by Ruth Gustafson – January 11, 2021

Welcome to the UC Davis Library subject guide for hydrology. This guide provides links to key information resources in hydrology, hydrogeology, earth system processes, and water policy and management.


Ruth Gustafson

Student Services
Student Services and Researcher Services Librarian



In this Guide:

Encyclopedia of Estuaries
Encyclopedia of Lakes and Reservoirs
Encyclopedia of Snow, Ice and Glaciers
Encyclopedia of Water Science
Encyclopedic Dictionary of Hydrology

Comprehensive reference guide with complete definitions of terms in hydrogeology and other fields closely related to water practice.

Water Glossary

Glossary of water-related terms from the California Department of Water Resources.

Water Resources Collections and Archvies

The Water Resources Collections & Archives (WRCA) acquires, preserves, and provides access to materials that document water-related issues throughout the United States and beyond, with a particular emphasis on issues affecting the state of California.  The physical archives are located at UC Riverside.

Water Science Glossary of Terms

Water-related terms compiled from a number of sources by the US Geological Survey (USGS).

These are federal and international sources of information.  See California Water Resources for state and regional information.

Global Runoff Database

Global database of river discharge data from the Global Runoff Data Center which is an International data center operating under the auspices of the World Meteorological Organization (WMO).

Ground Water Atlas of the United States

Describes the ground-water resources of regional areas that collectively cover the 50 States, Puerto Rico, and the U.S. Virgin Islands.

National Water Model

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

Surf Your Watershed

Data for watersheds from the EPA searchable by geographic location.

USGS Streamer

Visualize water flow through major streams in the United States by tracing them upstream to their source or downstream to where they empty.

Water Data

Data tables from The World’s Water series published by the Pacific Institute.

Water Resources of the United States

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.

Water Topics

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


The Water Education Foundation’s online water encyclopedia contains vetted information about the places, people and topics key to water in the West.

CADWR Land Use Viewer

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

California Data Exchange Center (CDEC)

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

California Department of Water Resources (CADWR)

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

California WaterBlog

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

California Water Plan

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

California Water Science Center

California water data from the US Geological Survey.

California Water Virtual Tour

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.

Disadvantaged Communities Mapping Tool

Tool from the Department of Water Resources that shows disadvantaged communities through out the state.

Groundwater Information and Educational Resources

From the UC Division of Agriculture and Natural Resources.

Maven's Notebook

California water news

PPIC Water Policy Center

The Public Policy Institute of California’s Water Policy Center which focuses on three critical challenges to California water: water supplies, healthy and resilient ecosystems, and droughts and floods.

Water and Drought News (Sacramento Bee)

California water & drought related news from the Sacramento Bee newspaper.

Water Data Library

Data from monitoring stations throughout the state of California.