17 Works

MODPATH: A particle-tracking model for MODFLOW

David W. Pollock
MODPATH is a particle-tracking post-processing program designed to work with MODFLOW, the USGS finite-difference groundwater flow model. MODPATH version 7 is the fourth major release since its original publication.

FLASH: A Computer Program for Flow-Log Analysis of Single Holes

Frederick D. Day-Lewis, Carole D Johnson, Frederick L. Paillet & Keith J Halford
FLASH (Flow-Log Analysis of Single Holes) is a computer program for the analysis of borehole vertical flow logs. The code is based on an analytical solution for steady-state multi-layer radial flow to a borehole. The code includes options for (1) discrete fractures and (2) multi-layer aquifers. Given vertical flow profiles collected under both ambient and stressed (pumping or injection) conditions, the user can estimate fracture (or layer) transmissivities and far-field hydraulic heads. FLASH is coded...

FloPy: Python package for creating, running, and post-processing MODFLOW-based models

Mark Bakker, Vincent Post, Christian D. Langevin, Joseph D. Hughes, Jeremy White, Jeffrey Starn & Michael N Fienen
FloPy is a Python package for creating, running, and post-processing MODFLOW-based models. FloPy includes support for MODFLOW-2000, MODFLOW-2005, MODFLOW-NWT, MODFLOW-USG, and MODFLOW-LGR. Other supported MODFLOW-based models include MODPATH (version 6), MT3D, MT3D-USGS, and SEAWAT.

Software for Estimating temporal trends in environmental monitoring data

Richard A Erickson
Comparison of statistical models to recover trend estimates. This product compared different model's abilities to recover trends. The code was run on a Windows based HTCondor Flock.

QFASAR R Package: Software

Jeffrey F. Bromaghin
An implementation of Quantitative Fatty Acid Signature Analysis (QFASA) in R. QFASA is a method of estimating the diet composition of predators. The fundamental unit of information in QFASA is a fatty acid signature (signature), which is a vector of proportions describing the fatty acid composition of adipose tissue. Signature data from at least one predator and from samples of all potential prey types are required. Calibration coefficients, which adjust for the differential metabolism of...

GSFLOW: coupled groundwater and surface-water flow model

Robert S. Regan, Richard G. Niswonger, Steven L. Markstrom, David E. Prudic & Paul M. Barlow
GSFLOW is a coupled Groundwater and Surface-water FLOW model based on the integration of the USGS Precipitation-Runoff Modeling System (PRMS) and the USGS Modular Groundwater Flow Model (MODFLOW). GSFLOW was developed to simulate coupled groundwater/surface-water flow in one or more watersheds by simultaneously simulating flow across the land surface, within subsurface saturated and unsaturated materials, and within streams and lakes. Climate data consisting of measured or estimated precipitation, air temperature, and solar radiation, as well...

pyEMU: a python framework for environmental model uncertainty analysis version .01

Jeremy T. White, Michael N. Fienen & John E. Doherty
We have developed pyEMU, a python framework for Environmental Modeling Uncertainty analyses, open-source tool that is non-intrusive, easy-to-use, computationally efficient, and scalable to highly-parameterized inverse problems. The framework implements several types of linear (first-order, second-moment (FOSM)) and non-linear uncertainty analyses. The FOSM-based analyses can also be completed prior to parameter estimation to help inform important modeling decisions, such as parameterization and objective function formulation. Complete workflows for several types of FOSM-based and non-linear analyses are...

1DTempPro: A program for analysis of vertical one-dimensional (1D) temperature profiles

F.W. Koch, Emily B. Voytek, Frederick D. Day-Lewis, R. Healy, Martin Briggs, Dale Werkema & John W Lane
1DTempPro is a computer program for the analysis of one-dimensional vertical temperature profiles. The program is a graphical user interface (GUI) to the previously published USGS code VS2DH, which numerically solves the flow and heat-transport equations. The program allows users to visually calibrate VS2DH models against measured data to estimate vertical groundwater/surface-water exchange and also hydraulic conductivity for cases where hydraulic head is known. 1DTempPro is written in C# for execution in a MS Windows...

CRT: Cascade Routing Tool to Define and Visualize Flow Paths for Grid-Based Watershed Models

W.R. Henson & R.G. Niswonger
The U.S. Geological Survey Cascade Routing Tool (CRT) is a computer application for watershed models that include the coupled Groundwater and Surface-water FLOW model GSFLOW and the Precipitation-Runoff Modeling System (PRMS). CRT generates output to define cascading surface and shallow subsurface flow paths for grid-based model domains. CRT also includes an option to condition the grid-scale DEM to fill unintended swales and to provide continuous down-sloping HRUs that follow streams. CRT requires a land-surface elevation...

Data Cleaning Methodology Source Code

Brian Varela
Source code for Data Cleaning Methodology

ShakeMap Manual

Charles B. Worden
This online ShakeMap Manual (Worden and Wald, 2016), is a significant update of the original (Wald et al., 2005) ShakeMap Manual. We employ Python document generator Sphinx, with the source under GitHub version control. These web pages are rendered with the Sphinx RTD theme. A PDF version of this manual is available. ShakeMap Napa ShakeMap®, developed by the U.S. Geological Survey (USGS), facilitates communication of earthquake information beyond just magnitude and location. By rapidly mapping...

Fractured Rock Geophysical Toolbox Method Selection Tool (FRGT-MST)

F.D. Day-Lewis, Carole D Johnson, Lee D. Slater, Judith L. Robinson, John H. Williams, C.L. Boyden, Dale Werkema & John W. Lane
The FRGT-MST is an Excel-based tool for identification of geophysical methods most likely to be appropriate for project goals and site conditions. The current version of FRGT-MST is v.1.0 (January 06, 2016). This is the initial release. We envision the FRGT-MST: 1) equipping remediation professionals with a tool to understand what is likely to be realistic and cost effective when contracting geophysical services, and 2) reducing applications of geophysics with unrealistic objectives or where methods...

Visual Basic, Excel-Based Fish Population Modeling Tool�The Pallid Sturgeon Example

Edward H. Moran, Mark L. Wildhaber, Nicholas S. Green & Janice L. Albers
The model presented in this report is a spreadsheet-based model using Visual Basic for Applications within Microsoft Excel (http://dx.doi.org/10.5066/F7057D0Z) prepared in cooperation with the U.S. Army Corps of Engineers and U.S. Fish and Wildlife Service. It uses the same model structure and, initially, parameters as used by Wildhaber and others (2015) for pallid sturgeon. The difference between the model structure used for this report and that used by Wildhaber and others (2015) is that variance...

MODFLOW-NWT: a Newton Formulation for MODFLOW-2005

R.G. Niswonger, Sorab Panday & Motomu Ibaraki
The USGS MODFLOW-NWT is a Newton-Raphson formulation for MODFLOW-2005 to improve solution of unconfined groundwater-flow problems. MODFLOW-NWT is a standalone program that is intended for solving problems involving drying and rewetting nonlinearities of the unconfined groundwater-flow equation.

Groundwater Toolbox: A graphical and mapping interface for analysis of hydrologic data

Tong Zhai, Paul M. Barlow, William L. Cunningham & Mark Gray
The Groundwater Toolbox is a graphical and mapping interface for analysis of hydrologic data. The software is a customized interface built on the non-proprietary, open-source MapWindow geographic information system software in a Microsoft Windows computing environment. The Groundwater Toolbox allows for the retrieval of hydrologic time-series data (streamflow, groundwater levels, and precipitation) from the USGS National Water Information System; preprocessed meteorological data from the National Oceanic and Atmospheric Administration National Climatic Data Center also are...

Point-source to finite-fault distance conversions

C Bruce Worden & Eric M Thompson
Produce approximated finite fault distances and variance corrections given point source information, e.g., Repi (epcentral distance) to Rrup (rupture distance).

MT3D-USGS: Groundwater Solute Transport Simulator for MODFLOW

Matthew J. Tonkin, Vivek Bedekar, Eric D. Morway & Christian D. Langevin
MT3D-USGS is a USGS updated release of the groundwater solute transport code MT3DMS. MT3D-USGS includes new transport modeling capabilities to accommodate flow terms calculated by MODFLOW packages that were previously unsupported by MT3DMS and to provide greater flexibility in the simulation of solute transport and reactive solute transport.

Registration Year

  • 2016

Resource Types

  • Software