摘要
为评价县级行政单位土壤侵蚀的严重性,提出了“土壤侵蚀严重性指数”及计算方法,并在计算我国各县级行政单位土壤严重指数数值的基础上,讨论了土壤侵蚀严重指数的分级。土壤侵蚀严重指数不仅全面反映了县域的土壤侵蚀面积,而且区别反映了各级土壤侵蚀强度。土壤侵蚀严重县的分布及其侵蚀面积占全国土壤侵蚀总面积的比重,表明了土壤侵蚀严重指数不仅可以用来比较县与县之间土壤侵蚀严重程度的差异,而且可以评价土壤侵蚀在分布上的集中性。
The authors defined an index of soil erosion severity, calculated its value for each county, and analyzed index classification. Based on these works, 745 counties with sever soil erosion in China were presented. The area and distribution of soil erosion for the counties prove the index of soil erosion severity. The index is the weighted mean of erosion degree and area, which not only reflects erosion area in the round, but also discriminates each grade of soil erosion severity.
出处
《水土保持通报》
CSCD
北大核心
2006年第4期41-43,51,共4页
Bulletin of Soil and Water Conservation
基金
中国水土流失与生态安全综合科学考察
