This database provides access to discharge data from the original UNESCO river archive in a digital format for use by researchers and planners in the water sciences community. While this is a very good global resource, it does not present information on rivers in the United States. Full description.

As concerns over water resources and the environment grow, the importance of considering ground water and surface water as a single resource has become increasingly evident. The natural processes of groundwater-surface water interaction and human influences on this interaction are presented here, touching on natural ground-surface water interactions as part of the hydrologic cycle, chemical interactions, ... Full description.

This clearinghouse-style site from the Environmental Literacy Councilprovides links to information, articles and educational materials on several environmental subjects, including water. The water-specific segment features information on topics ranging from hydroelectric power to eutrophication to rogue waves. The articles featured cover scientific and social aspects of water. The Teaching Water segment ... Full description.

Students participate in two interactive exercises designed to help the user learn about river processes like discharge, flooding, and flood frequency. Each activity requires a person to make careful observations and measurements, do simple calculations, and answer questions about his or her work. A Certificate of Completion is available for printing at the end of each activity. Full description.

InterWET was created to help officials and concerned citizens about groundwater resources. Using a case study of the Spring Creek Watershed (central PA), the site gives a multi-layered view on the issues surrounding watershed use and availability. The site uses a series of webpages from three perspectives: a researcher, a conservationist, and a local official. Each page offers interactive lessons ... Full description.

Materials here focus on worldwide water issues and policy decisions, and discussions of ongoing projects involving conservation, drought mitigation, and solutions for small landholders. A set of tools and databases is available for evaluating irrigation results, developing scenarios for water and food supply policy decisions, and evaluating the health of fresh-water ecosystems. This site is sponsored ... Full description.

This interactive map depicts real-time steam flow compared to historical stream flow for selected gauging stations in the United States and Puerto Rico. Users may select a state and choose a list of all stations in the state, a state map, or a list of the nearest stations. The map tracks short-term changes (over several hours) in rivers and streams. Its appearance may change very little from one hour ... Full description.

This expansive site provides information about water and its relation to conflict throughout the world. There are numerous articles about and links to information on water laws, disputes, and issues.The site also lists various water-related meetings and conferences being held around the world. Full description.

This USGS Fact sheet provides an overview of water quality considerations. Each brief section contains definitions and descriptions. The topics include how to measure water quality, why there are standards and guidelines, the effect of natural processes, the effect of human activities, pathogens found in water, and links to sites in USGS with additional information. Full description.

As part of its Water Science for Schools site, the US Geological Survey defines industrial water use and includes several tables and maps showing where and how industry uses water. Students and teachers can look at their state and see 1990 data for how much ground water and how much surface water is used in industry as well as how much of that water is fresh or saline. Full description.