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/Visual MODFLOW Flex FAQ

How do I know which modules are supported in the Flex interface, and which are only available in the Classic interface?

2019-05-23T08:02:22-05:00October 19th, 2016|

We are working hard to incorporate all Classic interface components in Flex. While most features that users require are now available in the Flex interface, there are still a few features that are not yet available. The best summary of which features are available only in the Classic interface is the features list on our Interface [...]

Does Visual MODFLOW support MODFLOW-NWT?

2019-05-23T08:06:46-05:00October 19th, 2016|

Yes, the Visual MODFLOW Flex interface supports MODFLOW-NWT package, a version of MODFLOW which provides enhanced capabilities for solving problems involving drying and rewetting non-linearities of the unconfined groundwater flow equation.

Does Visual MODFLOW Flex support parallel processing?

2019-05-23T08:08:42-05:00October 19th, 2016|

If your computer contains multiple processors, or dual core processors, you can leverage the power of parallel processing for your flow simulations using Visual MODFLOW Flex simulations using PCG, WHS, or SAMG solvers can be solved over multiple processors reducing the simulation run time. Note that the parallel/multi-core version of the SAMG solver is only available [...]

Does Visual MODFLOW Flex support SAMG v.2?

2019-05-23T08:09:42-05:00October 19th, 2016|

The latest version of Visual MODFLOW Flex supports SAMG v4. This version of the SAMG solver is dramatically faster than its predecessors, and is ideally suited for multi-layered models with heterogeneous properties. The single core-version is available with Professional Edition of Visual MODFLOW Flex, while multi-core version is available with the Premium Edition of Visual MODFLOW [...]

I’m trying to install Visual MODFLOW Flex, however I receive an error that “Installer is not valid”. What should I do?

2019-05-23T08:13:29-05:00October 19th, 2016|

This issue can happen if the entire installer did not get downloaded, this can happen if the internet connection time out during the download. Please check the installer size as it should be about 530 MB. We would recommend downloading the software again, in the event of having a downloaded file size less than 530 MB. [...]


2016-10-19T18:38:02-05:00October 19th, 2016|

MODFLOW-USG is a new version of the MODFLOW groundwater flow simulation code developed by the United States Geological Survey (USGS) which uses unstructured grids instead of rectilinear grids to discretize the model domain.

What is an unstructured grid? How is it different than a structured grid used in MODFLOW-2005?

2019-05-23T12:23:24-05:00October 19th, 2016|

An unstructured grid is made up of triangular, rectangular or other polygon shaped geometries individually or in combination to discretize the groundwater model domain. This is in contrast to previous versions of MODFLOW, including MODFLOW-2005 which uses structured, rectilinear grids. Unstructured grids require the use of the finite volume method whereas traditional structured grids are used [...]