Recent Developments and Future Directions for MT3DMS and Related Transport Codes
نویسنده
چکیده
Introduction MT3DMS is a three-dimensional (3D) multispecies contaminant transport model with a modular structure to permit simulation of solute transport processes independently or jointly (Zheng and Wang 1999; Zheng 2009). MT3DMS interfaces directly with the U.S. Geological Survey’s finite-difference ground water flow model, MODFLOW, for the flow solution, and supports all the hydrologic and discretization features of MODFLOW (McDonald and Harbaugh 1988; Harbaugh et al. 2000; Harbaugh 2005). MT3DMS is unique in that it contains several transport solution techniques in a single code, including the fully implicit finite-difference method (FDM), the particle-tracking based method of characteristics (MOC) and its variants, and a third-order total-variation-diminishing (TVD) scheme that conserves mass while limiting numerical dispersion and artificial oscillation. Since its first release in 1990 as MT3D for singlespecies mass transport (Zheng 1990), MT3DMS has been widely used in research projects and practical field applications. In recent years, continuing development efforts have significantly expanded the simulation capabilities of MT3DMS through new extensions and related codes. This column provides a brief overview of the recent developments and future directions in the MT3DMS family of transport-modeling tools.
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