California Water Science Center


Filter Total Items: 10
Date published: March 16, 2021

Batteries Included Fortran Library (BiF-lib), version 1.0.0

Standard Fortran provides limited data type, function, and subroutine support leaving the developer to write custom code for every project. This has lead to every developer having their own internal, homemade, Fortran library for doing common operations.

Date published: November 20, 2020

DGMETA (Dissolved Gas Modeling and Environmental Tracer Analysis)

DGMETA (Dissolved Gas Modeling and Environmental Tracer Analysis) is a Microsoft Excel-based computer program that is used for modeling air-water equilibrium conditions from measurements of dissolved gases and for computing concentrations of environmental tracers that rely on air-water equilibrium model results.

Date published: April 7, 2020

MODFLOW One-Water Hydrologic Flow Model (MF-OWHM)

The MODFLOW One-Water Hydrologic Flow Model (MF-OWHM) is an integrated hydrologic model designed for the analysis of conjunctive-use management.

Date published: January 24, 2020

Groundwater Age Mixtures & Contaminant Trends Tool (GAMACTT)

Use this Groundwater Age Mixtures and Contaminant Trends Tool (GAMACTT) to explore the effects of basic aquifer properties and well configurations on groundwater age mixtures in groundwater discharge and on contaminant trends from varying nonpoint-source contaminant input scenarios.

Date published: January 15, 2020


An Excel® Workbook for Interpreting Groundwater Age Distributions from Environmental Tracer Data

Date published: April 26, 2019

Basin Characterization Model (BCM)

The Basin Characterization Model (BCM) models the interactions of climate with empirically measured landscape attributes including topography, soils, and underlying geology. It is a grid-based model that calculates the water balance for each 18-acre cell (270m resolution) in a given watershed in set time steps for the entire area. 

Date published: March 30, 2017

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

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. 

Date published: April 26, 2013

MODPATH Observation Process (MODPATH-OBS)

The MODPATH-OBS (Hanson and others, 2013) computer program is designed to calculate simulated equivalents for observations related to advective groundwater transport that can be represented in a quantitative way by using simulated particle-tracking data. 

Date published: August 27, 2012

Central Valley Hydrologic Model (CVHM)

The Central Valley Hydrologic Model (CVHM) is an extensive, detailed three-dimensional (3D) computer model of the hydrologic system of the Central Valley (Faunt, 2009). The Central Valley Hydrologic Model (CVHM) simultaneously accounts for changing water supply and demand across the landscape, and simulates surface water and groundwater flow across the entire Central Valley.

Date published: June 19, 2008


A Grid-Based, Distributed-Parameter Watershed Model to Estimate Net Infiltration Below the Root Zone