Groundwater Contamination Investigations. Nuclear Waste Subsurface Storage Program. The latter approach is appropriate for situations where the user is interested in predicting water-table position and flow rates, but is not concerned with moisture movement in the unsaturated zone. The contaminant transport simulation can account for advection, hydrodynamic dispersion, linear equilibrium sorption, and first-order degradation. The code is delivered with complete documentation and user's manual.
Technical support is available.
The unique feature of VAM3D is its ability to treat 3-D problems in an efficient manner. The finite element method is used to obtain a numerical approximation of a given problem. The region of interest is discretized using simple rectangular or curvilinear prism elements. Such elements are simple to work with and their matrices can be easily computed using efficient influence-coefficient formulas. Nonlinearities of the variably saturated flow problem are treated using the Picard iterative scheme or the Newton-Raphson linearization.