Abstract

 The Environmental Fluid Dynamics Code (EFDC) is a general purposed multi-dimensional surface water modeling system, which includes hydrodynamic, sediment transport, sorptive contaminant transport and eutrophication components. The presentation will give an overview of the EFDC model's sediment and contaminant transport processes including sediment deposition, re-suspension, bed armoring and consolidation and the coupled fluxes of sorptive contaminants including a three-phase partitioning formulation. The role of model validation, independent of model calibration and verification for specific field scale applications such as TMDL development and simulation of remedial action alternatives, will be discussed. A number of analytical solutions and laboratory scale experiments of relevant sediment and sorptive contaminant processes will be described and the results of corresponding model simulations will be presented and discussed.