understanding the relationship of various physical, chemical, and biological processes. Applied Contaminant Transport Modeling is the first resource designed to provide coverage of the discipline' s basic principles, including the theories behind solute transport in groundwater, common numerical techniques for solving transport equations, and step-by-step guidance on the development and use of field-scale modeling. The Second Edition incorporates recent advances in contaminant transport theory and simulation techniques, adding the following to the original text: * An expanded discussion of the role of aquifer heterogeneity in controlling solute transport * A new section on the dual-domain mass transfer approach as an alternative to the classical advection-dispersion model * Additional chemical processes and reactions in the discussion of reactive transport * A discussion of the TVD (total-variation-diminishing) approach totransport solution * An entirely new Part III containing two chapters on simulation of flow and transport under variable water density and under variable saturation, respectively, and a third chapter on the use of the simulation-optimization approach in remediation