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Figure 35. Schematic cross-section showing effects of pumping and generation of a cone of depression in an unconfined aquifer between a lake and a stream. Pumping and the ensuing cone of depression reverse the hydraulic gradient from pre-development (A) and induce flow from the stream into the groundwater system and to the well (B).
Originally uploaded in Integrate:Teaching for Sustainability:InTeGrate Modules:Water Science and Society:Student Materials.

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Source USGS: Ground water in the Great Lakes Basin: the case of southeastern Wisconsin.
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