基于CSLE的南雄市土壤侵蚀评价及主成分因子分析  

Evaluation of Soil Erosion in Nanxiong City Based on CSLE Model and Analysis of Principal Component Factors

作　　者：李新尧 张晓远 刘朱婷 LI Xinyao;ZHANG Xiaoyuan;LIU Zhuting(Guangdong Hydropower Planning & Design Institute Co., Ltd., Guangzhou 510635, China)

机构地区：[1]广东省水利电力勘测设计研究院有限公司,广州510635

出　　处：《广东水利水电》2022年第7期66-69,共4页Guangdong Water Resources and Hydropower

基　　金：广东省水利科技创新项目(编号:2017-01)。

摘　　要：采用中国土壤流失方程定量研究南雄市土壤侵蚀空间分布特征,并分析各侵蚀因子的贡献度。结果表明:南雄市土壤侵蚀面积为242.37 km2,占市域总面积的10.09%。侵蚀强度以轻度为主,占土壤侵蚀总面积的93.61%,主要分布于南雄盆地周边坡度较大的有林地或疏林地;中度及以上侵蚀面积占比较小,分布于受人为活动影响较大的人为扰动用地。7个土壤侵蚀因子可归为4个主成分,其对研究区土壤侵蚀的贡献度由高到低分别为:降雨侵蚀力因子(R)、坡度因子(S)、坡长因子(L)、工程措施因子(E)、植被覆盖与生物措施因子(B)、土壤可蚀性因子(K)和耕作措施因子(T)。The spatial distribution characteristics of soil erosion in Nanxiong City were quantitatively studied by using CSLE model,and the contribution of each erosion factor was analyzed.The results showed that the area of soil erosion in Nanxiong City was 242.37 km2,accounting for 10.09%of total area of the city.The erosion intensity was mainly mild,accounting for 93.61%of the total area of soil erosion,which was mainly distributed in woodland with large slope or sparse woodland around Nanxiong Basin.The area of moderate or more severe erosion accounts for relatively small proportion,which was distributed in artificially disturbed land greatly affected by human activities.The seven soil erosion factors can be divided into four principal components,and their contribution to soil erosion from high to low were:R,S,L,E,B,K,T.

关 键 词：CSLE 主成分分析 土壤侵蚀 影响因子 南雄市 

分 类 号：S157[农业科学—土壤学]