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Analytical Model for 3D Solute Transport of Sequentially Decaying Species with Dual Porosity, Sorption, and Time-Varying Source

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APTIM Authors/Contributors

  • Tomas Perina, Project Manager, Environmental Services


U.S. Environmental Protection Agency (EPA) and its contractors performing oversight at Superfund Sites review numerical models developed to simulate contaminant transport and often could use an analytical solute transport model to perform checks on the numerical model results. An analytical transport model does not require spatial and temporal discretization of the model domain and a separate groundwater flow model, is not affected by numerical dispersion, and is easy to set up. The role of an analytical model in Superfund oversight is to simulate the general plume behavior and guide the development of, and provide a check for, a more detailed and complex numerical solute transport model. However, a practical modeling tool based on 3-D analytical solute transport model is not publicly available. EPA tasked APTIM to develop an analytical model for solute transport in a three-dimensional aquifer of finite thickness with uniform flow, dual porosity, sorption, sequential decay, and finite-extent source with specified time-variable concentration.

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