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为对崩岗的其敏感性进行有效评价,在对影响崩岗发生的空间因素进行识别的基础上,应用生态位适宜度模型构建崩岗发生敏感性的评价方法,并对福建省安溪县的小流域进行实证研究。结果表明:各敏感性等级中现有崩岗的发生频率和分布比率分别为0.31%、1%、1.94%和3.67%与4.55%、14.39%、28.03%和53.03%,可以看出这2个值均随崩岗发生敏感性等级的提升呈阶梯性增加,说明该评价方法科学合理;对崩岗发生敏感性贡献较大的空间因子为相对高差、粘粒含量和NDVI。由此提出防范崩岗发生的相关建议:对于敏感性较高的区域需要增加植被、缩小地形落差,对于敏感性较低的区域要严禁不合理的开山以及破坏植被的行为。
In order to evaluate the sensitivity of the collapse and to identify the spatial factors that affect the collapse, the assessment method of the sensitivity to collapse of the ridge was established by using the niche fitness model. Small watershed for empirical research. The results showed that the frequency and distribution rate of existing collapsing were 0.31%, 1%, 1.94% and 3.67%, 4.55%, 14.39%, 28.03% and 53.03% respectively. It can be seen that these two The results showed that the evaluation method was scientific and reasonable. The spatial factors that contributed more to the occurrence of collapse were relative height difference, clay content and NDVI. Therefore, some suggestions are put forward to prevent the occurrence of collapse. For areas with higher sensitivity, vegetation should be added to reduce the topography drop. For less sensitive areas, irrational opening of mountains and destruction of vegetation should be prohibited.