Pollutant loadings generated by nonpoint sources in the Santa Monica Bay Drainage Basin: A case study
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The Santa Monica Bay provides a number of beneficial uses. To protect these, best management practices that control urban runoff should be utilized. In order to determine the types of best management practices to be used, an estimation of nonpoint source pollutant loads generated by the Santa Monica Drainage Basin is needed. Local land use, runoff, and chemical data were used to estimate pollutant loads from nonpoint source pollution and pollutant loads by land use in three subbasins of the Santa Monica Drainage Basin: namely, Ballona Creek, Malibu Creek, and Topanga Creek. The time period of available data was May 1988 to May 1990.
The study found that (1) nonpoint source pollutant loads may be derived from local data, (2) pollutant loads by land use could not be derived because of lack of data, (3) an evaluation of seasonal pollutant loads fails to show significant trends.
It is possible to evaluate pollutant loads that need control by best management practices in the Santa Monica Bay Drainage Basin by utilizing the pollutant load estimates of this study with pollutant impacts to beneficial uses.
Key wordsNonpoint source pollutants BMPs best management practices
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