青海高家湾地区地表变形特征分析与潜在滑坡识别

Analysis of Surface Deformation Characteristics and Identification of Potential Landslides in Gaojiawan Area,Qinghai Province

利用StaMPS PS-InSAR技术,使用覆盖青海省海东市乐都区高家湾村地区2015年6月至2018年4月的128轨道所有可用Sentinel-1A数据,对已知和潜在滑坡进行识别研究,并使用时序分析技术对所识别的PS点进行筛选分类,研究滑坡分布与演化过程。对该地区所探测主滑坡在雷达视线方向最大年均形变量达到-9 mm/a,主滑坡体在2016年发生较大幅度滑动后,呈现趋稳态势;经实地勘调,初步给出了滑坡成因分析。

In this paper,we use the Sta MPS PS-InSAR technique and all available Sentinel-1 A data covering the Gaojiawan Village area,Ledu District,Haidong City,Qinghai Province,from June 2015 to April 2008,to identify and study those known and potential landslides. Time series analysis technique is used to filter and classify the identified PS points to study the distribution and evolution of landslide. The maximum annual deformation of the main landslide detected in this research area reaches-9 mm/a along the line of sigh.The main landslide body shows a stable trend after a relatively large slip in 2016. We also give a preliminary analysis of the cause after a geological survey.