Erosion is the process by which soil and rock are removed from the Earth's surface by natural processes such as wind or water flow, and then transported and deposited in other locations.
While erosion is a natural process, human activities have dramatically increased (by 10-40 times) the rate at which erosion is occurring globally. Excessive erosion causes problems such as desertification, decreases in agricultural productivity due to land degradation, sedimentation of waterways, and ecological collapse due to loss of the nutrient rich upper soil layers. Water and wind erosion are now the two primary causes of land degradation; combined, they are responsible for 84% of degraded acreage, making excessive erosion one of the most significant global environmental problems we face today.
Industrial agriculture, deforestation, roads, anthropogenic climate change and urban sprawl are amongst the most significant human activities in regards to their effect on stimulating erosion. However, there are many available alternative land use practices that can curtail or limit erosion—such as terrace-building, no-till agriculture, and revegetation of denuded soils.
Other articles related to "erosion":
... See also Erosion control The most effective known method for erosion prevention is to increase vegetative cover on the land, which helps prevent both wind and water ... Terracing is an extremely effective means of erosion control, which has been practiced for thousands of years by people all over the world ... In addition to significantly reducing wind erosion, windbreaks provide many other benefits such as improved microclimates for crops (which are sheltered from the ...
... Wooldridge employed detailed fieldwork to identify features such as river terraces and erosion surfaces, for example a presumed platform at 200 feet above modern ... on the identification of remnants of three widely developed erosion surfaces a warped sub-Eocene surface a high-level unwarped Neogene peneplain and an unwarped Plio-Pleistocene ... central Weald (through long-term sub-aerial erosion), and the widespread discordant features (as being related to a high-level marine shelf) ...
... Erosion, the removal of material by natural processes Bridge scour, erosion of earth around a bridge via the flow of air, ice, or water Tidal scour, erosion of substrate via tidal forces Ice scour, occurring ...
... Besides controlling erosion, consideration must be given to the effects of hardening a shoreline on natural coastal ecosystems and human property or activities ... events and damage to property caused by erosion ... can disrupt sand movement that can lead to increased erosion down drift from the structure ...
Famous quotes containing the word erosion:
“Inter-railers are the ambulatory equivalent of McDonalds, walking testimony to the erosion of French culture.”
—Alice Thompson (b. 1963)
“What if we fail to stop the erosion of cities by automobiles?... In that case America will hardly need to ponder a mystery that has troubled men for millennia: What is the purpose of life? For us, the answer will be clear, established and for all practical purposes indisputable: The purpose of life is to produce and consume automobiles.”
—Jane Jacobs (b. 1916)
“The new concept of the child as equal and the new integration of children into adult life has helped bring about a gradual but certain erosion of these boundaries that once separated the world of children from the word of adults, boundaries that allowed adults to treat children differently than they treated other adults because they understood that children are different.”
—Marie Winn (20th century)