Dam
hideA dam is a barrier that impounds water or underground streams. 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. Hydropower and pumped-storage hydroelectricity are often used in conjunction with dams to provide clean electricity for millions of consumers.
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News tagged with dam
Japan eyes solar station in space as new energy source
Nov 08, 2009 |
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It may sound like a sci-fi vision, but Japan's space agency is dead serious: by 2030 it wants to collect solar power in space and zap it down to Earth, using laser beams or microwaves.
Toxic legacy seeps from melting Alpine glaciers: study
Oct 14, 2009 |
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Swiss researchers have found that Alpine glaciers melting under the impact of climate change are releasing highly toxic pollutants that had been absorbed by the ice for decades.
Northwest salmon recovery plan may include breaching dams
Sep 16, 2009 |
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In a case closely followed by environmental and business interests, a rewritten plan for restoring endangered and threatened wild salmon runs on the Columbia and Snake rivers in Washington state and Idaho includes studying ...
Feds review mountain-dwelling pika for threatened-species list
Aug 31, 2009 |
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Pikas don't ask much. With brave squeaks, belted out from atop their rock piles, they defend their realm in the talus slopes way up here in the mountains, more than a mile in the sky, far from anyone, anywhere.
PC makers voluntarily supply Web filter in China
Jul 02, 2009 |
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(AP) -- Several PC makers were including controversial Internet-filtering software with computers shipped in China on Thursday despite a government decision to postpone its plan to make such a step mandatory.
China Web controversy highlights public role
Jul 01, 2009 |
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(AP) -- Beijing's retreat on its latest Internet-censorship effort highlights the rise of China's increasingly tech-savvy, vocal public as a factor in the authoritarian government's decisions.
China aims to build 'Three Gorges of wind power'
Jun 25, 2009 |
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China is aiming to build a huge wind farm in the northwest by 2020 that will have energy capacity similar to the gigantic Three Gorges Dam, a senior official said Thursday.
What do toad toes show? Plenty, says ASU biologist
Jun 22, 2009 |
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(PhysOrg.com) -- Brian Sullivan has been clipping toes from toads since the early 1980s. It’s not some type of strange hobby, and he releases the toads back into their habitat along the Agua Fria River north ...
UN study advises caution over dams
May 21, 2009 |
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(AP) -- A dam-building spree in China poses the greatest threat to the future of the already beleaguered Mekong, one of the world's major rivers and a key source of water for the region, a U.N. report said ...
China says planning more dams on troubled Yangtze
Apr 21, 2009 |
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China will build at least 20 more reservoirs or hydroelectric projects in the Yangtze river system by 2020, the government said Tuesday, despite growing concerns over dam construction there.
Climate change means shortfalls in Colorado River water deliveries
Apr 20, 2009 |
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The Colorado River system supplies water to tens of millions of people and millions of acres of farmland, and has never experienced a delivery shortage. But if human-caused climate change continues to make ...
Quagga mussels are clogging Hoover Dam, colonizing lakes and rivers
Mar 02, 2009 |
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It took some of America's best engineers, thousands of laborers and two years of around-the-clock concrete pouring to build the 726-foot-high Hoover Dam back in the 1930s. It took less time than that for the tiny, brainless ...
