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Evaluation of Best Management Practices for Urban Stormwater Management

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Abstract:

The Clean Water Act, that established water quality standards for surface waters in the USA, mandates identifying impaired water bodies, and implementing Total Maximum Daily Loads (TMDLs). In response, Best Management Practices (BMPs) will be implemented to help to comply with the TMDL requirements. This study evaluated the expected performance of the proposed BMPs of the stormwater clean up projects that will be funded by Proposition O in Los Angeles and their effectiveness to mitigate stormwater pollution for meeting the TMDL requirements. The results show that several projects can make important contributions to reduce pollutant loads by up to 13% of mass loads from each watershed. Our watershed scale approach emphasizes the importance of regional BMPs or integration of decentralized local BMPs in a coherent manner to meet TMDL requirements because the impact of the projects with the large drainage area had the greatest impact on receiving water quality. Our analysis suggests the need for a systems approach to watershed and BMP performance, and provides an example for the approach for the application in other areas and future plans.

Document Type: Research Article

DOI: https://doi.org/10.2175/193864708788809077

Publication date: 2008-01-01

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