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# Hydrologic Modeling

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The USGS has been a leader in the development of hydrologic and geochemical simulation models since the 1960's. USGS models are widely used to predict responses of hydrologic systems to changing stresses, such as increases in precipitation or ground-water pumping rates, as well as to predict the fate and movement of solutes and contaminants in water.

### Hydrologic Modeling Software

USGS models are widely used to predict responses of hydrologic systems to changing stresses, as well as to predict the fate and movement of solutes and contaminants in water.

Explore the Software

### California Groundwater Model Archive

Interactive map of California groundwater models, associated publications and resources, and download links.

Go to the Archive

## Browse Topics

Groundwater Supply

Land Subsidence

Seawater Intrusion

Sustainable Groundwater Management Act (SGMA)

Water Quality Model

Watersheds

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November 14, 2023

####                 Water Availability of the Salton Sea Watershed              

California Water Science Center

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November 14, 2023

####   Water Availability of the Salton Sea Watershed

Learn More

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December 16, 2022

####                 Salinas Valley Operational Model: Interlake Tunnel and San Antonio Spillway Modification Project              

California Water Science Center

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December 16, 2022

####   Salinas Valley Operational Model: Interlake Tunnel and San Antonio Spillway Modification Project

Learn More

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September 28, 2021

####                 Los Angeles Coastal Plain Groundwater-flow Model              

California Water Science Center

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September 28, 2021

####   Los Angeles Coastal Plain Groundwater-flow Model

Learn More

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September 28, 2020

####                 Sediment transport, streamflow, and climate change: long-term resilience of the Bay-Delta              

California Water Science Center

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September 28, 2020

####   Sediment transport, streamflow, and climate change: long-term resilience of the Bay-Delta

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April 7, 2020

####                 MODFLOW One-Water Hydrologic Flow Model—Conjunctive Use Simulation Software (MF-OWHM)              

California Water Science Center

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April 7, 2020

####   MODFLOW One-Water Hydrologic Flow Model—Conjunctive Use Simulation Software (MF-OWHM)

Learn More

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June 12, 2019

####                 Basin Characterization Model - Simulating Effects of Iowa Soil Management on Water Availability              

California Water Science Center

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June 12, 2019

####   Basin Characterization Model - Simulating Effects of Iowa Soil Management on Water Availability

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May 16, 2019

####                 San Diego Hydrogeology              

California Water Science Center

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May 16, 2019

####   San Diego Hydrogeology

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April 26, 2019

####                 Regional Groundwater Availability Study of the California Coastal Basins              

California Water Science Center

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April 26, 2019

####   Regional Groundwater Availability Study of the California Coastal Basins

Learn More

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February 27, 2019

####                 Salinas and Carmel River Basins Study              

California Water Science Center

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February 27, 2019

####   Salinas and Carmel River Basins Study

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February 27, 2019

####                 Salinas and Carmel Rivers Basin Study: Paso Robles Model Update              

California Water Science Center

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February 27, 2019

####   Salinas and Carmel Rivers Basin Study: Paso Robles Model Update

Learn More

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February 27, 2019

####                 SGMApy: An open source platform for computing sustainability metrics and visualizing MODFLOW data              

California Water Science Center

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February 27, 2019

####   SGMApy: An open source platform for computing sustainability metrics and visualizing MODFLOW data

Learn More

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February 26, 2019

####                 Pajaro Valley Hydrologic Model Update, Data Collection, and Analysis for Sustainability              

California Water Science Center

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February 26, 2019

####   Pajaro Valley Hydrologic Model Update, Data Collection, and Analysis for Sustainability

Learn More

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