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土地利用是人类活动与自然交叉最紧密的领域,不合理的土地利用方式对滑坡和泥石流等山地灾害具有明显的促进作用。选择小江流域为研究区,通过定量分析不同立地类型组中土地利用方式对滑坡的敏感性,发现易致灾的土地利用方式有:高海拔立地类型组中的旱地、密林地、疏林地、中盖度的草地、未利用地,中海拔立地类型组中的旱地、工矿交通用地、未利用地、中盖度的草地,低海拔立地类型组中的疏林地、高/中盖度草地、未利用地,它们的敏感性值均等于或大于0.5,易导致滑坡灾害的发生。并以敏感性值为依据进行了敏感性分区,可为流域土地利用方式选取、水土保持工程布局和山地灾害生物工程治理提供参考。
Land use is the most cross-linked area between human activities and nature. The irrational use of land has obvious promotion effects on landslides such as landslide and debris flow. By choosing the Xiaojiang River Basin as the research area, by quantitatively analyzing the sensitivity of land use to landslide in different types of site groups, it is found that the vulnerable land use types are: dry land, jungle land, Grassland, unused land, dry land in mid-altitude stand-type group, land for industrial and mining traffic, unutilized land, mid-covered grassland, sparse woodland in low-lying site type group, high / mid-covered grassland, Land use, their sensitivity values are equal to or greater than 0.5, easily lead to landslide disaster. Sensitivity values were used as a basis for sensitivity zoning, which could provide reference for the selection of land use patterns, soil and water conservation engineering layout and the management of mountainous areas and bioengineering.