ANALYTICAL AND NUMERICAL MODELING OF PHYSICAL AND CHEMICAL PROCESSES IN THE VADOSE ZONE

摘要

A large number of models for simulating water flow and solute transport in the unsaturated zone are now used for a wide range of applications in research, management, and risk assessment of subsurface systems. Many models of varying degree of complexity and dimensionality have been developed during the past several decades to quantify the basic physical and chemical processes affecting water flow and contaminant transport in the unsaturated zone. Modeling approaches range from relatively simple analytical and semi-analytical solutions, to complex numerical codes. In this paper a brief overview of more widely used analytical and numerical models is given. Some typical problems in which the numerical codes have been applied are also identified.