Software

RegionGrow3D (RG3D) is a software for computing slope stability on a regional scale within a three-dimensional (3D), limit-equilibrium framework. RG3D efficiently computes discrete, 3D landslide geometries throughout a digital landscape. Potential landslide source areas are identified and grown downhill until force equilibrium is achieved.

This repository contains study materials for python programming for hydrologic applications and a focus on groundwater modeling with flopy. The materials are used in an in-person curriculum at the USGS and provided here for reference for the larger hydrologic community.

Plumeria is a one-dimensional model for wind-driven volcanic plumes. It was originally written in 2007 in Visual Basic to analyze plumes during the 2004-2008 eruption of Mount St. Helens. The version in this repository, Plumeria_wd, has been modified for crosswinds, translated to Fortran, and tested by comparing predicted with observed plume heights from multiple eruptions. It was...

This repository houses a set of Python tools to expedite the acquisition of 3DEP DEM data. These tools were designed to help geologists in the National Cooperative Geologic Mapping Program more efficiently produce high-resolution base maps and tailored derivative products that help identify and characterize geologic features. These derivatives include hillshades and slope maps, as well...

Welcome to The Bird Mercury Tool website. Please follow the guidance below to download the tool and user guide. The Bird Mercury Tool: Estimating Methylmercury Injury to Birds can be used by practitioners to help interpret injury to birds caused by methylmercury concentrations in bird tissues or diet. The dataset, statistical models, and assumptions used within this tool have been...

This release add the following major features to pfdf: * Comprehensive documentation * Raster preprocessing * Parallelization options when locating outlet basins * Windowed raster reading The release also provides minor improvements, as follows: * Raster data/nodata masks, * Improved model broadcasting options, * The Segments.in_mask and Segments.in_perimeter methods

These Python scripts download Sentinel 1 & 2 imagery for the user defined study site areas of interest (AOI). The semi-automated script iterates through a systematic file structure, reads in geospatial bounds of AOIs for each study site, and accesses Copernicus Data Base Ecosystem using the European Space Agency's Open Earth Observation system. The script then queries this system for...

The purpose of this study was to evaluate the distribution of northwestern pond turtles (Actinemys marmorata) and invasive American bullfrogs (Lithobates catesbeianus) in private timberland streams of interior northern California, USA. Fieldwork for the study occurred in 2021-2022 in Lassen, Plumas, Shasta, Tehama, and Trinity counties, California, and involved visual encounter surveys...

This repository contains R code to: 1. Simulate spatially autocorrelated count and demographic data for 10 populations using mean and process variance estimates from a long-term (1938–2011), range-wide meta-analysis of Greater Sage-Grouse (Centrocercus urophasianus) population dynamics (Taylor et al., 2012). 2. Fit a spatially interpolated integrated population model (SIIPM) to the...

Official version 1.1.0 software release of the Groundwater-Nitrate Decision Support Tool (GW-NDST) for Wisconsin. This release (v1.1.0) is matched with and described by Juckem, P.F., Corson-Dosch, N.T., Schachter, L.A., Green, C.T., Ferin, K.M., Booth, E.G., Kucharik, C.J., Austin, B.P., and Kauffman, L.J., 2024, Design and calibration of a Nitrate Decision Support Tool for Groundwater...

Climate change is expected to increase lake productivity and algal blooms and cause regime shifts, particularly in human-impacted ecosystems. However, evidence is lacking for causal relationships between climate and lake productivity or for the nonlinear dynamics needed to demonstrate regime shifts. We modeled causal effects of climate on lake chlorophyll over 34 years in 24,452 US lakes...

The USGS Satellite Tool for River Altimetry and eXtent in Alaska (SatTRAX-AK) is a Google Earth Engine application built for exploring Surface Water and Ocean Topography (SWOT) observable USGS gages reaches and Global Water Monitor (GWM) altimetry data for river surfaces. The application will run an analysis at select GWM sites to compute water extent and estimated water surface...