摘要
以四川省凉山州木里县为例,基于欧洲空间局提供的Sentinel-1A升降轨SAR数据,定量分析SAR卫星地表监测的可视性及不同坡向坡体形变监测的敏感性,并选取区域内典型滑坡开展精细监测和体积反演研究。结合坡向约束条件,利用升降轨LOS向形变监测结果对区域内格石滑坡的三维形变场进行反演,结果表明,该滑坡以水平滑移为主,并沿坡向下滑动,最大水平位移速率超100 mm/a,而垂直向及南北向最大年形变速率在40~60 mm/a,且南北向与垂直向形变特征与滑坡表面的局部地形有关。基于矢量倾斜法和质量守恒法对滑坡进行深度及体积反演发现,该滑坡最大深度区域位于滑坡中部,最大深度达52 m,滑坡体积在(2.2~2.8)×10^(7) m^(3)之间,两种方法反演的滑坡深度及体积结果具有较高的一致性。本文研究结果可为我国西南地区典型滑坡监测、防灾减灾及滑坡的影响范围估算提供技术参考。
Taking Muli county,Liangshan prefecture,Sichuan province as an example,based on the Sentinel-1A ascending and descending orbit SAR data provided by the European Space Agency,the visibility of SAR satellite surface monitoring and the sensitivity of slope deformation monitoring in different slope directions were quantitatively analyzed,and typical landslides in the region were selected to carry out fine monitoring and volume inversion research.Combined with the slope constraints,the three-dimensional deformation field of the lattice landslide in the area was inverted by using the LOS deformation results of the lifting rail.The results show that the landslide mainly moves horizontally and slides down the slope,with the maximum horizontal displacement rate exceeding 100 mm/a.The maximum annual deformation rate in the vertical and northward direction is between 40 and 60 mm/a,and the north-south and vertical deformation characteristics of the landslide are related to the local topography of the landslide surface.Based on the vector tilt method and the mass conservation method,the depth and volume of the landslide are inverted.The results show that the area with the greatest depth of the landslide is located in the middle of the slope,with a maximum depth of 52 meters,the volume of the landslide is between 2.2×10^(7) m^(3) and 2.8×10^(7) m^(3).And the results of the two methods have high consistency.This study provides a technical reference for the monitoring,disaster prevention and mitigation of typical landslides in southwest China,and the estimation of the impact range of landslides.
作者
周临轩
杨成生
李祖锋
刘泽伟
于仪
丁慧兰
ZHOU Linxuan;YANG Chengsheng;LI Zufeng;LIU Zewei;YU Yi;DING Huilan(School of Geological Engineering and Geomatics,Chang’an University,126 Yanta Road,Xi’an 710054,China;Key Laboratory of Western China’s Mineral Resources and Geological Engineering,Ministry of Education,126 Yanta Road,Xi’an 710054,China;Northwest Engineering Corporation Limited,Power China,18 East-Zhangba Road,Xi’an 710065,China)
出处
《大地测量与地球动力学》
北大核心
2025年第6期610-617,共8页
Journal of Geodesy and Geodynamics
基金
国家自然科学基金(42174032)
陕西省科技创新团队(2021TD-51)
陕西省地学大数据与地质灾害防治创新团队(2022)
陕西省教育厅服务地方专项计划(23JE001)
中央高校基本科研业务费专项(300102262206)。
关键词
Sentinel-1
滑坡隐患早期识别
滑坡三维形变
滑坡深度
滑坡体积
Sentinel-1
early identification of landslide hazards
landslide three-dimensional deformation
landslide depth
landslide volume
作者简介
第一作者:周临轩,硕士生,主要从事InSAR技术地质灾害应用研究,E-mail:1804390902@qq.com;通讯作者:杨成生,教授,博士生导师,主要研究方向为InSAR地质灾害监测理论与应用,E-mail:yangchengsheng@chd.edu.cn。
