MODFLOW-USG

Why MODFLOW-USG with GMS?
GMS provides a custom interface to the MODFLOW-USG model offering a simple way to set model parameters and a graphical user interface to run the model and visualize the results. Gather background data from a variety of sources from GIS to CAD and access online data from numerous databases of maps, images, and elevation data. GMS allows you to interact with models in true 3D taking advantage of optimized OpenGL graphics and to create photo-realistic renderings and animations for PowerPoint, print, and web presentations. GMS is the only MODFLOW-USG interface that supports any unstructured grid type including nested grids and grids based on triangles, rectangles, hexagons, and other cell shapes.

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MODFLOW-USG Description:
MODFLOW-USG offers the ability to create unstructured grids in order to increase model resolution around features such as rivers and wells. By varying the resolution in a groundwater model, more detailed information may be represented in areas that matter most resulting in more accurate models with quicker runtimes.

Unstructured grid types include quadtree (nested grids), voronoi (variably sized polygon), and tri-quad (triangle and quadrilateral) grids.