摘要
针对美国俄勒冈州西海岸Hooskanaden滑坡发生的大规模失稳以及破坏后坡体的稳定性仍然未知的问题,本文基于升降轨Sentinel-1影像数据,利用SBAS-InSAR技术对Hooskanaden滑坡灾前的变形模式、驱动因素和灾后的稳定状态进行了研究。结果表明,早在2019年滑坡事件发生前,Hooskanaden滑坡就处于持续蠕变状态,其沿LOS向的最大形变速率可达-226 mm/a;该滑坡属于推移式滑坡,以水平自东向西运动为主,二维形变与其倾角的组合有利于推断滑坡的变形模式;滑坡运动存在明显的季节性周期变化,降雨是其加速变形的主要驱动因素;滑坡的中部及其后缘在灾后仍处于活跃状态,沿LOS向的最大形变速率达-65 mm/a,存在再次失稳的可能性。
According to the large-scale instability occurred in the Hooskanaden landslide on the west coast of Oregon,USA,and the stability of the slope after failure is still unknown,this paper uses SBAS-InSAR technology to analyze the pre-disaster deformation mode,driving factors and post-disaster stable state of the Hooskanaden landslide based on the ascending and descending Sentinel-1 images.The results show that the Hooskanaden landslide was in a state of continuous creep before the event in 2019,and its maximum deformation rate along the LOS direction could reach-226 mm/a;The Hooskanaden landslide is a progressive landslide,mainly moving horizontally from east to west,and the combination of two-dimensional deformation and dip angle is beneficial to infer the deformation mode of the landslide;The landslide movement has obvious seasonal cycle changes,and rainfall is the main driving factor for its accelerated deformation;The middle part and trailing edge of the Hooskanaden landslide are still active after the failure,with a maximum deformation rate along the LOS direction reaches-65 mm/a,and there is a possibility of failure again.
作者
邓斐
张双成
樊茜佑
牛玉芬
惠文华
司锦钊
吴文辉
DENG Fei;ZHANG Shuangcheng;FAN Qianyou;NIU Yufen;HUI Wenhua;SI Jinzhao;WU Wenhui(School of Geological Engineering and Geomatics,Chang'an University,Xi’an 710054,China;Observation and Research Station of Ground Fissure and Land Subsidence,Ministry of Natural Resources,Xi’an 710054,China;Key Laboratory of Western China's Mineral Resources and Geological Engineering,Ministry of Education,Xi’an 710054,China;School of Mining and Geomatics Engineering,Hebei University of Engineering,Handan,Hebei 056038,China)
出处
《测绘科学》
CSCD
北大核心
2024年第1期67-78,共12页
Science of Surveying and Mapping
基金
国家自然科学基金项目(42074041,42127802)
自然资源部陕西西安地裂缝与地面沉降野外科学观测研究站开放课题项目(2022-04)
作者简介
邓斐(1998—),女,山东人,硕士研究生,主要研究方向为InSAR技术用于地表形变监测。E-mail:dengfei981114@163.com;通信作者:张双成,教授,E-mail:shuangcheng369@chd.edu.cn
