1. Sheet and rill erosion occurs on sloping land with little ground cover. When it rains water runs down the hill, and without plants to hold the soil in place, the flowing water washes the soil away.
Sheet erosion is when the water removes even layers of soil.
Rill erosion is when the water makes channels up to 30 cm deep.
2. Gully erosion is when water makes a deep channel that washes away soil when it rains. Each time it rains, the channels get deeper as more soil is removed. The soil can wash away into creeks and streams and block the water flow and discolour the water, or damage roads. The loss of topsoil reduces the amount of area available for farming.
3. Mass movement is when the erosion is helped by gravity, including landslides and avalanches. Mass movement not only removes a great deal of earth and rocks, it can destroy houses and farmland.
4.Wind erosion is when the wind lifts and removes topsoil. In dry areas in particular, soil that is not kept in place by plants is easily removed by the wind. Where crops have been grown repeatedly without giving the land a rest, the soil becomes less bound together and easily breaks down and is removed. Where animals have grazed too much or have trampled the earth hard, the plants are no longer holding the soil together, and it can be removed by the wind. The wind dumps the soil elsewhere, and can clog other farmland and roads.
2007-03-09 11:35:06
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answer #1
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answered by lou53053 5
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>>>>>Causes of Soil Erosion<<<<<
http://civcal.media.hku.hk/soilerosion/causes/default.htm
Land Use
Climate
Soil Properties
Hydrology
Landforms
http://en.wikipedia.org/wiki/Soil_erosion
1 Causes
2 Erosion processes
2.1 Gravity erosion
2.2 Water erosion
2.2.1 Shoreline erosion
2.3 Ice erosion
2.4 Wind erosion
There are three main types of soil erosion.
http://civcal.media.hku.hk/soilerosion/types/default.htm
Hope this helps Good Luck!
2007-03-09 20:31:21
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answer #2
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answered by LucySD 7
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From Wikipedia:
2.1 Gravity erosion
2.2 Water erosion
2.2.1 Shoreline erosion
2.3 Ice erosion
2.4 Wind erosion
2007-03-09 19:35:10
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answer #3
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answered by Teacher Man 6
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How about using Google or Ask.com. Hope this helps!!!
2007-03-09 19:46:32
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answer #4
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answered by A question or two... 3
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accelerated-wind, water, animal, human, cropping
geological-rill, gully, sheet
2007-03-09 19:39:38
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answer #5
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answered by Anonymous
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