The U.S. Army, in partnership with the U.S. Environmental Protection Agency, the U.S. Nuclear Regulatory Commission and academic partners, has developed the DoD Groundwater Modeling System. The GMS provides an integrated and comprehensive computational environment for simulating subsurface flow, contaminant fate/transport, and the efficacy and design of remediation systems.

GMS integrates and simplifies the process of groundwater flow and transport modeling by bringing together all of the tools needed to complete a successful study. GMS provides a comprehensive graphical environment for numerical modeling, tools for site characterization, model conceptualization, mesh and grid generation, geostatistics, and sophisticated tools for graphical visualization.

Several types of models are supported by GMS. The current version of GMS provides a complete interface for the codes ADH, FEMWATER, MODAEM, MODFLOW, MODPATH, MT3D, RT3D, SEAM 3D, SEEP2D, UTEXAS, and WASH123D. The parameter estimation code PEST and the geostatistic code T-PROGS are also supported. Additional tools and interfaces for models are being designed in an on-going development process so stay tuned for more features.