| 西陵峡水田坝区域地质灾害发育特征及成因机制 |
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| 引用本文： | 刘广宁,齐信,黄波林,王世昌.西陵峡水田坝区域地质灾害发育特征及成因机制[J].水土保持通报,2017,37(1):319-324. |
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| 作者姓名： | 刘广宁 齐信 黄波林 王世昌 |
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| 作者单位： | 中国地质调查局 武汉地质调查中心,湖北 武汉,430205 |
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| 基金项目： | 国家自然科学基金项目“基于水波动力学的水库崩塌滑坡涌浪研究”（41372321）；中国地质调查局灾害预警项目（12120114079301）；水工环地质调查项目（DD20160257） |
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| 摘 要： | 目的]掌握西陵峡水田坝区域地质灾害发育特征及成因机制,为该区域地质灾害防治提供依据。方法]对地质灾害的类型、规模、斜坡结构、岩性特征、分布高程、地形坡度进行详细的野外调查,并运用统计学进行梳理分析。结果]研究区发育主要地质灾害为滑坡、崩塌(危岩)和不稳定斜坡,其规模以中小型为主。空间上分布不均匀,且集中分布在海拔高度300~800m的区域,坡度20°~40°斜坡区域,并沿主要构造、断裂呈条带状发育;绝大多数灾害发育在侏罗系蓬莱镇组(J3p)、遂宁组(J3s)和沙溪庙组(J2s)岩性段中,以顺向结构岸坡中发育地质灾害居多;时间上,地质灾害多集中发生在降雨集中汛期6—9月。结论]地质灾害成因机制的内在因素为地形地貌、地层岩性、岸坡结构类型和地质构造;外在因素为降雨、库水波动和人类工程活动。
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| 关 键 词： | 地质灾害 发育特征 成因机制 |
| 收稿时间： | 2016/3/15 0:00:00 |
| 修稿时间： | 2016/7/19 0:00:00 |
Development Characteristics and Mechanism of Regional Geohazards in Shuitianba Area of Xiling Gorge |
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| LIU Guangning,QI Xin,HUANG Bolin and WANG Shichang.Development Characteristics and Mechanism of Regional Geohazards in Shuitianba Area of Xiling Gorge[J].Bulletin of Soil and Water Conservation,2017,37(1):319-324. |
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| Authors: | LIU Guangning QI Xin HUANG Bolin and WANG Shichang |
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| Institution: | Wuhan Centre of China Geological Survey, China Geological Survey, Wuhan, Hubei 430205, China,Wuhan Centre of China Geological Survey, China Geological Survey, Wuhan, Hubei 430205, China,Wuhan Centre of China Geological Survey, China Geological Survey, Wuhan, Hubei 430205, China and Wuhan Centre of China Geological Survey, China Geological Survey, Wuhan, Hubei 430205, China |
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| Abstract: | Objective] The objective of this study is to investigate the development characteristics and mechanism of the regional geological hazards in Shuitianba area in the Xiling Gorge, and to provide the basis for preventing and controlling geological disasters in the region. Methods] The type, size, slope structure, lithology, elevation distribution and slope gradient of geological disasters were investigated in detail, and statistical analysis was done. Results] The major geological disasters include landslides, collapses(dangerous rock) and unstable slopes, and vary from small to medium-sizes. Spatially, regional distribution was not uniform, geological disasters more developed in elevation between 300~800 m with slope range from 20° to 40 ° and belt-like geological disasters developed along the main structure and fracture. The vast majority of geological disasters were formed in three stages: Penglaizhen formation(J3p), Suining formation(J3s) and Shaximiao formation(J2s) in the lithology of Jurassic, and mostly distributed in bedding slope. The geological disasters mostly occur in flooding season from June to September. Conclusion] The internal factors affecting the formation of the geological disasters include topography, lithology, slope structure type and geological structure while external factors include rainfall, reservoir water fluctuation and engineering activities by human beings. |
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| Keywords: | geological disasters development characteristics formation mechanism |
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