| 嘉陵江流域北碚段基于GIS平台的地质灾害易发性评价 |
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| 引用本文： | 张朝洪,廖根权,徐曙林.嘉陵江流域北碚段基于GIS平台的地质灾害易发性评价[J].地质灾害与环境保护,2009,20(3):45-49. |
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| 作者姓名： | 张朝洪 廖根权 徐曙林 |
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| 作者单位： | 重庆市地质灾害防治工程勘查设计院,重庆,400700 |
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| 摘 要： | 基于GIS平台．选取坡度、岩性、河流距离、曲率共4个地质灾害致灾因子，采用多因子综合分析方法，对嘉陵江流域北碚段进行地质灾害易发性分区。按照地质灾害的易发性分级，将2343．6km^2范围的研究区划为4类，其中低易发区面积为141．82km^2，中易发区面积为1162．47km^2，高易发区面积为914．95km^2，极高易发区面积为124．38km^2。最后应用野外地质灾害调查结果对分区结果进行验证，位于极高易发区与高易发区的灾害点分别占全部灾点的59．7％与28．2％，共为87．9％，且几处大型的滑坡、堆积体、危险库岸都位于极高易发区．表明研究成果比较客观。
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| 关 键 词： | 地质灾害 易发性区划 GIS |
GIS BASED GEOLOGICAL HAZARD SUSCEPTIBILITY IN JIALING RIVER WATERSHED,BEIBEI SECTION |
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| ZHANG Chao-hong,LIAO Gen-quan,XU Shu-lin.GIS BASED GEOLOGICAL HAZARD SUSCEPTIBILITY IN JIALING RIVER WATERSHED,BEIBEI SECTION[J].Journal of Geological Hazards and Environment Preservation,2009,20(3):45-49. |
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| Authors: | ZHANG Chao-hong LIAO Gen-quan XU Shu-lin |
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| Institution: | (Chongqing Reconnaissance and Design Academy of Geological Disasters Prevention and Treatment Engineering,Chongqing 400700, China) |
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| Abstract: | This paper presents a GIS-based method for geological hazards susceptibility at a regional scale. Most of the input data for the susceptibility assessment have been captured automatically. A total of 4 parameters, related to the slope degree and curvature, have been derived from the DEM , and the lithology and river network are derived from 1 ： 500000 geological maps. The result of susceptibility of geological hazards is divided into four types, which are extreme high susceptibility, high susceptibility, mid-susceptibility and low susceptibility. The susceptibility map is obtained by multivariate analysis method. The results of the susceptibility map have been checked with landslides by field investigation. |
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| Keywords: | GIS |
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