USGS Washington Water Science Center
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Knowing the interactions of ground water and river water can help reduce the fluctuation of water supplies in alluvial (sediment-deposit) river basins.
To develop general principles of these interactions in order to identify and analyze them, the USGS is reviewing the results of the numerous studies of these interactions in Pacific Northwest basins. The review will describe common geologic aspects that control the interactions and will evaluate techniques used to analyze how the interactions affect ground-water recharge and maintenance of baseflow in rivers.