Software

MODFLOW 6 is presently the core MODFLOW version distributed by the USGS, but MODFLOW-2005 (the previous core version) is still actively maintained and supported. MODFLOW-2005 simulates steady and nonsteady flow in an irregularly shaped flow system in which aquifer layers can be confined, unconfined, or a combination of confined and unconfined.

The Point-Source Load Estimation Tool (PSLoadEsT) provides a user-friendly interface for generating reproducible load calculations for point source dischargers while managing common data challenges including duplicates, incompatible input tables, and incomplete or missing nutrient concentration or effluent flow data. Maintaining a consistent method across an entire study area is...

The Surrogate Analysis and Index Developer (SAID) tool is a stand-alone tool to assist in the creation of ordinary least squares (OLS) regression models by providing visual and quantitative diagnostics to the user.

MF2KtoMF05UC is a program to convert MODFLOW-2000 files to MODFLOW-2005 and UCODE_2005 files.

MODFLOW Data Extractor is a program for extracting data from formatted and labeled MODFLOW head or drawdown files from MODFLOW-GWT concentration or velocity files.

Evaluation of measured concentration data using the ToxCast high-throughput screening database or a user-defined set of concentration benchmarks.

Wellfootprint computes a raster map of groundwater withdrawals relative to a user-defined "Depth-Rate Index" (DRI), such as a recharge rate. Dividing each well's withdrawal rate by the length per time DRI yields an area for display for each well's 'footprint' as a circle around each well. Symbols for closely spaced wells are merged to visualize the combined withdrawals eq

VS2DI is a graphical software package for simulating fluid flow and solute or energy transport in variably saturated porous media.

The Ground-Water Transport (GWT) Process for MODFLOW-2000 (mf2k) provides the capability to simulate three-dimensional solute transport. The GWT Process is based on the previously documented MOC3D model, which was integrated with MODFLOW-96. This data release includes compiled versions of the software, source code, documentation, and the input and output for several test cases.

The Water, Energy, and Biogeochemical Model (WEBMOD) uses the framework of the U.S. Geological Survey (USGS) Modular Modeling System (MMS) to simulate fluxes of water and solutes through watersheds. WEBMOD divides watersheds into model response units (MRU) where fluxes and reactions are simulated for several hillslope reservoir types.

Groundwater Transport Process (GWT) is a three-dimensional ground-water flow and solute-transport model integrated with MODFLOW-2000.

MoisturEC is an R-based GUI used to combine electrical conductivity (EC) data with point moisture measurements for an updated moisture estimate capitalizing on the accuracy of point moisture measurements and the spatial coverage of EC data.