The model was written as an educational tool. Water movement is modeled using Richards equation.
Chemical transport is modeled with the convection-dispersion equation.
The user defines soil properties, soil orientation, initial conditions, and boundary conditions using interactive screens. The partial differential equations are solved for the specified system using finite difference techniques. Results can be viewed in graphical and tabular forms. A user's manual is provided which details the equations solved and limitations of the model as well as operating instructions. A set of numerical experiments is provided to illustrate important unsaturated flow and transport concepts to the user.