MT3DMS A Modular Three-Dimensional Multispecies Transport Model
for Simulation of Advection, Dispersion, and Chemical Reactions
of Contaminants in Groundwater Systems
A Progress Report
to Waterways Experiment Station
U.S. Army Corps of Engineers
MT3DMS
A
Modular Three-Dimensional Multispecies Transport Model
for Simulation of Advection,
Dispersion, and Chemical Reactions
of Contaminants in Groundwater Systems
A Progress
Report
to Waterways Experiment Station
U.S. Army Corps of Engineers
Chunmiao
Zheng, Principal Investigator,
P. Patrick Wang and T.Z. Mai
The MT3D contaminant transport model was originally developed by the Principal Investigator at S. S. Papadopulos & Associates, Inc. and subsequently documented for the Robert S. Kerr Environmental Research Laboratory of the U.S. Environmental Protection Agency (USEPA) in Ada, Oklahoma. Since the initial release in early 1990, MT3D has become one of the most commonly used contaminant transport models with which other transport codes are often compared. The existence of MT3D and its availability in public domain has benefited the government agencies and private sectors working for prevention and mitigation of groundwater contamination problems.
The USEPA version of the MT3D code was selected by the U. S. Army Engineer Waterways Experiment Station (WES) as part of the Department of Defense Groundwater Modeling System (GMS). The primary objectives for the first phase of this project are to 1) develop MT3D into a multi-species code for linking with other bioreactive and geochemical models, 2) add a higher order finite-difference scheme that is mass conservative but without excessive numerical dispersion and artificial oscillations, and 3) implement an implicit matrix solver to remove any stability constraints as needed. The first phase of work has been completed and is described in the subsequent sections. Additional work for the second phase of the project is underway to add a new interface to a finite-element flow model such as FEMWATE, and to include a first-order reversible reaction that can be applied to model non-equilibrium sorption, NAPL dissolution, and mass transfer between "mobile" and "immobile" domains.