Long-Term Objectives

1. Determine the soil and hydrologic influences on subsurface movement of pesticides to streams.

2. Elucidate dissipation factors for pesticides in a Coastal Plain stream.

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Short-Term Objectives

1. Instrument the stream with several automatic samplers and install five wells for ground water monitoring above and near the stream.

2. Develop the laboratory methodology for analysis of herbicide metabolites in water and sediment.

Accomplishments

New Project.

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Significance

Pesticide contamination of streams adjacent to agricultural fields in the Coastal Plain may impact the aquatic ecosystem depending on timing and concentration. During work on another project, a tributary to Herrings Marsh Run was found to have consistently elevated levels of herbicides which nearly disappeared downstream. Neither the source of contamination nor the dissipation factors are known at this time. We will study the environmental fate of pesticides in a typical Coastal Plain stream as well as possible ground water connections. The information will be used to refine simulation models currently being evaluated for several projects.

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Future Plans

New project.

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