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为探究土壤侵蚀各影响因子在一个较大的地理系统内的组合变化关系,以淮河流域为研究区,通过收集流域内土壤、植被、地形、气候等数据,利用二元相关分析、偏相关分析和通径分析方法,对流域尺度的土壤侵蚀各影响因子进行了分析。结果表明:在流域尺度上,对土壤侵蚀起主导作用的因子是地形起伏度,其次是坡耕地面积比和植被覆盖度。地形起伏度和坡耕地面积比及植被覆盖度之间具有较好的相关性,地形起伏度除直接对土壤侵蚀产生影响外,还通过影响坡耕地的分布和植被覆盖度而对土壤侵蚀产生综合影响。
In order to explore the change relationship of various factors of soil erosion in a large geographical system, taking the Huaihe River Basin as the research area, by collecting the data of soil, vegetation, topography and climate in the drainage basin, the binary correlation analysis, partial correlation analysis And path analysis method, the influencing factors of soil erosion on basin scale are analyzed. The results show that in the watershed scale, the factor that plays a leading role in soil erosion is the relief degree of the terrain, followed by the slope area ratio and vegetation coverage. There is a good correlation between topography relief and slope area and vegetation coverage. Topography relief not only directly affects soil erosion, but also affects soil erosion by affecting the distribution of sloping fields and vegetation coverage influences.