基于SBAS-InSAR技术的雅鲁藏布江色东普沟地质灾害发育特征与复活趋势分析  

Analysis on the Development Characteristics and Resurrection Trend of Geological Hazards in Sedongpu Gully of Yarlung Zangbo River based on SBAS-InSAR Technology

作　　者：杨成业[1] 张鑫 李若铭 薄雾 刘朵 YANG Chengye;ZHANG Xin;LI Ruoming;BO Wu;LIU Duo(College of Engineering,Tibet University,Lhasa 50000,China)

机构地区：[1]西藏大学工学院,西藏拉萨850000

出　　处：《高原科学研究》2024年第3期1-13,共13页Plateau Science Research

基　　金：国家自然科学基金联合基金项目(U22A20569),西藏大学人才培育项目(00061243/023/026).

摘　　要：随着全球气候不断变暖,青藏高原发生地质灾害的频率和危害强度大幅增加,对川藏铁路沿线的滑坡泥石流进行及时有效的监测和防治具有重要意义。文章选取了2016年7月至2020年1月之间的Senti⁃nel-1A数据,解译和分析了区域内地物发生的变化情况,采用SBAS-InSAR技术对雅鲁藏布江沿岸的色东普沟发生高位冰崩地质灾害链致灾过程和复活趋势进行了研究。结果表明:依据区域内时序相关性的变化情况推断出的灾害事件与SBAS-InSAR的灾害探测结果具有高度一致性,SBAS-InSAR对冰崩-岩崩-滑坡泥石流等灾害链进行监测是一种有效的手段;色东普沟自2018年致灾以来,新增5处变形体,累计形变量均已超过40 mm,存在复活迹象。随着气候变暖、降雨量增加、冰川消融,色东普沟在今后相当长的时期内仍会保持此类灾害事件的高发频发态势,应进一步加强该区域地灾监测,提前开展防治工作。With the continuous warming of the global climate,the frequency and intensity of geological disasters on the Qinghai-Tibet Plateau have increased significantly.Hence it is crucial to monitor and prevent landslides and debris flows along the Sichuan-Tibet Railway effectively.In this study,the Sentinel-1A data from July 2016 to January 2020 were used to interpret and analyze the changes in interior features in the Sedongpu Gorge region along the Yarlung Tsangpo River,and the disaster process and resurrection trend of the geological disaster chain of high-level ice avalanche in the area were studied using SBAS-InSAR technology.The results show that the disaster events inferred from temporal correlation in the region are highly consistent with the disaster detection results of SBAS-InSAR,implying that SBAS-InSAR is an effective method to monitor the disaster chain such as ice avalanche-rockfall-landslide-debris flow.The results also show that since the Sedongpu gully disaster in 2018,five new deformations have been generated,and their cumulative shape variable has exceeded 40mm,showing signs of resurrection.With climate warming,increased rainfall,and glacier melting,Sedongpu gully is likely to experience high and frequent occurrences of such disasters.Therefore,it is necessary to strengthen the monitoring of local disasters in this region and carry out proactive prevention and control measures in advance.

关 键 词：SBAS-InSAR 色东普沟 地质灾害 时序形变 复活趋势 

分 类 号：P237[天文地球—摄影测量与遥感]