Missouri Botanical Garden
Missouri Botanical Garden: Rivers and Streams
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.
Other
River Systems of the World
Find statistics about the many river systems of the world. Includes facts such as length, drainage area, cities, notable tributaries, and more. Also provides links to sites about some of the rivers.