Field Comparison of Three Mass Transport Models

Abstract

Comparable results are obtained from three mass transport models used to predict the location of a chromium plume in an aquifer. The models are an analytical solution, a finite element formulation, and a method of characteristics formulation. Considering the modeling uncertainties in field applications, costs, and required effort, analytical models are found to be most effective at this site. The finite element and method of characteristics numerical formulations are capable of incorporating many aquifer complexities, but with much greater effort. The Peclet number criterion appears to be critical and must be carefully evaluated before using the finite element model.