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采用遥感(RS)与地理信息系统(GIS)相结合的手段和方法,分析了汶川地区区域地质概况、主要构造带的分布性状,以及2008年5月12日地震后大型滑坡、泥石流、堰塞湖等地质灾害的发育特征。在上述工作完成的基础上,进一步开展室内外综合研究,从遥感宏观分析角度通过对地质灾害分布特征以及与地震、地貌、地层、岩性、构造等相互关系的综合分析,利用证据权重法对区域地质灾害发生发展的空间性做出定量的综合评价,并依此提出对研究区的灾害治理进行分级,随后给出治理的建议。
By means of combining remote sensing (RS) and geographic information system (GIS), the paper analyzes the regional geology and the distribution of the main tectonic belts in Wenchuan area, as well as the major landslides, debris flows, damming after the earthquake on May 12, 2008 Lake and other geological disasters development characteristics. On the basis of the completion of the above work, further study on the indoor and outdoor areas was conducted, and from the perspective of macro-analysis of remote sensing, through comprehensive analysis of the distribution characteristics of geological disasters and their correlation with earthquakes, geomorphology, stratigraphy, lithology and tectonics, This paper presents a comprehensive evaluation of the spatial characteristics of the occurrence and development of regional geological disasters. Based on this, it puts forward to classify the disaster management in the research area and then gives some suggestions on governance.