Characterizing Dependence of Pesticide Load in Surface Water on Precipitation and Pesticide Use for the Sacramento River Watershed

lei Guo; E.Nordmark; Frank C.SpurkockBruce R.JohnsonLinying LiJ.Marshall LeeKean S.Goh

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Characterizing Dependence of Pesticide Load in Surface Water on Precipitation and Pesticide Use for the Sacramento River Watershed

机译：Characterizing Dependence of Pesticide Load in Surface Water on Precipitation and Pesticide Use for the Sacramento River Watershed

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Transport of pesticides by surface runoff during rainfall events is a major process contributing to pesticide contamination in rivers.This study presents an empirical regression model that relates pesticide loading overtime in the Sacramento River with the precipitation and pesticide use in the Sacramento River watershed.The model closely simulated loading dynamics of diazinon,simazine,and diuron during 1991-1994 and 1997-2000 winter storm seasons.The coefficients of determination for regression ranged from 0.168 to 0.907,all were significant at <0.001.The results of this study provide strong evidence that precipitation and pesticide use are the two major environmental variables dictating the dynamics of pesticide transport into surface water in a watershed.The capability of the statistical model to provide time-series estimates on pesticide loading in rivers is unique and may be useful fortotal maximum daily load(TMDL)assessments.

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《Environmental Science & Technology: ES&T》 |2004年第14期|3842-3852|共11页
作者
lei Guo; E.Nordmark; Frank C.SpurkockBruce R.JohnsonLinying LiJ.Marshall LeeKean S.Goh;
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作者单位

Environmental Monitoring Branch,Department of Pesticide Regulation,California Environmental Protection Agency,Sacramento,California 95812-4015;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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正文语种英语
中图分类环境化学;
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Characterizing Dependence of Pesticide Load in Surface Water on Precipitation and Pesticide Use for the Sacramento River Watershed

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