Dam

:This article discusses structures for water impoundment. For other meanings, see dam (disambiguation).

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A dam is a barrier across flowing water that obstructs, directs or retards the flow, often creating a reservoir, lake or impoundment. Most dams have a section called a spillway, over which or through which it is intended that water will flow either intermittently or continuously.

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Dams may be classified according to structure, intended purpose or height.

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Based on structure and material used, dams are classified as timber dams, embankment dams or masonry dams, with several subtypes.

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Intended purposes include providing water for irrigation or town or city water supply, improving navigation, generating hydroelectric power, creating recreation areas or habitat for fish and wildlife, flood control and containing effluent from industrial sites such as mines or factories. Few dams serve all of these purposes but some multi-purpose dams serve more than one.

Reservoir: Generally, a reservoir is something that can hold matter or energy....

Lake: A lake is a body of water surrounded by land. The majority of lakes are fresh water, and most lie in the northern hemisphere at higher latitudes. Large lakes are sometimes referred to as "inland seas" and small seas are sometimes referred to as lakes....

Irrigation: Irrigation (in agriculture) is the replacement or supplementation of rainfall with water from another source in order to grow crops. In contrast, agriculture that relies only on direct rainfall is sometimes referred to as dryland farming....

Dam related Images and Photos (experimental)

Hoover Dam Aerial	Dam Busters Setting Off	Lanaster Dam Buster Bomber Aviation	Hoover Dam Clark County Nevada USA
The Dam Across the Nile the Building of the Aswan Dam	Beavers Building Dam	The Town Hall on the Dam Amsterdam	Market Scene Before the Dam Palace Amsterdam
View of Boulder Dam 726 Ft. High with Lake Mead 115 Miles Long Stretching Out in the Background	A Transformer at the Hoover Dam Nevada	The Old Amsterdam Fish Market on the Dam	Website of Port Royal Des Champs: the Old Pond Dam