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() The Effect Of BMP Technology and Public Education on the Water Quality of Dry Weather Runoff.

Schiff, K1, Tiefenthaler, L1, 1 So Cal Coastal Water Research Project, Westminster, CA, USA

ABSTRACT- Urban runoff is one of the largest contributors of pollutants to impaired surface waters in the United States, yet much is left to learn about effectiveness of potential best management practices (BMPs) to improve water quality. The goal of this study was to quantify the effectiveness of a technological BMP compared to public education as a BMP. The technological BMP consisted of a new evapotranspiration (ET) sprinkler controller that automatically changes sprinkler timing based on weather conditions using remotely controlled radio signals at a nearby weather station. Water quality (nutrients, trace metals, bacteria, pesticides, and toxicity) was measured every two weeks for six months at five similar residential neighborhoods, then the technology plus education or education only treatments were applied to one neighborhood each, and measurements continued for another year. At the end of one year post intervention, there was virtually no difference in concentrations or pollutant flux over time. The technological and education treatments provided no statistically significant increase or decrease in water quality following the intervention. The lack of large differences in water quality was compounded by large variability among measurements within a neighborhood over time.

Key words: BMP, Urban runoff, Public education

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