Improved Well Modeling Tools for Unsaturated Flow Pump-and-Treat Remediation Studies

Fred Tracy, Barbara Donnell, Stacy Howington, John Peters & Fred Tracy
Many Department of Defense military sites and Environmental Protection Agency superfund sites benefit from pump-and-treat systems for their remediation. One of the ways used to determine the effectiveness of a pump-and-treat system is by using a groundwater finite element method program to compute flow patterns from proposed well placement. As the governing Richards’ equation for unsaturated flow is highly nonlinear, the finite element discretization often has trouble converging. This is especially true when (1) a...
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