Related topics: climate change , water , lake
River
hideA river is a natural watercourse, usually freshwater, flowing toward an ocean, a lake, a sea or another river. In a few cases, a river simply flows into the ground or dries up completely before reaching another body of water. Small rivers may also be called by several other names, including stream, creek, brook, rivulet, and rill; there is no general rule that defines what can be called a river. Many names for small rivers are specific to geographic location; one example is Burn in Scotland and North-east England. Sometimes a river is said to be larger than a creek, but this is not always the case, due to vagueness in the language.
A river is part of the hydrological cycle. Water within a river is generally collected from precipitation through surface runoff, groundwater recharge, springs, and the release of stored water in natural ice and snowpacks (i.e., from glaciers).
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News tagged with rivers
Greenland glaciers: What lies beneath
Space & Earth / Earth Sciences
Dec 15, 2009 |
3.6 / 5 (5) |
1
Scientists who study the melting of Greenland's glaciers are discovering that water flowing beneath the ice plays a much more complex role than they previously imagined.
NASA tech zooms in on water and land
Dec 15, 2009 |
not rated yet |
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In a pilot project that could help better manage the planet's strained natural resources, space-age technologies are helping a Washington state community monitor its water availability. NASA satellites and ...
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Feds mull regulating drugs in water
6 hours ago |
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0
(AP) -- Federal regulators under President Barack Obama have sharply shifted course on long-standing policy toward pharmaceutical residues in the nation's drinking water, taking a critical first step toward regulating some ...
Glowing channels: Microanalysis system for rapid mercury detection
Chemistry / Analytical Chemistry
15 hours ago |
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(PhysOrg.com) -- Water contaminated with mercury is very dangerous for both people and the environment, as mercury is one of the most toxic heavy metals. Though laboratory analyses do deliver precise quantitative measurements, ...
Polluting pets: the devastating impact of man's best friend
Dec 21, 2009 |
1.8 / 5 (25) |
24
Man's best friend could be one of the environment's worst enemies, according to a new study which says the carbon pawprint of a pet dog is more than double that of a gas-guzzling sports utility vehicle.
IBM Reveals Five Innovations that Will Change Cities in the Next Five Years (w/ Video)
Dec 17, 2009 |
3.4 / 5 (9) |
1
Today, IBM unveiled a list of innovations that have the potential to change how people live, work and play in cities around the globe over the next five to ten years.
Orion Launch Abort System Attitude Control Motor Lights Up Sky
Space & Earth / Space Exploration
Dec 17, 2009 |
4.7 / 5 (3) |
1
(PhysOrg.com) -- It looked like a light show in Elkton, Md., on Tuesday, Dec. 15, as NASA ground tested a full-scale attitude control motor, or ACM. The motor operated with precision as its elaborate eight-valve ...
Headwater stream nutrient enrichment disrupts food web
Dec 17, 2009 |
4.2 / 5 (6) |
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Human activity is increasing the supply of nutrients, such as nitrogen and phosphorus, to stream systems all over the world. The conventional wisdom -- bolstered by earlier research -- has held that these additional nutrients ...
Lost water of the Napa Valley vineyards
Space & Earth / Earth Sciences
Dec 16, 2009 |
4.3 / 5 (3) |
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Getting the most out of every drop of water is a high priority for grape growers in the southern Napa Valley, where summers are hot and dry and vines have to be irrigated to make it through the growing season. But Stanford ...
Even at sublethal levels, pesticides may slow the recovery of wild salmon populations
Dec 16, 2009 |
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Biologists determined that short-term, seasonal exposure to pesticides in rivers and basins may limit the growth and size of wild salmon populations. In addition to the widespread deterioration of salmon habitats, these findings ...
Sick of swine flu? Toxic algae could be the next big threat
Dec 15, 2009 |
3 / 5 (2) |
1
With a new theory surfacing that toxic algae rather than asteroids killed the dinosaurs, scientists are still trying to unravel the mystery of what caused a massive algae bloom off the Northwest Coast that left thousands ...
A unique geography -- and soot and dust -- conspire against Himalayan glaciers
Space & Earth / Earth Sciences
Dec 15, 2009 |
4 / 5 (2) |
1
"So many disparate elements, both natural and man-made, converge in the Himalayas," said William Lau, a climatologist from NASA's Goddard Space Flight Center in Greenbelt, Md. "There's no other place in the ...
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