Groundwater Vulnerability to Pesticides: Statistical Approaches

Groundwater vulnerability to pesticides is the potential for contamination of groundwater by pesticides from a nonpoint source or aerially distributed point sources. Due to widespread pesticide use and detection in groundwater, assessments that evaluate and estimate pesticide vulnerability have increasingly proven valuable during decisions regarding groundwater management, conservation, and remediation because of the significant costs of such actions. To predict groundwater vulnerability and understand factors that affect the transport of pesticides to groundwater resources, a variety of approaches have been developed that are broadly classified into three general categories: (1) overlay and index, (2) statistically based, and (3) process based. Often the selection of an appropriate approach for assessing groundwater vulnerability to pesticides is determined by the type and scale of the problem and by the available resources. This article provides an overview of the approaches and methods of evaluation for assessing groundwater vulnerability to pesticides. Keywords: vulnerability; pesticides; groundwater; nonpoint source contamination

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