Abstract:
The two-constituent solute transport model for ground water having variable density model simulates solute transport in flowing ground water. It is applicable to two-dimensional, cross-sectional problems involving ground water with constant or variable density. The model computes changes in concentration over time caused by the processes of advective transport, hydrodynamic dispersion, mixing
... or dilution from fluid sources. The concentrations of two independent solutes can be modeled simultaneously. Temperature is assumed to be constant, but fluid density and viscosity are assumed to be a linear function of the first specified solute. If a second solute is specified, it is assumed to be of a trace amount such that it does not affect the fluid density or viscosity. The aquifer may be heterogeneous and anisotropic. The model has been used mostly in studies of either saltwater intrusion or dense contaminant plumes. The model was documented by Sanford and Konikow (1985). For a documentation of the numerical method used, see the report by Konikow and Bredehoeft (1978).
[Summary provided by the USGS.] 
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