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汶川8.0级特大地震震区位于地质条件复杂、新构造运动活跃的四川省龙门山地区,此次地震是建国以来中国大陆发生的破坏性最严重的地震,造成了崩塌、滑坡、泥石流和堰塞湖等一系列次生地质灾害。分析和掌握次生地质灾害的分布与活动特征,可为灾区工程整治方案和防治措施提供科学的依据,为灾后重建选址提供参考,为其它地区灾害防治方案的制定提供借鉴。项目综合利用不同时相、不同传感器的光学影像和雷达影像以及其它地质地理资料,在相关遥感和地理信息软件的支持下,进行遥感图像专题信息解译和分析,获取了地震中四川省的10个极重灾县市的次生地质灾害解译数据,以此为基础探讨地震次生地质灾害的空间分布特征、发育特点与相关地质地理因素关系。结果表明,地震次生地质灾害与特定的地层岩性、构造破碎带、坡度等有着密切的联系。
The Wenchuan 8.0 earthquake hit the earthquake area in Sichuan Province, where the geological conditions are complex and the neotectonic movement is active. The earthquake was the most devastating earthquake in mainland China since the founding of the People’s Republic of China, causing collapses, landslides, landslides, and weir Lake and a series of secondary geological disasters. Analyzing and grasping the distribution and activity characteristics of secondary geological disasters can provide a scientific basis for remediation programs and prevention and control measures in disaster areas and provide references for post-disaster reconstruction and site selection so as to provide reference for the formulation of disaster prevention and control plans in other regions. The project comprehensively uses the optical images and radar images of different sensors and other geo-geography data to carry out the interpretation and analysis of thematic information of remote sensing images with the support of relevant remote sensing and geographic information software, and obtains the data of 10 Based on the data of secondary geological disasters in the extremely severely affected counties and cities, the spatial distribution characteristics and development characteristics of secondary geological disasters and the related geo-geography factors are discussed. The results show that there is a close relationship between secondary geological disasters and specific lithology, structural fractures and slope.