MODFLOW-USG
The facts below are what the maker publishes about MODFLOW-USG, checked and dated. Our editors have not written about it yet.
Plans and prices
From MODFLOW-USG's own pricing page, checked 14 Nov 2026.
| Plan | Price | What it gives you |
|---|---|---|
| MODFLOW-USG | Free | Current version 1.5; source code, user guides, and example problems |
The facts
Each one read from MODFLOW-USG's own pages, with the date it was checked.
What it does
- Connected Linear Network
- The CLN Process can simulate multi-node wells, karst conduits, and tile drains, and is tightly coupled to GWF.checked 14 Nov 2026
- Download
- The USGS download page lists version 1.5 and provides links to the release notes, program, source code, user guides, and examples.checked 14 Nov 2026
- Ghost Node Correction
- The GNC Package uses interpolated heads between connected cells to improve accuracy for irregular or nested grids.checked 14 Nov 2026
- Grid resolution
- Grid design can focus resolution near rivers and wells or subdivide layers to better represent hydrostratigraphic units.checked 14 Nov 2026
- Grid types
- It supports structured and unstructured grids, including nested grids and grids built from several cell shapes.checked 14 Nov 2026
- Groundwater flow process
- The GWF Process is based on the GWF Process in MODFLOW-2005.checked 14 Nov 2026
- Newton-Raphson
- An optional Newton-Raphson formulation can improve convergence and avoid cell drying and rewetting problems.checked 14 Nov 2026
- Numerical formulation
- Its control-volume finite-difference formulation allows a cell to connect to an arbitrary number of adjacent cells.checked 14 Nov 2026
- Purpose
- MODFLOW-USG simulates groundwater flow and tightly coupled processes.checked 14 Nov 2026
- Related utility
- GRIDGEN is a utility for creating layered quadtree grids for MODFLOW-USG.checked 14 Nov 2026
- Solver
- MODFLOW-USG replaces the existing MODFLOW solvers with a Sparse Matrix Solver package developed for the software.checked 14 Nov 2026
- Solver methods
- The SMS Package offers nonlinear solution methods and symmetric and asymmetric linear solution schemes.checked 14 Nov 2026
- Support contact
- The listed contact is the USGS MODFLOW Team at [email protected].checked 14 Nov 2026
- Support status
- The USGS says superseded versions are not actively supported; the page does not state that this applies to the current release.checked 14 Nov 2026