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Open AccessArticle

Investigation of a Small Landslide in the Qinghai-Tibet Plateau by InSAR and Absolute Deformation Model

1
Cryosphere Research Station on the Qinghai-Tibet Plateau, State Key Laboratory of Cryospheric Sciences, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China
2
School of Civil Engineering, Lanzhou University of Technology, Lanzhou 730050, China
3
School of Geographical Sciences, Nanjing University of Information Science & Technology, Nanjing 210044, China
4
University of Chinese Academy of Sciences, Beijing 100049, China
*
Author to whom correspondence should be addressed.
Remote Sens. 2019, 11(18), 2126; https://doi.org/10.3390/rs11182126
Received: 31 July 2019 / Revised: 26 August 2019 / Accepted: 5 September 2019 / Published: 12 September 2019
(This article belongs to the Special Issue SAR for Natural Hazard )
Landslides are one of the major geohazards in the Qinghai-Tibet Plateau, and have recently increased in both frequency and size. SAR interferometry (InSAR) has been widely applied in landslide research, but studies on monitoring small-scale landslides are rare. In this study, we investigated the performance of Small Baseline Subsets method (SBAS) in monitoring small-scale landslide and further developed a new deformation model to obtain the absolute deformation time series. The results showed that SBAS could well capture the small-scale landslide characteristics including spatiotemporal abnormal displacement and progressive failure processes. The newly developed absolute deformation model further detected the process of landslide details, such as instances of noticeable creeps induced by rainfall and snowmelt. Finally, a conceptual model of the kinematics-based failure mechanism for small-scale landslide was proposed. This study extended the monitoring capability of InSAR and improved our knowledge on the deformation in the frozen ground regions. View Full-Text
Keywords: landslide; SAR interferometry (InSAR); Small Baseline Subsets (SBAS); absolute deformation; Qinghai-Tibet Plateau landslide; SAR interferometry (InSAR); Small Baseline Subsets (SBAS); absolute deformation; Qinghai-Tibet Plateau
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MDPI and ACS Style

Hao, J.; Wu, T.; Wu, X.; Hu, G.; Zou, D.; Zhu, X.; Zhao, L.; Li, R.; Xie, C.; Ni, J.; Yang, C.; Li, X.; Ma, W. Investigation of a Small Landslide in the Qinghai-Tibet Plateau by InSAR and Absolute Deformation Model. Remote Sens. 2019, 11, 2126.

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