TRANSIENT REACTIVATION OF KARA-BOGAZ-GOL COASTAL LANDSLIDE, MODULATED BY HYDROLOGICAL FORCES CAPTURED USING INSAR (TURKMENISTAN)

Gökhan Aslan*, Marcello De Michele, Daniel Raucoules, Severine Bernardie, Ziyadin Çakir

*Corresponding author for this work

Research output: Contribution to conferencePaperpeer-review

Abstract

This paper presents a hydrologically modulated transient motion of world's largest active landslide occurring along the western shore of the Kara-Bogaz-Gol (KBG) lagoon of the Caspian Sea (CS) using Interferometric Synthetic Aperture Radar (InSAR) data. Here a dataset of Sentinel 1A/B IW SAR imagery acquired on ascending and descending modes between 2014 and 2020 has been processed to analyze the present-day evolution of this giant coastal landslide. The results shows that the eastern bank of the KBG lagoon (25x5 km) is horizontally sliding toward the lake at a rate of 25 mm/yr. The time series analysis reveals week-long accelerating slip events when the KBG reservoir water level reached its seasonal maximum. This study presents new information on the potential roles of the hydrological forces modulated by sea-level rises on the ancient landslides which originated during successive CS transgressions in the Late Glacial.

Original languageEnglish
Pages5239-5242
Number of pages4
DOIs
Publication statusPublished - 2021
Externally publishedYes
Event2021 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2021 - Brussels, Belgium
Duration: 12 Jul 202116 Jul 2021

Conference

Conference2021 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2021
Country/TerritoryBelgium
CityBrussels
Period12/07/2116/07/21

Bibliographical note

Publisher Copyright:
© 2021 IEEE

Keywords

  • Caspian Sea
  • InSAR
  • Kara-Bogaz-Gol
  • mega landslide
  • Turkmenistan

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