3/21/2021 0 Comments Visual Modflow Flex
You can copy, modify, distribute, and perform the work, even for commercial purposes, all without asking permission.With time, growing interest in surface and groundwater interactions, local refinement with nested and unstructured grids, karst groundwater flow, solute transport, and saltwater intrusion, has led to the development of numerous MODFLOW versions.Although these MODFLOW versions are often based on the core MODFLOW version (previously MODFLOW-2005 ), there are often incompatibilities that restrict their use with other MODFLOW versions.In many cases, development of these alternative MODFLOW versions has been challenging due to the underlying program structure, which was designed for the simulation of a single groundwater flow model using a regular MODFLOW grid consisting of layers, rows, and columns.
This type of layered grid can be represented using the Discretization by Vertices (DISV) Package in MODFLOW 6. This version of MODFLOW is labeled with a 6 because it is the sixth core version of MODFLOW to be released by the USGS (previous core versions were released in 1984, 1988, 1996, 2000, and 2005). In the new design, any number of models can be included in a simulation. These models can be independent of one another with no interaction, they can exchange information with one another, or they can be tightly coupled at the matrix level by adding them to the same numerical solution. Transfer of information between models is isolated to exchange objects, which allow models to be developed and used independently of one another. Within this new framework, a regional-scale groundwater model may be coupled with multiple local-scale groundwater models. The framework naturally allows for future extensions to include the simulation of solute transport. The GWF Model is divided into packages, as was done in previous MODFLOW versions. A package is the part of the model that deals with a single aspect of simulation. The GWF Model also has packages for obtaining and controlling output from the model. The XT3D option extends the capabilities of MODFLOW by enabling simulation of fully three-dimensional anisotropy on regular or irregular grids in a way that properly takes into account the full, three-dimensional hydraulic conductivity tensor. It can also improve the accuracy of groundwater flow simulations in cases in which the model grid violates certain geometric requirements. Thus, the XT3D option is an alternative to the Ghost-Node Correction (GNC) Package, which was developed for MODFLOW-USG. Within package input files, information is divided into blocks and informative keywords are used to label numeric data and activate options. This new input structure was designed to make it easier for users to adjust simulation options in an intuitive manner, reduce user input errors, and allow new capabilities to be added without causing problems with backward compatibility. This program is based on ZONEBUDGET for MODFLOW-2000 and MODFLOW-2005. ZONEBUDGET for MODFLOW 6 is included in the MODFLOW 6 release. Visual Modflow Flex Software Versions BelowThe software versions below are provided online for historical reference only, and the pages may contain outdated information or broken links. Visual Modflow Flex Install As ManyUsers can download and install as many copies of the software as they need.
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