Invited Paper
Numerical Model For Simulating Multiple Solute
Transport In Variably-saturated Soils
Author(s)
J. Simunek & M. Th. van Genuchten
Abstract
In this paper we discuss a two-dimensional model, CHAIN 2D, for simu-
lating the variably-saturated movement of water, heat, and multiple solutes
involved in sequential first-order decay reactions. The model assumes that
the solutes can reside in all three phases, i.e., liquid, solid, and gaseous.
The solute transport equations consider convective-dispersive transport in
the liquid phase, diffusion in the gaseous phase, nonlinear equilibrium or
nonequilibrium sorption, linear equilibrium volatilization, zero-order
production, and first-order degradation reactions which provide the
necessary coupling between solutes involved in the sequential first-order
decay reactions. Nonlinear sorption is described by a generalized
formulation which can be simplified to either a Fr
Keywords
Related Book
Other papers in this volume
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Code
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