water power

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water power,

mechanical energy derived from falling or flowing water, e.g., rivers, streams, and the overflow of dams. The wooden water wheelwater wheel,
device for utilizing the power of flowing or falling water. The Norse wheel is the oldest type known. Despite its name it probably originated in the Middle East, where the swift stream required by this type of wheel is common.
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, long utilized for driving machinery in flour mills and factories, was largely supplanted by the steam engine in the early 19th cent. In modern practice, water flowing from a higher level to a lower level (as from a dam or waterfall) is used to activate a turbineturbine,
rotary engine that uses a continuous stream of fluid (gas or liquid) to turn a shaft that can drive machinery.

A water, or hydraulic, turbine is used to drive electric generators in hydroelectric power stations.
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 that drives an electric generator, a process called hydroelectric power generation. The amount of power furnished is proportional to the rate of flow of the water and the vertical distance through which it falls. In a pumped-storage plant, water is pumped upward to a high-level reservoir during periods of low electricity demand by using the excess electricity available. During periods of high demand the facility produces electricity by using the water that flows down from the reservoir. The availability of water power along a fall line, which is a boundary between an upland region and a coastal plain, influenced the location of many cities in the E United States. Similarly, Canada, Norway, Sweden, and Switzerland, which have mountainous regions subject to heavy rainfall near industrialized areas, have highly developed hydroelectric programs. Asia, South America, and Africa have the greatest potential for further water power development, the nations of Europe and North America having developed their resources to the greatest extent. In the late 1990s the countries that produced the most hydroelectric power—about 51 percent of the world total—were the United States, Canada, Brazil, China, and Russia. For information on some important hydroelectric power projects, see Churchill FallsChurchill Falls,
spectacular waterfalls of the upper Churchill River, 245 ft (75 m) high, SW Labrador, N.L., Canada; known as Grand Falls until renamed (1965) in honor of Sir Winston Churchill.
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; Niagara FallsNiagara Falls,
in the Niagara River, W N.Y. and S Ont., Canada; one of the most famous spectacles in North America. The falls are on the international line between the cities of Niagara Falls, N.Y., and Niagara Falls, Ont.
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; Columbia basin projectColumbia basin project,
central Wash., a multipurpose development of the U.S. Bureau of Reclamation providing irrigation, hydroelectric power, and flood control. Its key unit, the Grand Coulee Dam, provides the project with power and pumps the waters of the Columbia River into
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; Colorado River storage projectColorado River storage project,
a multipurpose plan, undertaken by the U.S. Bureau of Reclamation in 1956, to control the flow of the upper Colorado and its tributaries and to aid in the development of the rugged, remote upper Colorado River basin; includes parts of Wyo.
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; Saint Lawrence SeawaySaint Lawrence Seaway,
international waterway, 2,342 mi (3,769 km) long, consisting of a system of canals, dams, and locks in the St. Lawrence River and connecting channels between the Great Lakes; opened 1959.
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; Tennessee Valley AuthorityTennessee Valley Authority
(TVA), independent U.S. government corporate agency, created in 1933 by act of Congress; it is responsible for the integrated development of the Tennessee River basin.
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; DniprohesDniprohes
[Ukr. abbr.,=Dnieper hydroelectric station], Rus. Dneproges, a hydroelectric station, central Ukraine, on the Dnieper River near Zaporizhzhya. The hydroelectric station supplies power for the industrial centers of Dnipro (Dnipropetrovsk), Kryvyy Rih, and
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water power

1. the power latent in a dynamic or static head of water as used to drive machinery, esp for generating electricity
2. a source of such power, such as a drop in the level of a river, etc.
3. the right to the use of water for such a purpose, as possessed by a water mill
References in periodicals archive ?
A water-powered backup pump uses water pressure to siphon water out of your sump.
The two most common drilling technologies that meet these demands are percussive drilling with a water-powered DTH hammer, and rotary drilling.
Warwick Castle general manager Tim Harrison-Jones said: "The specially-designed water-powered mobile phone chargers continue our tradition of innovation, as the Earl of Warwick installed one of Britain's first hydro-powered electricity generators here in 1894.
Creating the now-patented micro turbine technology, that allows the radio to operate solely through the flow of water, was the key to our new innovation; and thus the world's first water-powered shower radio was created," he added.
Very long ago, inhabitants used the water-powered mills on a seasonal basis to grind their wheat into flour.
Treehouses by Paula Henderson and Adam Mornement, London: Frances Lincoln Publishers, 2005, [pounds sterling]25, documents the history of the treehouse and increasingly inventive modern structures worldwide, such as those in Kerala, India, where you are hoisted to bed via water-powered lifts, or in Sweden where you pull yourself up by precarious rope.
In high schools they teach the history of the Industrial Revolution--the invention of the steam engine, the Spinning Jenny, water-powered looms, and so forth.
based nonprofit organization Earth 2012 recently announced the launch of a project to develop a water-powered car featuring zero greenhouse gas emissions.
SIR - The subject of wind turbines is still being hotly debated on radio and television and in the press, but no one is paying any attention to water-powered turbines.
A WATER-powered mobile phone could soon become a reality after scientists have discovered a new way to generate electricity.
5 proportional injector pump, which is a water-powered injector pump capable of accurately diluting chemicals.
For instance, Bordesley Abbey Visitor Centre is home to the first water-powered industrial site found in this country.