文献类型：期刊文献

中文题名：三峡库区土壤可蚀性K值研究

英文题名：Soil erodibility K value in Three Gorges Reservoir Area

作者：吴昌广[1] 曾毅[1] 周志翔[1] 王鹏程[1,2] 肖文发[2] 罗翀[1]

第一作者：吴昌广

机构：[1]华中农业大学园艺林学学院;[2]中国林业科学研究院森林生态环境与保护研究所

年份：2010

卷号：8

期号：3

起止页码：8-12

中文期刊名：中国水土保持科学

外文期刊名：Science of Soil and Water Conservation

收录：CSTPCD;;CSCD:【CSCD_E2011_2012】；

基金：国家“十一五”林业科技支撑计划项目“三峡库区景观生态防护林体系构建技术试验示范”(2006BAD03A1301);“林业生态工程生态效益监测评价”(2006BAD03A0710);长江三峡库区(秭归)森林生态定位站资助

语种：中文

中文关键词：土壤可蚀性;K值估算;质地转换;土壤侵蚀;三峡库区

外文关键词：soil erodibility; K value estimation; texture conversion; soil erosion; Three Gorges Reservoir Area

分类号：S157.1

摘要：研究土壤可蚀性K值有助于宏观判断和定量分析三峡库区土壤侵蚀的特点。依据重庆市和湖北省的第2次土壤普查资料,建立三峡库区各土种的理化性质数据库,并通过三次样条插值方法对不同粒径标准的土壤质地进行转换,然后采用几何平均粒径模型修正公式计算出三峡库区各土种的可蚀性K值,经面积加权平均得到三峡库区11类土壤的可蚀性K值,最后在分类分级基础上,探讨土壤可蚀性K值的分布特征。结果表明：三峡库区土壤可蚀性K值变化于0.007 2-0.019 2 t.hm^2.h/（MJ.mm.hm^2）之间,其中在0.015 0-0.019 0 t.hm^2.h/（MJ.mm.hm^2）之间的中高可蚀性和高可蚀性土壤面积占库区总面积的74.49%;三峡库区存在很大的土壤侵蚀风险,国外已有的K值经验算式不能直接照搬,而采用几何平均粒径修正模型对三峡库区土壤可蚀性K值进行估算是可行的。
The study of soil erodibility K value in Three Gorges Reservoir Area provides useful information for soil erosion prediction and eco-rehabilitation.Based on the second soil survey information of Chongqing Municipality and Hubei Province,the physiochemical properties database of various soil local type for Three Gorges Reservoir Area was established,and the soil texture in different particle criterions was converted by means of cubic spline interpolation.Then using the revised geometric mean particle model to calculate erodibility K values of various soil local types,and the erodibility K values of 11 soil types in Three Gorges Reservoir Area were obtained in terms of area weighted averages method.At last,the distribution characteristic of erodibility K value was discussed according to classification and gradation.The results showed that the soil erodibility K values were 0.0072-0.0192t·hm^2·h/（MJ·mm·hm^2）,and the area percentage of middle-high erodibility and high erodibility was about 74.49% of the total area,which erodibility K values were ranging from 0.0150 to 0.0190t·hm^2·h/（MJ·mm·hm^2）.All of the above show that the risk of soil erosion in Three Gorges Reservoir Area is serious,and the revised geometric mean particle model performed better than the existing experience formula for estimation of soil erodibility K value in Three Gorges Reservoir Area.