基于GIS技术和频率比模型的三峡地区秭归向斜盆地滑坡敏感性评价
发布时间：2018-07-20 19:12
【摘要】：以三峡地区秭归向斜盆地为研究区,在野外滑坡编图的基础上,选择地形坡度、地层岩性、河流、道路、坡向、坡型结构6个因子参与滑坡敏感性评价,运用GIS空间分析技术,引入频率比模型,分别计算评价因子的贡献率,并进行叠加分析,最终划分为4个敏感性分区。评价结果表明:极高敏感性区面积占21.39%,滑坡发生面积占61.44%;高敏感性分区面积占24.99%,滑坡发生面积占21.67%;中敏感性分区面积占30.66%,滑坡发生面积占13.19%;低敏感性分区面积占22.93%,滑坡发生面积占3.69%。滑坡敏感性面积累计百分比曲线图表明评价结果具有较高的准确度和可靠性。研究成果可为政府部门减灾防灾工程提供科学支持,为滑坡灾害的预测和管理提供科学依据。
[Abstract]:Taking Zigui syncline basin in the three Gorges area as the study area, based on the mapping of landslide in the field, six factors, including terrain slope, stratigraphic lithology, river, road, slope direction and slope structure, are selected to participate in the landslide sensitivity evaluation, and GIS spatial analysis technique is used. The frequency ratio model was introduced to calculate the contribution rate of the evaluation factors, and the superposition analysis was carried out. Finally, four sensitive zones were divided. The results show that the area of extremely high sensitivity area is 21.39, the area of landslide occurrence is 61.4444; the area of highly sensitive zone is 24.99, the area of landslide occurrence is 21.67; the area of middle sensitive zone is 30.66, the area of landslide occurrence is 13.19; the area of low sensitive zone is 24.99; the area of landslide occurrence is 21.67; 22.93, the area of landslide is 3.69. The cumulative percentage curve of landslide sensitivity area shows that the evaluation results have high accuracy and reliability. The research results can provide scientific support for the engineering of disaster reduction and prevention of government departments and provide scientific basis for the prediction and management of landslide disasters.
【作者单位】： 中国地质调查局武汉地质调查中心;
【基金】：中国地质调查局“三峡库区巴东段岸坡改造调查”项目(12120114079301)
【分类号】：P642.22
本文编号：2134488
[Abstract]:Taking Zigui syncline basin in the three Gorges area as the study area, based on the mapping of landslide in the field, six factors, including terrain slope, stratigraphic lithology, river, road, slope direction and slope structure, are selected to participate in the landslide sensitivity evaluation, and GIS spatial analysis technique is used. The frequency ratio model was introduced to calculate the contribution rate of the evaluation factors, and the superposition analysis was carried out. Finally, four sensitive zones were divided. The results show that the area of extremely high sensitivity area is 21.39, the area of landslide occurrence is 61.4444; the area of highly sensitive zone is 24.99, the area of landslide occurrence is 21.67; the area of middle sensitive zone is 30.66, the area of landslide occurrence is 13.19; the area of low sensitive zone is 24.99; the area of landslide occurrence is 21.67; 22.93, the area of landslide is 3.69. The cumulative percentage curve of landslide sensitivity area shows that the evaluation results have high accuracy and reliability. The research results can provide scientific support for the engineering of disaster reduction and prevention of government departments and provide scientific basis for the prediction and management of landslide disasters.
【作者单位】： 中国地质调查局武汉地质调查中心;
【基金】：中国地质调查局“三峡库区巴东段岸坡改造调查”项目(12120114079301)
【分类号】：P642.22
【相似文献】
相关期刊论文 前3条
1 杨志坚;太湖湖西洞天福地[J];火山地质与矿产;2001年03期
2 于绍周;观音阁水库库首右岸可能渗漏的初步分析[J];中国岩溶;1986年01期
3 ;[J];;年期
相关硕士学位论文 前1条
1 孔春梅;离石向斜盆地地下岩溶水库建库条件分析及库区水位预报[D];太原理工大学;2011年
，本文编号：2134488
本文链接：https://www.wllwen.com/guanlilunwen/gongchengguanli/2134488.html
