滇东南岩溶区土壤侵蚀敏感性分析及其空间分异特征

以滇东南岩溶区独特的地理环境作为研究对象,根据《生态功能区划暂行规定》和国内外已有的土壤侵蚀敏感性的研究成果,选择地形起伏度(LS)、植被覆盖度(C)、土壤质地(K)3个自然因子作为滇东南岩溶区土壤侵蚀敏感性评价的指标,在GIS时空分析功能支持下,以《生态功能区划暂行规定》的敏感性等级标准为依据,分析各个因子对土壤侵蚀敏感性的影响,并结合研究区域实地情况对各个因子分别进行土壤侵蚀敏感性的评价。在各因子单独分析的基础上运用GIS的空间分析功能,根据这些敏感因子对侵蚀敏感性影响程度的不同分配、不同权重,进行综合分析评价,得到不同敏感程度区域的面积和空间分异特征。

Sensitivity Analysis and Spatial Differentiation Characteristics of Soft Erosion in Karst Area of Southeastern Yunnan

This article is based on the unique geographical environment of karst area in southeastern Yunnan,and according to the Interim Provisions on ecological function zoning and existing research results about soil erosion sensitivity at home and abroad,choosing three natural factors-topographic relief (LS),vegetation coverage (C) and soil texture (K) as indicators of soil erosion sensitivity in karst area of Southeastern Yunnan.With the space-time analysis function in GIS and on the basis of Interim Provisions on ecological function zoning,the author will analyst and evaluate the effects of various factors on soil erosion sensitivity dated on the real situation.And based on the results of factor analyst separately,using the space-time analysis function,assign the factors'weights according its influence,and then comprehensive analysis and evaluation to get the different characteristics in area and space on different sensitive area.