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watershed

(Encyclopedia) watershed, elevation or divide separating the catchment area , or drainage basin, of one river system or group of river systems from another system or group of…

Nanling

(Encyclopedia) Nanling nän´līng´ [key], mountain range of Guangdong and Hunan prov. and Guangxi Zhuang Autonomous Region, S China; rises to c.6,900 ft (2,100 m). The Nanling form the…

Rupert's Land

(Encyclopedia) Rupert's Land, Canadian territory held (1670–1869) by the Hudson's Bay Company , named for Prince Rupert, first governor of the company. Under the charter…

catchment area

(Encyclopedia) catchment area or drainage basin, area drained by a stream or other body of water. The limits of a given catchment area are the heights of land—often called…

Holocene epoch

(Encyclopedia) Holocene epoch hŏl´əsēn [key] or Recent epoch, most recent of all subdivisions of geologic time, ranging from the present back to the time (c.11,000 years ago) of…

Tennessee

(Encyclopedia) Tennessee, river, c.650 mi (1,050 km) long, the principal tributary of the Ohio River. It is formed by the confluence of the Holston and French Broad rivers near…

river

(Encyclopedia) river, stream of water larger than a brook or creek. Land surfaces are never perfectly flat, and as a result the runoff after precipitation tends to flow downward by the…

Columbia

(Encyclopedia) Columbia, river, c.1,210 mi (1,950 km) long, rising in Columbia Lake, SE British Columbia, Canada. It flows first NW in the Rocky Mt. Trench, then hooks sharply about the…

Danube

(Encyclopedia) Danube dăn´yo͞ob [key], Czech Dunaj, Ger. Donau, Hung. Duna, Rom. Dunarea, Serbo-Croatian and Bulg. Dunav, Ukr. Dunay, great…