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Persistent Scatterer Interferometry in the post-event monitoring of the Idukki Landslides
Geocarto International ( IF 3.8 ) Pub Date : 2020-06-24 , DOI: 10.1080/10106049.2020.1778101
Jesudasan Jacinth Jennifer 1 , Subbarayan Saravanan 1 , Biswajeet Pradhan 2, 3
Affiliation  

Abstract

The monitoring of pre-failure movements and their evolution over time is necessary to assess the predisposing and triggering factors. This research focusses on assessing terrain displacements in the Idukki district (Kerala, India) over a year before the deadly disaster, which occurred in August 2018; this disaster was claimed to be a dreadful one as it took off hundreds of human lives and properties. The post-event Persistent Scatterers interferometric analysis on a stack of 20 Sentinel-1 images was performed to analyse the precursory deformations of the landslides. From the results obtained, the study region is estimated to have undergone a displacement of -26 to +19 mm/year, which indicates the instability of the terrain. Also it is evident that the occurrence of the landslides in August 2018, has been due to the effect of the torrential rainfall and the increase in the pore water inducing instability, thereby causing displacement in the region.



中文翻译:

持续散射干涉仪在 Idukki 滑坡事后监测中的应用

摘要

监测故障前的运动及其随时间的演变对于评估诱发因素和触发因素是必要的。这项研究的重点是在 2018 年 8 月发生的致命灾难发生前一年多评估 Idukki 区(印度喀拉拉邦)的地形位移;据称这场灾难是一场可怕的灾难,因为它夺走了数百人的生命和财产。对一组 20 张 Sentinel-1 图像进行了事件后持久散射干涉分析,以分析滑坡的前兆变形。根据所得结果,估计研究区域发生了-26至+19毫米/年的位移,这表明地形的不稳定性。同样明显的是,2018 年 8 月发生的山体滑坡,

更新日期:2020-06-24
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