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Remains of the Band-e Kaisar dam, built by the Romans in the 3rd century AD. In Iran, bridge dams such as the Band-e Kaisar were used to provide hydropower through water wheels, which often powered water-raising mechanisms. One of the first was the Roman-built dam bridge in Dezful, [24] which could raise water 50 cubits (c. 23 m
Dams and the creation of reservoirs also require relocation of potentially large human populations if they are constructed close to residential areas. The record for the largest population relocated belongs to the Three Gorges dam built in China. Its reservoir submerged a large area of land, forcing over a million people to relocate.
The Contra Dam is a concrete slender arch dam with a height of 220 m (720 ft) and crest length of 380 m (1,250 ft). The dam is 25 m (82 ft) wide at its base and 7 m (23 ft) wide at its crest. The dam structure contains 660,000 m 3 (23,000,000 cu ft) of concrete and the structure itself has a surface area of 44,500 m 2 (479,000 sq ft). The dam ...
But most of these dams were built between the 1930s and 1960s, and some are now beyond their useful lives. Today, we understand dams compromise entire ecosystems. We have better ways to reap the ...
If you know one thing about beavers, it's probably that they build dams. (Here are a few more things: These rodents are second only to humans in their ability to manipulate the environment, and ...
This type of dam is a good choice for sites with wide valleys. They can be built on hard rock or softer soils. For a rock-fill dam, rock-fill is blasted using explosives to break the rock. Additionally, the rock pieces may need to be crushed into smaller grades to get the right range of size for use in an embankment dam. [3]
Detention dams have two basic designs. [5] The detention dam can be made from concrete or masonry, usually with a metal reinforcing substructure. The concrete or masonry style dam commonly has a cross sectional shape similar to a right triangle with the sloping face pointing downstream and the perpendicular face pointing upstream.
This is an accepted version of this page This is the latest accepted revision, reviewed on 2 January 2025. Dam in Clark County, Nevada, and Mohave County, Arizona, US For other uses, see Hoover Dam (disambiguation). "Boulder Dam" redirects here. For other uses, see Boulder Dam (disambiguation). Dam in Arizona, U.S. Hoover Dam Hoover Dam by Ansel Adams, 1941 Official name Hoover Dam Location ...
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