| 吴碧娟,卜鹏,何旭,郝玉军,杨艳绪,徐思超.祁东县滑坡地质灾害发育特征与孕灾因子分析[J].矿产勘查,2025,16(5):1162-1169 |
| 祁东县滑坡地质灾害发育特征与孕灾因子分析 |
| Development characteristics and disaster-pregnant factors analysis of landslide geological hazards in Qidong County |
| 投稿时间：2024-04-16 |
| DOI：10.20008/j.kckc.202505020 |
| 中文关键词: 滑坡 孕灾因子 随机森林模型 易发性评价中图分类号:P642.22文献标志码:A文章编号:1674-7801(2025)05-1162-08 |
| 英文关键词: landslides disaster-pregnant factors random forest model susceptibility assessment |
| 基金项目:本文受湖南省祁东县栗山矿区建筑石料用灰岩矿勘查项目(20220301)资助。 |
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| 中文摘要: |
| 本文通过对祁东县 150处滑坡地质灾害点分析，归纳出该地区滑坡地质灾害的发育特征；选取高程、坡向、坡度、坡位、地形湿度指数、岩性、归一化植被指数(NDVI)、降雨量、距断层的距离共 9个评价因子进行孕灾分析，并运用随机森林模型开展了区内滑坡地质灾害易发性评价。结果显示，祁东县滑坡主要分布于海拔 100～400 m的丘陵地貌区，地形坡度 25°～60°，集中发生时间在每年的 4—7月，滑坡体主要为土质，滑坡诱因主要是降雨以及人类工程活动；易发生性评价共划分为极低、低、中等、高和极高 5个分区，调查表明，文中孕灾因子与易发性评价与祁东县实际情况相符，可用于指导地质灾害防治管理。 |
| 英文摘要: |
| By analyzing 150 landslide geological hazard points in Qidong County, the development characteris.tics of landslide geological hazards in the area were summarized; Nine evaluation factors, including elevation, slopeorientation, gradient, slope position, terrain humidity index, lithology, normalized vegetation index (NDVI), rainfall,and distance from faults, were selected for disaster prone analysis. A random forest model was used to evaluate thesusceptibility of landslide geological hazards in the area. The results show that landslides in Qidong County aremainly distributed in hilly terrain areas with an altitude of 100 m to 400 m, with a terrain slope of 25° to 60°, and oc.cur mainly from April to July each year. The landslide body is mainly soil, and the main causes of landslides arerainfall and human engineering activities; The susceptibility assessment is divided into five zones: extremely low,low, medium, high, and extremely high. The survey shows that the risk factors and susceptibility assessment men.tioned in the article are consistent with the actual situation in Qidong County and can be used to guide geological di.saster prevention and management. |
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