Numerical Model Parameters for Simulation of Contaminant Transport

The use of models to assess the risk to the subsurface environment from contaminants isbecoming increasingly popular and a wide range of modelling software is readily available.Inconsistent and inappropriate approaches to modelling can make the assessment difficult and mayrender the results invalid. The development of a conceptual model involves a number of assumptionsregarding system behaviour. The assessment must take these assumptions and uncertainties intoaccount and understand how they could influence the predicted results. This paper outlines the fate andtransport processes, numerical models, and the model parameters required for simulation ofcontaminant transport. It will provide guidance on good practice in the development of conceptualmodels and application of mathematical models to contaminant transport problems.