Rivers are terrestrial flowing surface waters that drain well defined watersheds. A river typically has a geographic origin, termed its headwaters. In general, there are smaller rivers or streams that merge into the principal river of a given watershed; such influent streams are called tributaries of the principal river. Most rivers either discharge to a larger watercourse or flow into one of the seas of the world. In the less common circumstance, a river may terminate in an inland lake, with no outlet; this circumstance is called an endorheic basin. Rivers are home to a diversity of flora and fauna.
The Yukon River is the third longest river in North America, flowing northwest from the Coastal Range mountains of northern British Columbia, through the Yukon Territory and...
Kola Peninsula tundraLast Updated on 2013-05-15 at 15:42
The Kola Peninsula tundra is a ecoregion covering much of Kola Peninsula of Russia as well as some northern Scandinavian subcoastal areas along the Barents Sea.
The... More »
Senegal RiverLast Updated on 2013-05-04 at 15:03
The Senegal River watershed in West Africa has tributaries that rise in the nations of Guinea and Mali, with the Senegal course leading generally west to discharge into the... More »
Benue RiverLast Updated on 2013-05-02 at 22:27
The Bénué River (alternatively spelled Bénoué) is the chief tributary of the Niger River, and flows a course of 1402 kilometres through... More »
Nenjiang RiverLast Updated on 2013-05-02 at 21:31
The Nenjiang River (also termed the Nen River, Nonni River, Nen Jiang or Nen Chiang) is a major river in northeast China which flows largely south into the the Songhua River,... More »
Orange RiverLast Updated on 2013-05-02 at 13:22
The Orange River is the longest watercourse in Southern Africa. Lying south of the Zambezi River, The Orange River rises in the Drakensberg Mountains and flows westward to... More »
Vaal RiverLast Updated on 2013-05-02 at 13:21
The Vaal River rises in the Drakensberg Mountains within the nation of South Africa and is the chief tributary of the Orange River. At 1105 kilometres in length, the Vaal is... More »