MODFLOW-USG (UnStructured Grid version of MODFLOW) provides a significant advancement in groundwater modeling. Along with a new set of capabilities, there are several changes to the underlying MODFLOW concepts. Thus there is a need to better understand the differences and similarities between the UnStructured version of MODFLOW and traditional Structured versions of MODFLOW (including MODFLOW-2000, -2005, -NWT, -LGR). This page contains links to several resources, white papers, and multi-media demonstrations of the capabilities of MODFLOW-USG and Visual MODFLOW Flex.
Reference Materials
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What Features Do You Want in Visual MODFLOW Flex?
Hello Visual MODFLOW Flex users! We need your input on helping us prioritize features for the next release of Visual MODFLOW Flex (VMOD Flex), which …Read More »The New MODFLOW Course: Theory and Hands-On Course NGWA
Waterloo Hydrogeologic is pleased to partner with the NGWA to present “The New MODFLOW Course: Theory and Hands-On Training” JUNE 14-17, 2016 LAS VEGAS, NEVADA Course …Read More »MODFLOW-USG (UnStructured Grids): A Game Changer for Groundwater Modeling
A preview of the new MODFLOW-USG (UnStructured Grids) was unveiled by Sorab Panday and Chris Langevin at the MODFLOW and More 2011 Conference.Read More »Particle tracking for MODFLOW-USG: A demonstration of mod-PATH3DU runs using Visual MODFLOW Flex
The new particle tracking program mod-PATH3DU, developed by S.S. Papadopulos & Associates, provides a vital component for interpretation and analysis of MODFLOW-USG groundwater models. This …Read More »A logical and flexible approach to creating Quad-Based UnStructured grids using Visual MODFLOW Flex
MODFLOW-USG gives you the flexibility to focus grid resolution where it counts, using a variety of grid geometries. As mentioned in an earlier blog post, …Read More »Utilizing layer-dependent discretization to accommodate a wide variety of grid-refinement needs for MODFLOW-USG
In 2013 Visual MODFLOW Flex demonstrated the power of MODFLOW-USG through the use of Voronoi polygon unstructured grids. By focusing the grid resolution “where it …Read More »MODFLOW-USG Online Course Reaches Record High Enrollment
Waterloo Hydrogeologic hosted two successful online training courses focused on groundwater modeling with MODFLOW-USG on December 11th and 12th. This course followed the release of Visual …Read More »Case Study: MODFLOW-USG Yields 90% Reduction in Run Times for Regional Groundwater Model
One of the main benefits of MODFLOW-USG is that it is capable of achieving a high level of accuracy, with much fewer grid cells than …Read More »Visual MODFLOW Flex 2014.1 Released With Support for MODFLOW-USG (Unstructured Grids)
Waterloo Hydrogeologic is pleased to announce the release of Visual MODFLOW Flex 2014.1 which provides support for MODFLOW-USG – a new finite volume version of the …Read More »Watch: MODFLOW-USG Webinar Recordings
Yesterday marked the end of the free two-part webinar series on MODFLOW-USG (UnStructured Grids) with Wayne Hesch and guest presenter, Sorab Panday. The webinar series …Read More »MODFLOW-USG Webinar Series Announced
Waterloo Hydrogeologic is pleased to announce a free two-part webinar series on the new MODFLOW-USG (Unstructured Grids) groundwater flow simulation code. Part one will take place …Read More »Groundwater Modeling Numerical Methods: Which One Should You Use?
Those that are new to groundwater modeling are often overwhelmed with terms such as finite differences, finite elements, grid discretization and triangulation. Once you gain …Read More »Understanding MODFLOW-USG: A Comparison between Structured MODFLOW and UnStructured MODFLOW
The newly released MODFLOW-USG (UnStructured Grid version of MODFLOW) provides a significant advancement in groundwater modeling. Along with a new set of capabilities, there are …Read More »MODFLOW-USG and Voronoi Cells
Traditional versions of MODFLOW (2005, NWT, LGR) work with structured rectilinear grids that require a prescribed set of rows, columns, and layers. The new MODFLOW-USG …Read More »Generating Robust Polygonal Grids for MODFLOW-USG using Visual MODFLOW Flex
Background MODFLOW–USG (UnStructured Grids) is capable of simulating groundwater flow using a wide range of grid geometries. All of the grid information is characterized by …Read More »MODFLOW-USG Short Course at the MODFLOW & More 2013 Conference
Waterloo Hydrogeologic will be offering a 1-day short course on the theory and fundamentals of MODFLOW-USG (MODFLOW with UnStructured Grids) before the start of the …Read More »