Hydrology

From the EPA’s Office of Water. Includes informative articles, educational resources, grant information, and regulatory reports.

Water resources is one of seven science mission areas of the U.S. Geological Survey (USGS). The USGS works with partners to monitor, assess, conduct targeted research, and deliver information on a wide range of water resources and conditions including streamflow, groundwater, water quality, and wateruse and availability.

The National Water Model (NWM) is a hydrologic model that simulates observed and forecast streamflow for the continental United States.

These pages provide access to water-resources data collected at approximately 1.9 million sites in all 50 States, the District of Columbia, Puerto Rico, the Virgin Islands, Guam, American Samoa and the Commonwealth of the Northern Mariana Islands. Online access to this data is organized around the categories listed to the left. The USGS investigates the occurrence, quantity, quality, distribution, and movement of surface and underground waters and disseminates the data to the public, State and local governments, public and private utilities, and other Federal agencies involved with managing our water resources.”

The CDEC operates an extensive hydrologic data collection network including snow reporting gages and and precipitation and river stage sensors for flood forecasting.

DWR manages California’s water resources, systems, and infrastructure, including the State Water Project (SWP).

View DWR reports and publications.

Provides access to statewide and county land use survey data sets for the past 30 years.

Informative blog on California water topics from the UC Davis Center for Watershed Sciences.

The California Water Plan is the State government’s strategic plan for managing and developing water resources statewide.

California water data from the US Geological Survey.

This tour is a compilation of videos describing the physical, legal and water management issues in the California water landscape. From the UC Davis Cooperative Extension Water Management website.

From the UC Division of Agriculture and Natural Resources.

AQUASTAT is “FAO’s global information system on water resources and agricultural water management. It collects, analyses and provides free access to over 180 variables and indicators by country from 1960. AQUASTAT draws on national capacities and expertise with an emphasis on Africa, the Near East, countries of the former Soviet Union, Asia, and Latin America and the Caribbean. AQUASTAT plays a key role in the monitoring of the Sustainable Development Goal 6 that sets out to ‘ensure availability and sustainable management of water and sanitation for all’, and in particular indicators of target 6.4 on water stress and water use efficiency.”