GMS is a comprehensive groundwater modeling environment with GIS based graphical preprocessing tools to automate and streamline the modeling process. GMS seamlessly interfaces with MODFLOW and several other preeminent groundwater models, and provides advanced graphical features for viewing and calibrating model results GMS provides tools for every phase of a groundwater simulation including site characterization, model development, calibration, post-processing, and visualization. GMS supports a number of finite-difference and finite-element models in 2D and 3D including MODAEM, MODFLOW 2000, MODPATH, MT3DMS, RT3D, SEAM3D, FEMWATER, PEST, SEEP2D and UTEXAS. GMS can be used for a number of modeling applications including site visualization, aquifer resource studies, well field management and permitting, site contamination evaluation and cleanup, natural attenuation and bioremediation, as well as seepage and slope stability. GMS Modules The interface for GMS is divided into eleven modules. A module is provided for each of the basic data types supported by GMS. As you switch from one module to another module, the Dynamic Tool Palette and the Menus change. This allows you to focus only on the tools and commands related to the data type you wish to use in the modeling process. Switching from one module to another can be done instantaneously to facilitate the simultaneous use of several data types when necessary. TIN Module Borehole Module Solid Module 2D Mesh Module 2D Grid Module 2D Scatter Point Module 3D Mesh Module 3D Grid Module 3D Scatter Point Module Map Module GIS Module