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Latest Erosion Stories

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2007-07-17 14:25:47

The first soil moisture maps with a spatial resolution of one km are available online for the entire southern African subcontinent. As soil moisture plays an important role in the global water cycle, these maps, based on data from ESA's Envisat satellite, will lead to better weather and extreme-event forecasting, such as floods and droughts. "Predicting when and where floods are likely to happen is becoming more and more important," Geoff Pegram of the University of KwaZulu-Natal, South...

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2007-01-19 15:24:55

NASHVILLE, Tenn. - There is a dark side to even the humble raindrop. A single drop is harmless, but when billions of raindrops from a cloudburst fall on bare soil they strike like billions of tiny hammers, dislodging tons of soil per acre which is carried away by surface runoff. This process, called splash erosion, is of critical importance to agriculture. It is the initial stage of water erosion, which causes an estimated $27 billion in on-site economic losses in the United States annually....

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2006-12-01 17:45:00

SYRACUSE, N.Y. -- Mother Nature may be a force, but nothing like humans when it comes to causing erosion, says a Syracuse University scientist. Humans cause erosion at a rate 10 to 15 times faster than any natural process, according to new research by Bruce Wilkinson, a sedimentary geologist. Scientists have long identified humans as the primary agents altering the shape of the Earth's surface. Wilkinson said his study gauged the rate of man-made erosion and compared the speeds and...

2006-06-05 09:40:00

By Hamid Ould Ahmed ALGIERS (Reuters) - The United Nations used World Environment Day on Monday to warn that the growth of deserts was a growing obstacle to ending poverty and a threat to peace. To mark the day under the slogan "Don't desert drylands!," environmentalists were planting trees to slow erosion, cleaning cities, going on marches and holding special lessons in school. Algerian President Abdelaziz Bouteflika, whose largely desert country was officially hosting the campaign, urged...

2006-06-05 07:45:00

By Hamid Ould Ahmed ALGIERS (Reuters) - The United Nations used World Environment Day on Monday to warn that land turning to desert is a growing obstacle to ending poverty and a threat to peace. To mark the day under the slogan "Don't desert drylands!," environmentalists were planting trees to slow erosion, cleaning cities, going on marches and holding special lessons in school. Algerian President Abdelaziz Bouteflika, whose largely-desert country was officially hosting the campaign, urged...

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2006-01-30 06:55:16

BERKELEY -- One of the paradoxes of recent explorations of the Martian surface is that the more we see of the planet, the more it looks like Earth, despite a very big difference: Complex life forms have existed for billions of years on Earth, while Mars never saw life bigger than a microbe, if that. "The rounded hills, meandering stream channels, deltas and alluvial fans are all shockingly familiar," said William E. Dietrich, professor of earth and planetary science at the University of...

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2005-12-17 18:20:00

NASA -- Glaciers, rivers and shifting tectonic plates have shaped mountains over millions of years, but earth scientists have struggled to understand the relative roles of these forces and the rates at which they work. Now, using a new technique, researchers at the University of Michigan, California Institute of Technology and Occidental College have documented how fast glaciers eroded the spectacular mountain topography of the Coast Mountains of British Columbia. Their work is described in...

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2005-10-25 18:57:58

NASA -- Typically we think of rainfall as cleaning the air by removing dust as it falls through the atmosphere and helping plants grow that protect and hold the soil. But a new NASA-funded study looking at some of the world's dustiest areas shows that heavy downpours can eventually lead to more dust being released into the atmosphere. Typically drought reduces vegetation growth, increasing soil vulnerability to wind erosion, while rainfall tends to have the opposite effect. In the new study...

2005-10-12 20:12:55

By Ed Stoddard CHIKWAWA, Malawi (Reuters) - Jennifer Chikapa is carting Malawi's future away on her head. "I'm collecting for firewood, it's the only fuel I have to cook with," she said as she paused beneath a baking sun, a pile of slender tree trunks perched on her head and an infant slung on her back. The wood will last her at least a week as she has little to cook. Aid agencies say around 5 million Malawians -- almost half the population of one of the world's poorest countries --...

2005-09-12 17:41:35

Wind generator vanes can suffer degradation by erosion, particularly at their outer edge, produced by particles (dust, sand, etc.) which are present suspended in the air. Because of this, the ever increasing presence of wind parks in zones of extreme climate make it puts an onus on optimising the protection coating material, with the aim of guaranteeing good yields, even in the most extreme conditions. The main parameters that affect this phenomenon are, on the one hand, gel-coat...


Latest Erosion Reference Libraries

Erosion
2013-04-01 12:48:39

Erosion is the process by which rock and soil are taken from the surface of the Earth by exogenetic processes like wind or the flow of water, and then transported and deposited in another location. While erosion is a natural process, human activities have increased by 10 to 40 times the rate at which erosion is happening globally. Excessive erosion results in problems such as desertification, decreases in agricultural productivity because of land degradation, sedimentation of waterways,...

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