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土壤加速侵蚀被广泛认为是一个全球性问题。目前的问题在于向量——范围、侵蚀强度、侵蚀速率以及经济与环境的后果的可靠评价及其准确性。文献中的资料往往来自于勘察和调查以及根据大概的资料进行的推测。美国迪得逊计算出河流带入海洋中的泥沙量从有集中农业、牧业和其它活动前的100亿t增加到以后每年250亿~500亿t。杜得勒指出,由于土壤侵蚀以及其它因素影响,全世界现有农地退化速
Soil erosion is widely recognized as a global problem. The current problem lies in the reliable evaluation of the vector-range, erosion intensity, erosion rate and economic and environmental consequences and their accuracy. The information in the literature often comes from surveys and surveys as well as from speculations based on general information. The United States calculated that the volume of sediment that rivers brought into the oceans increased from 10 billion tons before concentrated agriculture, animal husbandry and other activities to 25 billion to 50 billion tons annually. Duderle pointed out that due to soil erosion and other factors, the world’s existing agricultural land degradation rate