| 摘要: |
| 在综合分析忠县滑坡灾害影响因子的基础上，选取地表坡度、地表高程、地形起伏度、距道路远近、距河流远近、汇流累积量以及年均降雨量等7危险评价因子构建忠县滑坡危险评价体系;采用专家系统评分方法对各评价因子进行分级赋值，利用AHP法确定各评价因子权重值，在GIS软件平台上建立各评价因子专题图层；基于综合指数分析方法建立忠县滑坡灾害危险评价综合指数模型，并利用综合指数进行分区评价，最终将忠县滑坡灾害分为微危险、低危险、中危险、高危险4个危险等级区;研究结果表明：忠县滑坡灾害微危险区面积689.18 km2，占总面 |
| 关键词: 滑坡灾害 危险评价 GIS 层次分析法 忠县 |
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| Research on the Landslide Hazard Evaluation of Zhongxian, Chongqing Based on GIS Method |
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LIN Qing, LIN Xiao song, TIAN Jia, HAN Ze
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| Abstract: |
| On the basis of comprehensively analyzing the impact factors of landslides in Zhongxian，seven factors are selected as evaluation indices including surface slope, surface elevation, terrain undulation, the distance to roads, the distance to rivers, flow cumulant of rivers and annual average rainfall.Every indicator is given a value by using the method of expert system; weight of the seven indices are determined by Analytic Hierarchy Process(AHP); a thematic map for every evaluation index is built by GIS.Based on comprehensive index analysis, the index model of the landslide hazard evaluation of Zhongxian is established.Landslide hazards are divided into 4 rating area, ie.micro hazard, low hazard, medium hazard and high hazard according to the zoning evaluation by comprehensive index.The results show that the 4 rating area respectively cover 689.18 km2、643.91 km2、366.13 km2、334.54 km2 respectivel，and each account for 34.39%、32.14%、17.02%、16.45% of the total area.The results also corresponds with the actual situation of landslides in Zhongxian, which can be used to guide the work of landslide prevention and reduction in Zhongxian. |
| Key words: landslide hazard evaluation GIS AHP Zhongxian |
