Software
An official USGS software project is code reviewed and approved at the bureau-level for distribution.
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Co-occurance Simulation Modeling Co-occurance Simulation Modeling
R-based script used to simulate patterns of co-occurrence among two hypothetical species under patterns of avoidance, aggregation, and independence when the closure assumption is met or not, analyze simulated patterns with two-species occupancy models, and summarize the results.
ToxMixtures: A package to explore toxicity due to chemical mixtures ToxMixtures: A package to explore toxicity due to chemical mixtures
The ToxMixtures R-package includes a set of functions to analyze, visualize, and organize measured chemical concentration data as it relates to chemical mixtures. ToxMixtures combines outputs from the R-package toxEval with open access sources on molecular biology to provide information on potential biological effects of chemicals detected in environmental matrices. To use ToxMixtures...
Culvert Analysis Program (CAP) version 2021.0.0 Culvert Analysis Program (CAP) version 2021.0.0
The culvert analysis program (CAP) version 2021 updates and corrects know errors in standalone versions 98-07c or earlier and iRIC version 3.X or earlier.
Model Viewer for MODFLOW 6 Graphical User Interface 1.0.0 Software Release Model Viewer for MODFLOW 6 Graphical User Interface 1.0.0 Software Release
Model Viewer, a graphical user interface for three-dimensional visualization of ground-water results, has been updated to support reading the results from the U.S. Geological Survey’s MODFLOW 6 program. Two examples are included. The example ex-gwf-csub-p04 illustrates the use of the new DIS6 grid format. The second example ex-gwf-disvmesh demonstrates the ability to load and display the...
GSFLOW: Coupled Groundwater and Surface-Water Flow Model, version 2.2.1 GSFLOW: Coupled Groundwater and Surface-Water Flow Model, version 2.2.1
GSFLOW is a coupled Groundwater and Surface-Water Flow model based on the integration of the U.S. Geological Survey Precipitation-Runoff Modeling System (PRMS; Markstrom and others, 2015) and the U.S. Geological Survey Modular Groundwater Flow Model (MODFLOW-2005, Harbaugh, 2005; MODFLOW-NWT, Niswonger and others, 2011). In addition to the basic PRMS and MODFLOW simulation methods...
Modeling population viability of gopher tortoises across the species range Modeling population viability of gopher tortoises across the species range
The code runs a population viability assessment simulation and analyzes the simulated output for Gopher Tortoise Metapopulations in the South Eastern US.