Unsaturated physical non-equilibrium contaminant transport modeling using modified FEMWATER

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Abstract

The unsaturated soil zones beneath the earth surface are vulnerable to several types of harmful and toxic contaminant movements due to various natural and anthropogenic interventions. The convective-dispersive equation, which is traditionally used to describe the contaminant movement in porous media, has drawbacks of prediction in contaminant concentrations that are influenced by physical non-equilibrium that may exist due to presence of mobile and immobile liquids in the void spaces. We attempt in this paper to analyze the influence of physical non-equilibrium in pore water on acid mine drainage (AMD) through unsaturated soils. The United States-Environmental Protection Agency (US-EPA) developed finite-element software FEMWATER, which solves the liquid flow and contaminant specie transport using finite-element methods, is modified to incorporate features of physical non-equilibrium in contaminant transport due to AMD.

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Someswaran, R., & Kartha, S. A. (2017). Unsaturated physical non-equilibrium contaminant transport modeling using modified FEMWATER. Lecture Notes in Mechanical Engineering, 1163–1170. https://doi.org/10.1007/978-81-322-2743-4_110

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