Dynamics of a Giant Slow Landslide Along the Coast of the Aral Sea (Central Asia)
- Resource Type
- Conference
- Authors
- Aslan, Gokhan; De Michele, Marcello; Raucoules, Daniel; Renard, Francois; Cakir, Ziyadin
- Source
- 2021 IEEE International Geoscience and Remote Sensing Symposium IGARSS Geoscience and Remote Sensing Symposium IGARSS , 2021 IEEE International. :8384-8387 Jul, 2021
- Subject
- Aerospace
Geoscience
Photonics and Electrooptics
Signal Processing and Analysis
Shafts
Strips
Asia
Time series analysis
Geoscience and remote sensing
Rocks
Terrain factors
Aral Sea
Ustyurt Plateau
Lateral Rock Spreading
InSAR
Landslide
- Language
- ISSN
- 2153-7003
This paper presents the dynamics of the world's largest lateral mega-spreading landslide cluster along the western shoreline of the Aral Sea in Uzbekistan (Central Asia) using Interferometric Synthetic Aperture Radar (InSAR) time series analysis of three Sentinel-1 IW datasets over the period 2015–2020. It extends >50km wide and corresponds to a gravity-induced lateral spreading movement of relatively intact Sarmatian limestone blocks that are sliding over a highly plastic clay layer at rates up to 40 mm/yr with a clear dominance of horizontal motion at a nearly constant velocity. Slow vertical motions (up to 5 mm/yr) are localized along narrow strips of terraces where rock spread is attributed to rotational subsidence.