基于GF-1数据的地质灾害遥感调查——以青海省大通县为例

摘要

遥感技术具有时效性强且经济便捷等优势,已经成为地质灾害调查的重要手段.为了查明青海省大通县境内地质灾害的发育特征、分布规律,遥感调查利用GF-1、LANSAT8 OLI和DEM数据构建三维可视化遥感解译平台,对大通县进行全面的地质灾害调查,重点对滑坡、泥石流等进行解译.详细阐述了区内灾害体的遥感特征和分布特征,共解译出各类地质灾害影像体399处,其中崩塌6处、滑坡100个、古滑坡54个、泥石流87个、不稳定斜坡140处、危险陡坎和陡崖12处,通过野外验证取得了较好的应用效果.%Remote sensing technology applying in the investigation of geological hazards is powerful timeless and economic and convenient.So RS has become an important means of geological hazard survey.To ascertain the development characteristics and distribution rule of geological hazards in Datong county, Qinghai province.The research built a three-dimensional visual platform of remote sensing interpretation based on GF-1, LANDSAT8 OLI and DEM data.And then conducted a comprehensive geological hazard survey focusing on landslide and debris flow for Datong county.The remote sensing characteristics and distribution characteristics of geological hazard body were described in detail.399 spot geological hazards were interpreted which including 6 spot collapse, 100 spot landslides, 54 spot ancient landslide, 87 spot debris flow, 140 spot unstable slope and 12 spot dangerous scarp steep cliff.Better results were obtained through the application of field verification.