Our new USG-Transport version 2.3.0 can be found here: https://www.gsienv.com/product/modflow-usg and includes changes that make the code more convenient to use with available compilers and FloPy tools. Two notable ones include:
- The MULTIFILE option writes binary concentrations and solute masses on separate files for each species.
- The density storage term due to solute mass is added to the other storage terms in the binary file.
This version also includes some bug fixes and updates to the documentation. This version release also includes the datasets for the example problems listed in the document. The ReadMe file included with the zip-file indicates the updates.
Major features of USG-Transport (USGT) include:
- Structured and unstructured grid support
- Connected linear network (CLNs) for simulating wells, pipes, streams, and wetlands using a variety of flow formulations (Laminar, Mannings, Hazen-Williams, Darcy-Weisbach)
- Saturated-Unsaturated flow with 3-D Richards Equation
- Multicomponent transport with chain decay
- PFAS transport in vadose and saturated zones
- Heat transport in vadose and saturated zones including with Borehole Heat Exchangers (BHEs)
- Density-dependent flow and transport
- PHREEQC integration* – Available as a separate executable on GSIs website
- Many convenient features to assist modeler and speed up model runtimes and pre/postprocessing
- Supported by GUIs such as Groundwater Vistas
