Visual MODFLOW Flex allows you to translate your conceptual model to one or more numerical models that will run in a groundwater modeling engine. Finite difference and finite control volume models can be run and analyzed within the Visual MODFLOW Flex environment, while finite element models are exported to run in FEFLOW. During translation, Visual MODFLOW Flex automatically populates the specified grid or mesh with the defined geological formations, boundary conditions, and property zone attributes, and creates the necessary input files for loading into your desired simulator.
Separate workflows will be generated every time a conceptual model is converted into a numerical model. Structured finite difference grids (which work with the following engines: MODFLOW-2000, -2005, -NWT, -LGR, - SURFACT, SEAWAT, MT3DMS, and RT3D) are converted to the numerical workflow, while unstructured finite control volume grids are converted to the unstructured grid USG workflow. In each workflow, you can view/edit the properties and boundaries on the numerical grid, then translate and run a groundwater modeling engine and view the results.
For finite element models, Visual MODFLOW Flex will generate the .FEM problem file for loading into FEFLOW. (Note: FEFLOW v.5.4 or later is required for opening and running FEFLOW models)
This chapter walks you through the steps involved in translating a conceptual model to a numerical model, and includes information on the following topics: