【摘要】 长江三峡作为世界上最大的水利工程,引起了世界的广泛关注。水库堤岸的长度、水库容载力、三峡移民数量以及其对生态环境的影响都成为议论的焦点。最引人注目的是长江两岸存在大量的地质灾害,如:滑坡、崩塌等,其中有些大型灾害体目前仍处于活动状态,这将给三峡工程的安全与库岸稳定性以及库区生态环境带来深远的影响。因此,采用3S和多时相TM、SPOT、ERS-SAR和RADARSAT等图像集成新技术来快速有效地监测、研究和评估地质灾害对三峡工程以及周边环境的影响,为地质灾害的预防和治理提供科学依据,本成果具有重要的学术意义和实用价值。更多还原

【Abstract】 Multi-temporal SPOT images, ERS-SAR image, Radarsat images and Landsat TM images were applied in the study. The ARSIS method was mainly used to make fusion of the SPOT XS and Panchromatic images, achieving high quality of image results. many new geological, structural features and hazard phenomenon are found, achieving remarkable results: (1) An orthophotomap is a new type of map that is accurately corrected for geometry and is composed with a simplified topographic map. In this study, fusion of Landsat TM, SPOT and ERS SAR images was done. Then utilizing RS-OrthoMapper v1.0 software, which was explored by the authors, three kinds of orthophotomap were made, which were respectively 1:250000 map of Kaixian, 1:100000 map of Baishahe and 1:50000 map of Yunyangxian. The last one is an orthophotomap of fusion image of TM453 and SPOT panchromatic band, whose ground resolution is 10 meter, and DEM used in the rectification come from SPOT stereopairs.(2) In the study of Wanxian—Yunyang district, through fusion’s of the Landsat TM 4,5,3 images and SPOT P image, a lot of the best image results with high spatial resolution of 10m and being affluent in colors were obtained. With the method of 3D-visualizing of remote sensing images and imaging dynamical analysis, 3D-visualizing maps of landslides and the landform relief, with a high resolution RS image and being projected from different directions, were established. With which, quantitative analysis as extracting information of landslides, drawing a section of landform and detecting DEM of some objects can be done directly and rapidly.(3) In the study of Wanxian—Wushan test region, with the theory and method of phase-separation analysis of remote sensing information field, which was proposed by the authors, geological and structural features were systematically interpreted with remote sensing images and the linear and circular structures were quantitatively analyzed. With a synthesizing analysis of the combined folds, faults and related major joint systems, four periods of structural deformation and the resulted deformation fields were determined. As a result, four tectonic stress fields were recovered.更多还原