Water and Hydrology

About the minority of springs that yield warm water.

See if your thirst for learning will pay off in this million-dollar quiz.

The National Integrated Drought Information System runs this clearinghouse for drought-related information.

The Canadian agency Environment Canada has a thorough, easy-to-use introduction to the subject.

The U.S. Environmental Protection Agency hosts this finder page. From it you can locate scientific data related to your watershed.

An enormous site by UNESCO covering 11 languages. The English section has some 2000 entries.

The U.S. Geological Survey has put all 13 volumes online, covering the major aquifers of all 50 states, Puerto Rico, and the Virgin Islands.

Founded by a Nebraska mother in 1985, this level-headed organization educates about and rallies support for the hidden treasure of groundwater.

A charming, informative article in Yomiuri Shimbun about the Kansai region, the cultural heart of Japan, and its excellent waters.

The center of the well-drilling professions, the NGWA shares information, supports research and education, and conducts political outreach related to groundwater resources.

SAHRA (Sustainability of Semi-Arid Hydrology and Riparian Areas) is a wide-ranging program by the University of Arizona, studying ways to live on the water we have. Includes teacher materials and other outreach.

Gateway to the U.S. Geological Survey's extensive resources on the nation's groundwater.

A handy place for a wide range of water-related stories.

The U.S. Geological Survey, America's premier water agency, describes some of its significant efforts both scientific and practical.

The U.S. Geological Survey, the government's lead agency on water matters, posts this set of about 150 definitions.