Dam | Definition, History, Types, Environmental Impacts, Examples ...
2024年10月11日 · 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. They are used to increase the amount of water available for generating hydroelectric power, to reduce peak discharge of floodwater ...
Dam - Wikipedia
Dam. The Edersee Dam in Hesse, Germany. A dam is a barrier that stops or restricts the flow of surface water or underground streams. Reservoirs created by dams not only suppress floods but also provide water for activities such as irrigation, human consumption, industrial use, aquaculture, and navigability.
Dams - Education | National Geographic Society
2024年6月21日 · 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.
Dam - The modern dam | Britannica - Encyclopedia Britannica
2024年10月11日 · Many large dams have been built in the seismically active regions of the world, including Japan, the western United States, New Zealand, the Himalayas, and the Middle East. In 1968 the Tokachi earthquake damaged 93 dams in Honshu, the main Japanese island; all were embankment dams of relatively small height.
How Are Dams Built? - Digital Builder - Autodesk
2024年6月19日 · A dam is a structure commonly built across a river or stream to create a large reservoir behind it. We use dams for various human consumption purposes such as irrigation, hydroelectric power, reducing peak floodwater, and improving navigation.
World’s largest dams | Description & Facts | Britannica
Dams are among the most massive human structures ever built, with many of the largest examples constructed using several million tonnes of dirt, rock, concrete, and other materials to span rivers or estuaries or to sequester lake water. Dams serve a variety of purposes, including storing water for.
Global Dam Tracker: A database of more than 35,000 dams with
2023年2月23日 · We present one of the most comprehensive geo-referenced global dam databases to date. The Global Dam Tracker (GDAT) contains 35,000 dams with cross-validated geo-coordinates,...
Dams, Engineering, and Technology - National Geographic
Over the last decade, some 430 dams have been removed from U.S. rivers, opening up habitat for fisheries, restoring healthier flows, improving water quality, and returning life to rivers.
How Are Dams Built? (Animated) - BigRentz
2023年11月15日 · To build a dam, workers divert the water to then build on dry ground. Various methods like blasting diversion channels or creating cofferdams can divert water. Dams make much of modern-day society possible — they create reservoirs that provide reliable water supply to our cities, farmlands, industrial projects and more.
Hydropower dams: What's behind the global boom? - BBC
The collapse of a newly built dam in Laos has shone a spotlight on a worldwide construction boom. Many thousands of hydropower dams are either planned or under construction - across South...