Encyclopedia > Soil erosion

  Article Content


Redirected from Soil erosion

In physical geography, erosion is the displacement of solids (earth, mud[?], rock and so on) through natural causes. There are several causes of erosion, the most common being water or wind movements. As the material is removed, it is carried to other locations and deposited as silt. This deposition is called sedimentation[?], and most of the silt created by erosion ends up in sediment layers.

Erosion is in itself a naturally occurring process, but it is in many cases increased by human activities. Some of those include deforestation, overgrazing and trail-building[?], activities that may result in soil degradation. Likewise, humans have sought to limit erosion by terrace[?]-building and tree planting.

One of the most serious and long-running water erosion problems on the planet is in China, on the middle reaches of the Yellow River and the upper reaches of the Yangtze River. From the Yellow River, over 1.6 billion tons of sediment flow each year into the ocean. The sediment originates primarily from water erosion in the Loess Plateau region of northwest China. (World Bank 2001: China: Air, Land, and Water).

All Wikipedia text is available under the terms of the GNU Free Documentation License

  Search Encyclopedia

Search over one million articles, find something about almost anything!
  Featured Article
BBC News 24

... News 24 BBC News 24 is the BBC's 24-hour news television channel. It first broadcast in November 1997 and at first only cable television subscribers could ...

This page was created in 23.8 ms