基于生态位适宜度的南方花岗岩区崩岗发生敏感性评价方法

发布时间：2018-05-18 08:08

本文选题：生态位适宜度 + 敏感性　；参考：《中国农业大学学报》2017年10期

【摘要】：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。
[Abstract]:In order to effectively evaluate the sensitivity of collapse, based on the identification of spatial factors affecting the occurrence of collapse, the niche suitability model was used to construct a method for evaluating the sensitivity of collapse. And carries on the demonstration research to the small watershed of Anxi County, Fujian Province. The results showed that the frequency and distribution ratio of the current collapse were 0.31% and 3.67%, respectively, and 4.555.35% and 14.39%, 28.03% and 53.03, respectively. It can be seen that the two values increase step by step with the improvement of the sensitivity grade of the collapse. This indicates that the evaluation method is scientific and reasonable. The relative height difference, clay content and NDVI were the most important spatial factors contributing to the sensitivity to the occurrence of caving. Therefore, some suggestions are put forward to prevent the occurrence of collapse: for the highly sensitive areas, the vegetation should be increased, the topographic drop should be reduced, and the unreasonable mountain opening and vegetation destruction should be strictly prohibited for the less sensitive areas.
【作者单位】：福建农林大学资源与环境学院;福建省土壤环境健康与调控重点实验室;
【基金】：国家自然科学基金项目(41601557;41571272) 国家科技支撑计划项目(2014BAD15B0303)
【分类号】：S157

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