Science Programs and Partnerships
Supplying necessary scientific information to local, state, and federal agencies, and non-governmental organizations
Supplying necessary scientific information to local, state, and federal agencies, and non-governmental organizations
Aquatic Ecology
Gaining better understanding of the effects that human activity, hydrologic extremes, and climate change have on aquatic ecosystems
Gaining better understanding of the effects that human activity, hydrologic extremes, and climate change have on aquatic ecosystems
Groundwater
Using science to assess and quantify the availability and quality of California's groundwater resources
Using science to assess and quantify the availability and quality of California's groundwater resources
Water Quality
Providing foundational data and scientific analysis to address water quality issues facing California
Providing foundational data and scientific analysis to address water quality issues facing California
Surface Water
Understanding the science about California surface-water use for irrigation, public consumption, and ecosystems
Understanding the science about California surface-water use for irrigation, public consumption, and ecosystems
California Flood Science
Helping emergency managers and others protect life and property from floods and other water-related hazards
Helping emergency managers and others protect life and property from floods and other water-related hazards
California Drought
Monitoring the effects of drought in California through data collection and research
Monitoring the effects of drought in California through data collection and research
California Water Science Center
The U.S. Geological Survey, California Water Science Center provides reliable, impartial, foundational data and scientific analysis to address water issues facing California today. We conduct hydrologic monitoring and investigative studies in partnership with tribal, federal, state, and local agencies to assist them in managing California's water resources.
Large Storms & Floods in California History
Large Storms & Floods in California History
Storms unleash torrential rain and intense winds, posing significant challenges to infrastructure and triggering widespread flooding. Since it became a state in 1850, California has experienced numerous large storms and floods.
Join the USGS Team
Join the USGS Team
Explore careers at the USGS, experience a day in the life of employees, navigate USAJobs, and see frequent questions on Federal hiring.
California Water & Drought Data
California Water & Drought Data
Basic hydrologic data collection, processing, analysis, dissemination, and archiving are major parts of the California Water Science Center program.
News
Using Mixed Telemetry Methods to Measure Soil Moisture for Improving Runoff Forecasting in the Sierra Nevada
Using Mixed Telemetry Methods to Measure Soil Moisture for Improving Runoff Forecasting in the Sierra Nevada
Publications
A literature review and hypsometric analysis to support decisions on trout management flows on the Colorado River downstream from Glen Canyon Dam
Executive SummaryFish stranding has been studied in select rivers worldwide, often with the purpose of determining how to mitigate adverse effects of dam operations on highly valued salmon and trout populations. However, where a reduction in trout population size is desired by resource managers, as is the case downstream of the Glen Canyon Dam on the Colorado River, flow manipulations termed trout
Assessing potential effects of oil and gas development activities on groundwater quality near and overlying the Elk Hills and North Coles Levee Oil Fields, San Joaquin Valley, California
Groundwater resources are utilized near areas of intensive oil and gas development in California’s San Joaquin Valley. In this study, we examined chemical and isotopic data to assess if thermogenic gas or saline water from oil producing formations have mixed with groundwater near the Elk Hills and North Coles Levee Oil Fields in the southwestern San Joaquin Valley. Major ion concentrations and sta
Pesticide concentrations of surface water and suspended sediment in Yolo By-Pass and Cache Slough Complex, California, 2019–2021
Managed flow pulses in the north Sacramento-San Joaquin Delta are an adaptive management tool used in efforts to enhance food availability in delta smelt (Hypomesus transpacificus) habitat as part of the North Delta Food Subsidies Action. The California Department of Water Resources (DWR) monitors non-managed seasonal and local flow pulses and managed flow pulses from agricultural drainage or main
Science
Post-Fire Hazards Impacts to Resources and Ecosystems (PHIRE): Support for Response, Recovery, and Mitigation
The Post-Fire Hazards Impacts to Resources and Ecosystems (PHIRE) project provides science to characterize climate-amplified, uncharacteristic patterns of wildfire disturbance and post-fire ecosystem recovery and enhance prediction of environmental impacts and post-fire hazards.
By
Ecosystems Mission Area, Natural Hazards Mission Area, Land Management Research Program, Alaska Science Center, California Water Science Center, Earth Resources Observation and Science (EROS) Center , Fort Collins Science Center, Washington Water Science Center, Western Ecological Research Center (WERC), Wildland Fire Science
Bay-Delta Catchability Study
Addressing Catchability Bias in Fish Surveys San Francisco Bay and the Sacramento-San Joaquin Delta collectively make up the "Bay-Delta." In the scientific study of fish, "catchability" refers to the probability that a fish will be captured by a particular fishing gear or method. Catchability is a measure of how effectively a fishing gear or method can capture fish. "Catch data" refer to...
Santa Ana River Native Fish Study
Native Fish Population and Habitat Study, Santa Ana River, California The Santa Ana River, the largest river in southern California, flows through diverse landscapes, from the high desert to urban and suburban areas in Orange, Riverside, and San Bernardino Counties, stretching approximately 96 miles (154 kilometers) from its headwaters in the San Bernardino Mountains to its mouth at the Pacific...