【作者】 韩玲玲；

【导师】 何政伟；

【作者基本信息】 成都理工大学 ， 构造地质学， 2004， 硕士

【摘要】 长江三峡工程是当今世界上最大的水利枢纽工程，论文研究区重庆市奉节县，位于三峡库区的腹地，历史上就是滑坡多发地带，调查研究滑坡的分布、变化规律具有重大的实际意义。采用遥感技术，可以突破传统调查方法的限制，发挥其宏观、综合、直观、快速的特点，取得更好的效果。 论文选取目前应用最广的陆地卫星最新系列Landsat-7 ETM+数据和空间分辨率最高的商业卫星Quickbird数据作为主要的数据源，根据数据的特点及滑坡灾害应用特征，对Quickbird遥感数据则基于1：10000DEM进行了正射校正，对ETM+遥感数据进行了①波段优选，选取了753作为最佳组合波段；②图像增强，通过各种增强处理方法的效果对比，选择主成分分析法对图像进行增强；③几何精校正，纠正图像的几何变形；④影像融合，主要选取了效果较好的HIS空间变换融合和分辨率融合，得到的图像既具有较高的光谱分辨率，同时也具有较高的空间分辨率。经过上述数字处理，较好地改善了图像的视觉效果，提高了图像解译的精度。最后在ETM+图像上对滑坡发育的地质背景进行解译，提取了地形、地层岩性、地质构造等信息，在Quickbird影像上详细地圈定了滑坡灾害体的实体位置及发育范围，通过对所提取信息进行分析，本文认为，奉节县地质构造复杂，岩性破碎；峡谷段岩层稳定性较好；南岸部分地段为顺向岩层分布区，人类工程活动容易诱发顺层滑坡，蓄水后库岸整体稳定性下降。更多还原

【Abstract】 The research area, Fengjie County, is located in the center of Three Gorge Reservoir Area and is a place with landslides frequently occurring in history, so it is of great practical meaning to investigate and study the forming and distribution regularities of landslides there. Investigation using Remote Sensing (RS) technology can breakthrough the limits of traditional methods, make full use of its capability of integration, visualization, rapidity and vast-dimensions analysis, and get better resultsThe paper takes the up-to-date Landsat-7 ETM+ data, which is the most widely used, and Quickbird data, which has the highest resolution nowadays, and according the features of the data and landslides, processes the Quickbird data with 1:10 000 DEM orthophoto correction and the landsat-7 ETM+ data as follows:(1) selecting optimal spectrum band: selects 753 bands as the optimal bands;(2)image intensifying: selects the principle components processing method on the basis of comparing several image intensifying methods;(3)rigour geometric Direction: corrects the geometric distortion of the map;(4)image fusion: mainly takes HIS space transform fusion and resolution fusion method, and acquires maps with higher spectrum resolution as well as space resolution.After that, the visual effect of the image has been enhanced, and the interpretation precision. At last, the paper interprets the geological background of the forming of landslides, and reveals the landform, stratum, lithology and geologic structure based on the ETM+ image. And also, the paper interprets the location and distribution of the specific disaster bodies based On the Quickbird image. Through the analysis of the extracted information, the paper considers: the geologic structure of Fengjie County is complex, and lithology is crashed; the terrane in the canyon segment is fairly stable; the terrane in some segments of the southern bank will be less stable after the water is stored, because the rock is in the same direction and is apt to slip with human project.更多还原