左江流域土壤侵蚀敏感性评价研究  

Sensitivity Evaluation of Soil Erosion of Zuojiang River Basin

作　　者：苏文静[1] 卢远[1] 

机构地区：[1]广西师范学院资源与环境科学学院,广西南宁530001

出　　处：《中国水土保持》2011年第11期35-37,66,共3页Soil and Water Conservation in China

基　　金：国家自然科学基金项目(40761027)

摘　　要：以通用土壤流失方程(USLE)为基础,结合左江流域的自然环境特征,选择降雨侵蚀力(R)、地形(LS)、植被覆盖(C)与土壤质地(K)4个因子,建立流域土壤侵蚀敏感性评价指标与分级标准。在GIS软件支持下通过多因子叠加计算得到流域土壤侵蚀敏感性评价结果,将土壤侵蚀敏感性划分为弱敏感、轻度敏感、中度敏感、高度敏感、极敏感5个等级,并分析各等级的空间分布格局。结果表明:土壤侵蚀敏感性较高的区域主要分布在流域西北部的岩溶石山地区,而中部、南部的河谷平原、盆地、丘陵谷地、台地等地势相对平缓的区域敏感性较低。The paper established indexes and classification standard for sensitivity evaluation of soil erosion of Zuojiang River Basin on Universal Soil Loss Equation(USLE),through study on natural environment characteristics and selected four factors of rainfall erosion force(R),topography(LS),vegetation cover(C) and soil texture(K).It obtained the results of sensitivity evaluation of soil erosion of the basin through multi-factor superposition calculation with the support of GIS software,and divided the sensitivity into five levels of weak,light,moderate,high and extreme and analyzed the spatial distribution pattern of each level.The outcomes show that the area where the sensitivity is higher mainly distribute in karst mountain region in the northwest of the basin and the sensitivity of river valley,basin,hilly-gully and tableland with relative gentle topography located in the central and south of the basin is lower.

关 键 词：土壤侵蚀 敏感性评价 左江流域 

分 类 号：S157[农业科学—土壤学]