AECOM Madison, WI

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  1. Using WinSLAMM For Stormwater Retrofit in Urban EnvironmentsAugust 22, 2011StormCon 2011, Anaheim, CA Presented by: James Bachhuber PH Caroline Burger PE AECOM Madison, WI

  2. Dense Urban Land Uses Require Stormwater Retrofitting • Open space is very limited • Land values are very high • Treatment measures have higher safety & aesthetic requirements

  3. 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

  4. 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

  5. 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

  6. Overview of Santa Monica Stormwater Study Stormwater Practices Analyzed: Street cleaning (vacuum assist) Porous pavement Infiltration Pits Biofilters

  7. Project Area – Land Use

  8. Project Area Commercial Land Use

  9. Project Area School Land Use

  10. Project Area Medium Density Res. Land Use

  11. Project Area – Source Area Delineations Residential – High Density Source Areas

  12. Project Area – Source Area Delineations Source Areas Residential – Low Density

  13. Project Area – Source Area Delineations Source Areas Residential – Single Family

  14. Project Area – Source Area Delineations Commercial Source Areas

  15. Project Area – Source Areas

  16. WinSLAMM Modeling Results WinSLAMM Model Comparison of Development Scenarios

  17. WinSLAMM Model Inputs Source Areas in WinSLAMM: Roofs Disconnected Single Sidewalk Narrower Streets Conventional LID

  18. Model Inputs WinSLAMM Road Swale Description:

  19. WinSLAMM Model Inputs WinSLAMM Infiltration Basin Description:

  20. WinSLAMM Modeling Results WinSLAMM Model Comparison of Development Scenarios

  21. WinSLAMM Modeling Results WinSLAMM Model Comparison of Development Scenarios

  22. WinSLAMM Modeling Results WinSLAMM Model Comparison of Development Scenarios* * Annual loadings from 43.2 acre Cedar Hills development

  23. Questions / Discussion

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