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中文摘要：
目的量化研究土壤侵蚀的巨大危害和由此造成的惊人损失，为生态系统保护提供依据。方法借鉴生态系统服务价值评价的方法，从破坏土壤肥力、增加土地废弃、增加泥沙滞留和淤积3个方面考虑，对土壤侵蚀的损失量及损失价值进行定量计算。结果在南水北调中线工程陕西水源区仅土壤侵蚀造成的土壤价值损失每年就达34亿元，其中肥力损失所占比重最大，安康、商洛和汉中地区的土壤侵蚀价值损失总量和单位价值损失量最多。结论南水北调中线工程陕西水源区的土壤侵蚀是巨大的，必须尽可能减少这些损失。
英文摘要：
Aim Quantitative research on the tremendous compromise and cost of soil erosion provided a basis for ecosystem protection. Methods Using evaluation of ecological value of ecosystem service, the lost and value of soil erosion are accounted which is considered by three sides：destroying soil fertility, augmenting soil abandon, and increasing resort and silt. Results The cost value of soil only reach 3.4 billion yuan, in which the cost of fertility proportion most and the value cost of gross and pre-square kilometer are at best in Ankang, Shangluo and Hanzhong area. Conclusion The soil erosion is very tremendous, it is necessary to reduce these losses.
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