The number of large and small dams being removed from U.S. rivers is few, but increasing, as both river restoration gains popularity and aging dams lose their license from the Federal Energy Regulatory Commission. But with these removals come ecological and geological unknowns.
Geotimes follows the story of Marmot Dam in northwestern Oregon to learn more about what happens when a human-made structure is removed from a river after 94 years. Water flow, sedimentation fluctuations and ecological changes could occur but little is known about the natural processes involved when such a large structure is removed after a long period of time. By using the Marmot Dam as a case study, future dams can be removed more easily and efficiently.
Read learn more about changing landscapes, including what America’s developed coastlines can expect as the climate changes and how salinity is a growing problem in many of the world’s agricultural areas, plus read about dangerous contaminants in China’s water and follow the Appalachian Trail into Canada, in the March issue of Geotimes magazine, available February 29 on newsstands and on the Web at http://www.geotimes.org.
Keep up to date with the latest happenings in earth, energy and environment news by checking out Geotimes online at http://www.geotimes.org. Published by the American Geological Institute, Geotimes is your source for news and perspectives on research, technology and policy that affects you everyday. Sign up for E-alerts, our short, weekly e-mails that alert subscribers to new content posted on the Geotimes Web site, and subscribe to the magazine at http://www.geotimes.org.
Megan Sever | EurekAlert!
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At the LASYS 2018, from June 5th to 7th, the Laser Zentrum Hannover e.V. (LZH) will be showcasing processes for the laser material processing of tomorrow in hall 4 at stand 4E75. With blown bomb shells the LZH will present first results of a research project on civil security.
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There are videos on the internet that can make one marvel at technology. For example, a smartphone is casually bent around the arm or a thin-film display is rolled in all directions and with almost every diameter. From the user's point of view, this looks fantastic. From a professional point of view, however, the question arises: Is that already possible?
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The historic first detection of gravitational waves from colliding black holes far outside our galaxy opened a new window to understanding the universe. A...
A team led by Austrian experimental physicist Rainer Blatt has succeeded in characterizing the quantum entanglement of two spatially separated atoms by observing their light emission. This fundamental demonstration could lead to the development of highly sensitive optical gradiometers for the precise measurement of the gravitational field or the earth's magnetic field.
The age of quantum technology has long been heralded. Decades of research into the quantum world have led to the development of methods that make it possible...
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