汶川震后地质灾害遥感信息提取及分布特征分析

摘要

以汶川县为研究区,利用遥感、GIS和计算机三维可视化技术,对地质灾害进行了信息提取和解译,共解译滑坡53个,崩塌1 575个,地质灾害面积76.58 km2,并建立了相应的数据库.利用GIS空间分析功能,结合高程、坡度、坡向、地层岩性、地震烈度和水系等因子对研究区地质灾害的空间分布特征进行了分析,并采用层次分析法对研究区地质灾害易发性预测进行了分区研究.研究结果表明,本数据与分析对安置地的重建和地震灾害预测具有很好的参考价值.%Taking to the Wenchuan county as the study area, using RS, GIS and 3D visualization technology, this paper described and discussed the extraction and interpretation of 414.25 km2 in the scope of this area. Wenchuan county has 53 landslides, 1 575 collapses, the area of disasters is 76. 58 km2. This paper used the spatial analysis function of GIS, combined with the spatial distribution of geological hazards elevation, slope, aspect, formation lithology, seismic intensity, water and other factors to analysis the spatial distribution of geological hazards. It also used layered approach for the susceptibility and prediction regional studies. The results show that data and analysis can benefit for the aftercare and earthquake prediction.