Explore software used for all water resources applications, including general use, water quality and chemistry, groundwater, statistics and graphics, and surface water.

Filter Total Items: 111
Date published: February 19, 2018

FloPy: Python Package for Creating, Running, and Post-Processing MODFLOW-Based Models

FloPy is a Python package for creating, running, and post-processing MODFLOW-based models.

Attribution: Water Resources
Date published: January 31, 2018


The purpose of this website is to enhance the support services provided to HEC-RAS customers. The HEC-RAS website provides a number of resources, which include helping the user download software, learn how to use HEC-RAS, resolve problems, report bugs, and suggest improvements to CEIWR-HEC products and service. 

Date published: January 30, 2018

Montana StreamStats: a water-resources web application

StreamStats is a Web application that incorporates a Geographic Information System (GIS) to provide users with access to an assortment of analytical tools that are useful for a variety of water-resources planning and management purposes, and for engineering and design purposes.

Date published: January 25, 2018

SPARROW modeling: Estimating contaminant transport


What’s New: A new version of the SPARROW code is being developed in the R programming language. The advantage of R is that it is non-proprietary and does not require a license or software cost. The R – SPARROW code is now being completed and should be available early in CY18. Stay Tuned.

Date published: January 5, 2018

Chemical Mixtures Software

The chemical mixtures software is a collection of computer programs for investigating the composition, occurrence, distribution, and potential toxicity of chemical mixtures.  The software is designed to assist with selecting specific mixtures for future research, identifying the causes for the occurrence of specific mixtures, and discovering the effects of mixtures. 

Date published: December 15, 2017

MODPATH: A Particle-Tracking Model for MODFLOW

MODPATH is a particle-tracking post-processing model that computes flow paths using output from MODFLOW.

Attribution: Water Resources
Date published: November 30, 2017

Stochastic Empirical Loading and Dilution Model (SELDM)

SELDM is a database application where users can easily create and run highway-runoff simulations. SELDM simulates storm flows, concentrations, and loads. SELDM calculates the risk of exceeding water-quality criteria with and without user-defined BMPs. SELDM calculates annual runoff loads and is able to do a simple annual lake-loading analysis.

Date published: November 9, 2017

PHREEQC Version 3

PHREEQC Version 3 is a computer program for speciation, batch-reaction, one-Ddmensional transport, and inverse geochemical calculations.

Attribution: Water Resources
Date published: November 2, 2017

CE-QUAL-W2 - Hydrodynamic and Water Quality Model

CE-QUAL-W2 is a water quality and hydrodynamic model in 2D (longitudinal-vertical) for rivers, estuaries, lakes, reservoirs and river basin systems. W2 models basic eutrophication processes such as temperature-nutrient-algae-dissolved oxygen-organic matter and sediment relationships.

Date published: October 27, 2017

MODFLOW-USG: An Unstructured Grid Version of MODFLOW for Simulating Groundwater Flow and Tightly Coupled Processes Using a Control Volume Finite-Difference Formulation

MODFLOW-USG is an unstructured grid version of MODFLOW for simulating groundwater flow and tightly-coupled processes using a control volume finite-difference formulation.

Attribution: Water Resources
Date published: July 26, 2017

API - USGS Search

The U.S. Geological Survey Search API is a custom JavaScript library useful for creating a location search widget in a webpage, typically in conjunction with a web map. The widget connects to a database created for the API, or Application-Programming Interface, to quickly find and suggest locations as the user enters text to navigate to...

Date published: June 20, 2017

GCLAS (Graphical Constituent Loading Analysis System)

GCLAS is a program designed primarily to compute daily and annual loadings of constituents transported in streamflow.