Columbia Encyclopedia

Search results

500 results found

eutrophication

(Encyclopedia)eutrophication yo͞otrōˌfĭkāˈshən [key], aging of a lake by biological enrichment of its water. In a young lake the water is cold and clear, supporting little life. With time, streams draining i...

Babbitt, Milton

(Encyclopedia)Babbitt, Milton, 1916–2011, American composer, b. Philadelphia. Babbitt turned to music after studying mathematics. He studied composition with Roger Sessions at Princeton, and taught there from 193...

Boston Public Library

(Encyclopedia)Boston Public Library, founded in 1848, chiefly through the gift of Joshua Bates, and opened to the public in 1854. It is the oldest free public city library supported by taxation in the world and the...

Tônlé Sap

(Encyclopedia)Tônlé Sap tŏnˈlā säp [key] [great lake], lake, central Cambodia; largest lake of SE Asia. It occupies the depression of the Cambodian plain and is fed by many streams; the Tônlé Sap River, c.7...

Sevan

(Encyclopedia)Sevan syĭvänˈ [key], lake, c.540 sq mi (1,400 sq km), NE Armenia, at an altitude of 6,280 ft (1,914 m); it is 324 ft (99 m) deep. The largest lake of the Caucasus, it is fed by some 30 streams, but...

Titicaca

(Encyclopedia)Titicaca tētēkäˈkä [key], lake, c.3,200 sq mi (8,290 sq km), 110 mi (177 km) long, and c.900 ft (270 m) deep at at its deepest point, in the Andes Mts., on the Bolivia-Peru border; second largest...

Bonneville Salt Flats

(Encyclopedia)Bonneville Salt Flats bŏnˈəvĭl, bŏˈnēvĭl, bŏnˈvĭl [key], desert area in Tooele co., NW Utah, c.14 mi (22.5 km) long and 7 mi (11.2 km) wide. The smooth salt surface of the Flats is ideal fo...

Welland Ship Canal

(Encyclopedia)Welland Ship Canal, 27.6 mi (44.4 km) long, SE Ont., Canada, connecting Lake Ontario with Lake Erie and bypassing Niagara Falls. Built between 1914 and 1932 by Canada to replace a canal opened in 1829...

Georgian Bay

(Encyclopedia)Georgian Bay, large northeastern extension of Lake Huron, S Ont., Canada, separated from Lake Huron by Manitoulin Island and by the Bruce Peninsula; Lucas Channel is its chief connection with Lake Hur...

Vänern

(Encyclopedia)Vänern vĕˈnərn [key], lake, c.2,145 sq mi (5,560 sq km), SW Sweden, fed by the Klarälven and drained by the Götaälv SW into the Kattegat. It is the largest lake in Sweden and the third largest ...