气候变化领域集成服务门户(CCPortal): Investigation of the landslides in Beylikdüzü-Esenyurt Districts of Istanbul from InSAR and GNSS observations

CCPortal

DOI	10.1007/s11069-021-04875-7
	Investigation of the landslides in Beylikdüzü-Esenyurt Districts of Istanbul from InSAR and GNSS observations
	Bayik C.; Abdikan S.; Ozdemir A.; Arıkan M.; Balik Sanli F.; Dogan U.
发表日期	2021
ISSN	0921030X
英文摘要	This study aims to detect recent landslide displacements caused by geological structure of the region where there is intense urbanization using advanced Interferometric Synthetic Aperture Radar (InSAR) techniques and with Global Navigation Satellite Systems (GNSS) observations in the Beylikdüzü and Esenyurt districts in Istanbul megacity, Turkey. In this study, multiple satellites with different frequencies (C-band, L-band) and periodic GNSS observations were employed. For the entire peninsula, we processed 149 images from the ascending orbit, 144 images from the descending orbit of Sentinel-1 (C-Band) and 24 ALOS-2 (L-band) images from the ascending orbit. The evaluations were carried out in the period between 2015 and 2020 for Sentinel-1 imagery and 2015–2020 for ALOS-2 imagery respectively. Since the study area is covered by dense settlements, the Persistent Scatterer InSAR (PSI) technique was utilized to determine the landslide behaviors. According to the results, for both orbits of the Sentinel-1, the horizontal displacement and the vertical displacement were observed in the range of − 10 to 6 mm. Compared to the magnitude of displacement signal measured by Sentinel-1, ALOS-2 data has higher values due to the high surface penetration of the L-band. The results showed that most of the old landslide regions are reactivated. Horizontal movement derived through Sentinel-1 showed that the highest movement overlaps with old landslides. L-band ALOS-2 provided better spatial coverage of landslide movement than C-band Sentinel-1 data, especially at the rural part along the coast of the lake. © 2021, The Author(s), under exclusive licence to Springer Nature B.V.
关键词	GNSS InSAR Landslides Multi-temporal SAR Time series
语种	英语
来源期刊	Natural Hazards
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/206106
作者单位	Department of Geomatic Engineering, Zonguldak Bulent Ecevit University, Zonguldak, 67100, Turkey; Department of Geomatic Engineering, Hacettepe University, Ankara, 06800, Turkey; Department of Geomatic Engineering, Yildiz Technical University, Istanbul, 34210, Turkey; BeeSense, Consultancy and Engineering on Geo-Information Technologies, Delft, Netherlands
推荐引用方式 GB/T 7714	Bayik C.,Abdikan S.,Ozdemir A.,et al. Investigation of the landslides in Beylikdüzü-Esenyurt Districts of Istanbul from InSAR and GNSS observations[J],2021.
APA	Bayik C.,Abdikan S.,Ozdemir A.,Arıkan M.,Balik Sanli F.,&Dogan U..(2021).Investigation of the landslides in Beylikdüzü-Esenyurt Districts of Istanbul from InSAR and GNSS observations.Natural Hazards.
MLA	Bayik C.,et al."Investigation of the landslides in Beylikdüzü-Esenyurt Districts of Istanbul from InSAR and GNSS observations".Natural Hazards (2021).