Deformation of the Baige Landslide, Tibet, China, Revealed Through the Integration of Cross‐Platform ALOS/PALSAR‐1 and ALOS/PALSAR‐2 SAR Observations. Issue 3 (7th February 2020)

• Record Type: Journal Article
• Authors: Liu, Xiaojie; Zhao, Chaoying; Zhang, Qin; Lu, Zhong; Li, Zhenhong
• Is Part Of: Geophysical research letters. Volume 47:Issue 3(2020)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2020-02-07
• Subjects: Baige landslide -- offset tracking -- deformation monitoring; Geophysics -- Periodicals; Planets -- Periodicals; Lunar geology -- Periodicals; 550
• DOI: 10.1029/2019GL086142
• Languages: English
• ISSNs: 0094-8276

Abstract

Abstract: Twenty‐eight ALOS/PALSAR‐1 and ALOS/PALSAR‐2 images acquired from January 2007 to August 2018 were exploited to characterize the deformation history and temporal evolution of the Baige landslide, China, which successively occurred on 11 October and 3 November 2018. To mitigate the errors caused by the topographic relief and to conduct offset estimates between the SAR images from different platforms, a novel offset‐tracking method is proposed. The SAR images were ortho‐rectified firstly. Then two‐dimensional deformations were retrieved successfully from SAR images acquired at an identical platform and different platforms. Our results indicate that the maximum cumulative deformation in the line‐of‐sight direction of the Baige landslide reached about −60 m between January 2007 and August 2018. Furthermore, correlation between time series deformation and monthly precipitation and soil moisture derived from SAR intensity images suggests that the failure of the Baige landslide was closely related to the heavy rainfall in the summer of 2018. Key Points: An improved time series SAR offset‐tracking chain is proposed to extract the long‐term and large gradient landslide motion For the first time accurate pixel offsets between cross‐platform SAR data sets are achieved The cumulative deformation of <−60 m and temporal evolution over 11 years are successfully retrieved at the Baige landslide