Prof. Hakan A. Nefeslioglu Profile

Prof. Hakan A. Nefeslioglu

at Eskisehir Technical Univ

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Proceedings Article | 26 October 2022 Paper

Landslide detection using InSAR time series in the Kalekoy dam reservoir: Bingol, Türkiye

Beste Tavus, Sultan Kocaman, Hakan Nefeslioglu

Proceedings Volume 12267, 122670U (2022) https://doi.org/10.1117/12.2638608

KEYWORDS: Landslide (networking), Interferometric synthetic aperture radar, Synthetic aperture radar, Interferometry, Data acquisition, Time series analysis, Spatial resolution, Scattering, Vegetation, Sensors

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The detection and monitoring of landslides in dam reservoirs are essential for the maintenance and sustainable use of the infrastructure. Sentinel-1 datasets, freely available from European Space Agency (ESA), and Synthetic Aperture Radar Interferometry (InSAR) processing methods provide multitemporal surface change information in terms of deformation and enable engineering geological analyses. The main purpose of this study is to investigate the deformations within the large landslides based on InSAR measurements in the reservoir of the Kalekoy dam, which was built in Bingol Province in the Eastern part of Türkiye and filled in 2018. The region is prone to landslides at various magnitudes. For this purpose, the Looking into Continents from Space with Synthetic Aperture Radar (LiCSAR) products were used to apply the Small-Baseline Subsets (SBAS) method for the deformation extraction from Sentinel-1 time series datasets. The activities within the landslides and their surroundings were detected from the deformation maps produced for three periods between December 2015- December 2017 (pre-dam), December 2018-January 2020 (post-dam) and within 2018 (December 2017 - December 2018). Based on the time series analysis results, it was observed that the slope movements increased significantly in 2018, the time of the filling of the reservoir, and in the post-dam periods; and their patterns have also altered.

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