The grid generator will generate a default level of refinement, but the user has control on the levels of refinement desired. The software has extensive capabilities for simulating saturated unsaturated water flow and solute transport. The Richards equation is used for simulating unsaturated fluid flow. Boundary conditions can be specified and edited inter actively through the graphical interface. Direct or iterative solvers are used depending on problem size, and forward or inverse solutions may be calculated.
Heat transport is via conduction and convection with flowing water.
Solute transport includes advection-dispersion in the liquid phase and diffusion in the gas phase. Nonlinear nonequilibriurn reactions are supported for interaction between the liquid and solid phases. Linear equilibrium reactions between the gas and liquid phases are included. The integration of the software into the interface is among the most coherent and intuitive that we've seen to date . This helps to keep the user oriented.