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Soil erosion response to climatic change and human activity.pdf
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Soil erosion response to climatic change and human activity.pdf soil erosion during the transition from dry-cool to wet-warm climates was more intense than during wet-warm and cool-dry climatic episodes, but serious accelerated soil erosion has occurred during the last 2,500 years because of man-induced devastation of vegetation and other anthropogenic disturbance of the environment. Modern rates of soil erosion on the Loess Plateau are a combination of both intensive natural and human-induced erosions andare some four times greater than occurred in the geological past. The recent implementation of soil and water conservation measures has decreased sediment load in the Yellow River by 25%. |
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2楼2007-09-30 02:20:55
5楼2008-01-09 14:00:17
简单回复
2007-10-02 15:55
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谢谢分享
deanxiao4楼
2008-01-09 13:31
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