This thorough resource examines how untreated runoff impacts wetlands, efforts by the EPA to educate landowners on how to protect wetlands, the use of wetlands to treat runoff, and current EPA programs that address runoff.

Learn about the different stages of the Earth's water cycle, and about processes involving water, including runoff, infiltration, and the differences between hard and soft water.

This website focuses on water quality issues in relation to urbanization. There are helpful links to brief articles on topics like storm runoff, wastewater, and the underground water table. Click "Water Science School HOME" to access the...

When it rains, some of the rainwater soaks into the ground, and part of it flows over the ground and directly into creeks, streams, or rivers. This water that runs off into the river is called runoff, or sometimes stormwater runoff....

Information about the first federal legislation to address pollution caused by stormwater runoff from the landscape.

Water is the source of life on earth. It exists in many forms and is constantly changing. The circulation and conservation of earth's water is called the hydrologic (or water) cycle. Find out how water evaporates, condensates,...

Overview and maps of the Gulkana Glacier along the south flank of the eastern Alaska Range.

A collection of resources--pictures, maps, data, glossary--about water and the water cycle.

A quick summary of the water cycle that includes a diagram of the cycle, with links to in-depth explanations of each component of the cycle. Click "water-cycle home" to access water-cycle resources in a variety of languages.

Animation and text explain the water--or hydrologic--cycle, which is the process that water undergoes in nature.

The Evergreen Project profiles the natural history of rivers and streams. Topics include watersheds, how a stream becomes a river, erosion, water pollution, and the like.

The USGS explains the definition of a river and how a river is supplied with water. Included is a cross section of a river. Click Home to access the site in Spanish.

The USGS reviews the differences between lakes and reservoirs. They discuss the history of freshwater and salt water lakes. Click Home to access the site in Spanish.

This is a very brief overview of the water cycle, but it does have a nice graphical representation.

Terraces are constructed in agriculture to prevent the runoff of water. This site provides further details about terraces along with how they have been used in history.

Lake Mattamuskeet-so named by Algonquian Indians-is North Carolina's largest natural lake. The ancient body of water has not escaped man's intervention. Originally, Mattamuskeet was a shallow, self-contained lake without creeks or rivers...

Did you know that the #1 pollutant in North Carolina is dirt? When soil is washed into streams and river, it smothers small animals and fish by clogging their gills. Look for bare patches of ground around your home and around your school...

This simple overview provides definitions of key terms in the water cycle and a diagram showing the path water takes in this cycle.

A list of ways people can make good choices in everyday activities so as not to contribute to stormwater pollution.

The National Weather Service offers information on the processes that make up the water (hydrologic) cycle, including evaporation and transpiration, precipitation, run-off, infiltration, and percolation. Has a good illustration and...