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Pechora

(Encyclopedia)Pechora pyĭchôˈrə [key], river, c.1,120 mi (1,800 km) long, rising in the N Urals, N European Russia. It flows generally north through the forest and tundra regions of the Komi Republic and the Ne...

swamp

(Encyclopedia)swamp, shallow body of water in a low-lying, poorly drained depression, usually containing abundant plant growth dominated by trees, such as cypress, and high shrubs. Swamps develop in moist climates,...

Miocene epoch

(Encyclopedia)Miocene epoch mīˈəsēn [key], fourth epoch of the Tertiary period in the Cenozoic era of geologic time (see Geologic Timescale, tablegeologic timescale, table), lasting from around 24.6 to 5.1 mill...

drainage, in agriculture

(Encyclopedia)drainage, in agriculture, the removal of excess water from the soil, either by a system of surface ditches, or by underground conduits if required by soil conditions and land contour. Diesel or centri...

Dongting

(Encyclopedia)Dongting or Tungting both: do͝ongˈtĭngˈ [key], shallow lake, Hunan prov., SE China; one of China's largest lakes. It is fed by the Yuan, Zi, Xiang, and many smaller rivers; a canal connects it wit...

Croton Aqueduct

(Encyclopedia)Croton Aqueduct krōˈtən [key], 38 mi (61 km) long, SE N.Y., carrying water from the Croton River basin to New York City; built 1837–42. It was one of the earliest modern aqueducts in the United S...

Daegu

(Encyclopedia)Daegu or Taegu dīˈgo͞oˈ [key], Jap. Taiku, city, S South Korea, on the Sincheon and Geum ...

Huai

(Encyclopedia)Huai or Hwai both: hwī [key], river, c.680 mi (1,090 km) long, rising in the Tongbai Mts., Henan prov., E China, and flowing E across Anhui prov., through Hongze Lake, to the East China Sea. The Huai...

Gunsan

(Encyclopedia)Gunsan or Kunsan go͝onˈsänˈ [key], Jap. Gunzan, city, North Jeolla (Cholla) prov., SW Sou...

Gatún Lake

(Encyclopedia)Gatún Lake gäto͞onˈ [key], artificial lake, 163 sq mi (422 sq km), Colón Prov., Panama, formed by the impounding of the Chagres River. Gatún Dam (completed 1912), 11⁄2 mi (2.4 km) long and 115...