基于陆探一号SAR卫星的北盘江光照水电站滑坡隐患识别  

Identification of landslide hazards of Beipanjiang Guangzhao hydropower station based on Lutan-1 SAR satellite

作　　者：徐青松 胡君 崔文刚[1] 刘绥华[1] 胡丹 宁飞 李蔓[1] XU Qingsong;HU Jun;CUI Wengang;LIU Suihua;HU Dan;NING Fei;LI Man(School of Geography and Environmental Sciences,Guizhou Normal University,Guiyang 550025,China;Guizhou Water Conservancy and Hydropower Survey,Design and Research Institute Co.,Ltd.,Guiyang 550002,China)

机构地区：[1]贵州师范大学地理与环境科学学院,贵州贵阳550025 [2]贵州省水利水电勘测设计研究院有限公司,贵州贵阳550002

出　　处：《测绘通报》2025年第3期71-75,132,共6页Bulletin of Surveying and Mapping

基　　金：国家自然科学基金(42161029);贵州省科技重大计划项目(黔科合重大专项[2022]001)。

摘　　要：陆探一号(LT-1)SAR卫星是我国首颗L波段全极化民用干涉SAR卫星星座,由两颗参数相同的SAR卫星组成,跟飞模式下重访周期可达4 d,具有高分辨率、重访周期短、全极化成像等优点,有利于复杂地区滑坡隐患识别。本文以北盘江光照水电站为研究区域,获取了13景2023年4月2日至2023年6月21日LT-1升轨SAR数据,利用合成孔径雷达差分干涉测量技术(D-InSAR)开展滑坡隐患识别,并结合光学遥感影像验证识别结果的可靠性。结果显示,北盘江光照水电站共存在6处滑坡隐患区域,主要分布在库区北-东方向,通过综合降水量和光学遥感影像,详细分析了两处典型隐患区域的时空演化特征,发现降水是影响坡体稳定性的因素之一,证明了LT-1卫星在滑坡隐患识别中的可行性与有效性,为地质灾害防治行业提供了新的数据源。Lutan-1(LT-1)SAR satellite is China's first L-band fully polarimetric civil interferometric SAR satellite constellation.It is composed of two SAR satellites with the same parameters,and the revisit period can reach 4 days in the follow-up mode,which has the advantages of high resolution,short revisit period and full polarization imaging.It is conducive to the identification of landslide hazards in complex areas.In this paper,13 scenes of LT-1 ascending SAR data from April 2,2023 to June 21,2023 are obtained,and the differential interferometry synthetic aperture radar(D-InSAR)is used to identify landslide hazards,and the reliability of the identification results is verified by combining optical remote sensing images.The results show that there are 6 landslide hazard areas in Beipanjiang Guangzhao hydropower station,which are mainly distributed in the north-east direction of the reservoir area,and the spatio-temporal evolution characteristics of the two typical hazard areas are analyzed in detail through comprehensive rainfall and optical remote sensing images,and it is found that rainfall is one of the factors affecting slope stability,which proves the feasibility and effectiveness of LT-1 satellite in landslide hazard identification,and provides a new data source for the geological disaster prevention and control industry.

关 键 词：陆探一号 D-INSAR 北盘江光照水电站 滑坡 降水 

分 类 号：P237[天文地球—摄影测量与遥感]