About 82% of all California water withdrawals were from fresh-water sources, compared with 72% in 2005. In both 2005 and 2010, about 74% of all fresh water withdrawals were for irrigation. …

These static archival products supplemented direct access to current and historical water data provided by the National Water Information System web interface (NWISWeb), the …

An overview of USGS water use, groundwater availability, land subsidence, and drought research in California's Central Valley.

Surface Water, Drought and Climate. The discharge and quality of water from California rivers and reservoirs have broad effects on factors such as water availability, and ecosystem system …

In the Central Valley of California, the demand for water resources for people and agriculture competes with environmental needs, such as maintaining minimum streamflows, preventing …

Locate, view, download scientific and technical articles, reports, fact sheets, and other publications on a wide range of water resource topics from the USGS California Water …

Combined with the Farm Process, MODFLOW simulates natural and human-induced water movement and consumption over the landscape and accounts for supply-constrained and …

U.S. Geological Survey hydrologic models can provide insights that water-resource managers in California need to plan effectively for future water demands and answer scientific and …

Overview of the San Joaquin Basin, located in California's Central Valley, including geography, climate, land use, and water use.

The location of multiple-well monitoring sites, domestic and supply wells, springs, and surface water sites with available water-quality data, Cuyama Valley, Santa Barbara County, California.