摘要
利用地面控制点及DEM数据对以ETM为主的遥感数据进行了几何精校正,形成了调查区的正射影像;采用人机交互解译辅以实地验证的方法技术,查明青藏公路和铁路沿线50km宽的条带内有覆盖面积大于0 01km2的滑坡552处,它们可分为5个类型,主要分布在青藏线南段及远离交通线的位置。岩类岩性、活动断裂、地形、冻土是影响本区滑坡发育的主要地质环境因素,气候也有重要作用。约占总数10%的滑坡分别在7个地段穿过或接近公路和铁路线,可能会影响交通安全,须进一步调查及监测。
With ETM data, ground control points and DEM, ETM ortho-imags of the study area of Qing-Zang highway and railway line, based on the images by using Men-PC interact interpretation technique and site verifying combined results, 552 landslides (each covers more than 0.01 km^2) and their developing environment have been obtained. The landslides in the study area can be divided into 5 types, mainly distribute in the southern section of Qing?-Zang line and most of them are far away from the line. Geological environment factors such as rock category, lithology, active faults, geomorphologic features and frozen soil have made a notable impact on landslides developing in the study area. Climate also has a big influence on the landslides. About 10% of the total landsides distribution in the 7 sites of the line pass through or close to the line that may cause severe influence on safety. Further survey and monitoring for these landslides should be conducted.
出处
《现代地质》
CAS
CSCD
2003年第4期355-362,共8页
Geoscience
基金
国土资源部国土资源大调查项目(70701207015)。
关键词
遥感
滑坡
地质环境
公路
青藏铁路
Qing-Zang line
remote sensing
landslide
geological environment
