| 基于GIS的白龙江流域甘肃段滑坡易发性评价 |
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| 引用本文： | 杜国梁,张永双,高金川,孙於春,郭长宝.基于GIS的白龙江流域甘肃段滑坡易发性评价[J].地质力学学报,2016,22(1):1-11. |
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| 作者姓名： | 杜国梁 张永双 高金川 孙於春 郭长宝 |
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| 作者单位： | 中国地质科学院地质力学研究所, 北京 100081;中国地质大学工程学院, 武汉 430074;甘肃省地质环境监测院, 兰州 730050;中国地质科学院地质力学研究所, 北京 100081;中国地质大学工程学院, 武汉 430074;甘肃省地质环境监测院, 兰州 730050;中国地质科学院地质力学研究所, 北京 100081 |
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| 基金项目： | 国家科技部基础性工作专项(2011FY110100-2);中国地质调查局地质调查项目(1212010914025);国家自然科学基金项目(41072269) |
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| 摘 要： | 在甘肃省白龙江流域地质灾害资料收集及现场调查的基础上,统计分析了该区滑坡发育与地层岩性、坡度、坡向、高程、断裂、植被等因素之间的关系,建立了白龙江流域滑坡易发性评价指标体系。采用基于GIS的层次分析法评价模型,完成了滑坡易发性分区评价,将研究区滑坡按易发程度划分为高易发区、中易发区、低易发区和极低易发区,其中,高易发区占研究区总面积的13.59%,主要分布在断裂带、白龙江两侧以及软弱岩土体分布的区域;中易发区占27.85%;主要分布在白龙江支流以及主要道路两侧的一定范围内;低易发区占33.09%,主要分布在海拔相对较高、植被覆盖度较高、基本上无断裂带通过的区域;其余区域为极低易发区,占25.46%。对比分析显示评价结果与实际滑坡发育情况吻合,可以较好地反映区内滑坡灾害发育的总体特征。
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| 关 键 词： | 滑坡 易发性 GIS 层次分析法 白龙江流域 |
| 收稿时间： | 2015/8/7 0:00:00 |
LANDSLIDE SUSCEPTIBILITY ASSESSMENT BASED ON GIS IN BAILONGJIANG WATERSHED, GANSU PROVINCE |
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| DU Guo-liang,ZHANG Yong-shuang,GAO Jin-chuan,SUN Yu-chun and GUO Chang-bao.LANDSLIDE SUSCEPTIBILITY ASSESSMENT BASED ON GIS IN BAILONGJIANG WATERSHED, GANSU PROVINCE[J].Journal of Geomechanics,2016,22(1):1-11. |
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| Authors: | DU Guo-liang ZHANG Yong-shuang GAO Jin-chuan SUN Yu-chun and GUO Chang-bao |
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| Institution: | Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China;Faculty of Engineering, China University of Geosciences, Wuhan 430074, China;Gansu Geological Environmental Monitoring Institute, Lanzhou 730050, China;Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China;Faculty of Engineering, China University of Geosciences, Wuhan 430074, China;Gansu Geological Environmental Monitoring Institute, Lanzhou 730050, China;Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China |
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| Abstract: | Based on geohazard data collections and field investigations in Bailongjiang watershed, this paper analyzed the statistical relationship of lithology, slope gradient, slope aspect, elevation, drainages, faults, vegetation coverage and landslide occurrence. The evaluation index system of susceptibility assessment was established and the landslide susceptibility assessment in Bailongjiang watershed was accomplished by using AHP method. The landslide susceptibility map was classified into four classes: very low, low, moderate, and high. The high landslide susceptibility areas, 13.59% of the study area, were mainly distributed along the faults and Bailongjiang River, and in the regions characterized by presence of soft rocks. The moderate landslide susceptibility areas, covering 27.85% of the study area, were mostly along the main roads and tributaries of the Bailongjiang River. The low landslide susceptibility areas, accounting for 33.09%, had relatively high elevation and vegetation coverage, and there were no faults passing through. The rest were very low landslide susceptibility areas, making up 25.46% of the study area. The results from the evaluation coincided well with the previous landslide occurrence, which could reflect general characteristics of landslide hazard development. |
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| Keywords: | landslide susceptibility assessment GIS AHP Bailongjiang watershed |
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