Search results
Dams generally serve the primary purpose of retaining water, while other structures such as floodgates or levees (also known as dikes) are used to manage or prevent water flow into specific land regions.
Jul 3, 2024 · dam, structure built across a stream, a river, or an estuary to retain water. Dams are built to provide water for human consumption, for irrigating arid and semiarid lands, or for use in industrial processes.
Jun 21, 2024 · A dam is a structure built across a river or stream to hold back water. People have used different materials to build dams over the centuries. Ancient dam builders used natural materials such as rocks or clay. Modern-day dam builders often use concrete. Manmade dams create artificial lakes called reservoirs.
A dam is a large wall or barrier that blocks or stops the flow of water, forming a reservoir or a lake. Most dams have a section called a spillway or weir over which, or through which, water flows, either sometimes or always. Dams generally serve the primary purpose of retaining water.
A dam is a barrier that blocks flowing water or sends it in a new direction. People and animals build dams to control rivers and to create ponds or lakes. A beaver ’s dam works in much the same way as the giant dams that people build.
dam, Barrier built across a stream, river, or estuary to conserve water for such uses as human consumption, irrigation, flood control, and hydroelectric power generation. The earliest recorded dam is believed to be a masonry structure 15 m (49 ft) high built across the Nile River in Egypt c. 2900 bce.
Karun-3 dam in Iran. A dam is a barrier across flowing water that obstructs, directs, or slows the flow, often creating a reservoir, lake, or impoundment. In Australian and South African English, the word dam may refer to the reservoir as well as the barrier.
Jan 17, 2020 · A dam is any barrier that holds back water; dams are primarily used to save, manage, and/or prevent the flow of excess water into specific regions. In addition, some dams are used to generate hydropower.
Why People Build Dams. Dams are built to provide irrigation, flood control, water supply, improvement of navigation, and electric power. Most modern dams are multipurpose. Irrigation. The primary function of many dams is to provide water for farming. Some dams divert rivers into canals or pipelines to irrigate
Jul 3, 2024 · Dam - The modern dam: Most modern dams are of two basic types: masonry (concrete) gravity designs and embankment (earthfill or rockfill) designs. Masonry dams are typically used to block streams running through relatively narrow gorges, as in mountainous terrain; although the structures may be very high, the total amount of material required ...
