According to the strength of the erosion, the light soil erosion area is 1.62 km2; the medium level 800000 km2; the serious level 430000 km2; the rather serious level 330000 km2; and the extraordinary level 380000 km2.

• 按流失强度分，全国轻度水土流失面积为162万平方公里，中度为80万平方公里，强度为43万平方公里，极强度为33万平方公里，剧烈为38万平方公里。