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ThinkMind // GEOProcessing 2023, The Fifteenth International Conference on Advanced Geographic Information Systems, Applications, and Services // View article geoprocessing_2023_1_10_38001
Application of InSAR Method to Estimate the Surface Deformation of the May Embankment Dam,Turkey
 Authors:
Rouhollah Nasirzadehdizaji
Anil Olgac Keywords: Interferometric SAR; monitoring; surface displacement; dam structure; climate change. Abstract:
This study is conducted to apply the Interferometric Synthetic Aperture Radar (InSAR) method to investigate the deformation of the upstream face of the May Embankment Dam located in central Anatolia, Turkey. Optical satellite imagery revealed significant water volume variation at the May Dam over the past decade, prompting investigation due to the high seismic risk of the region and the potential consequences of dam failure for downstream lives and properties. In this study, dam surface displacements were obtained from a series of Sentinel-1 processed Synthetic Aperture Radar (SAR) data through postprocessing and analysis of Single-Look Complex (SLC) radar image pairs (interferograms). The results show that the average displacement of the dam surface is -9.5 cm in the processed 7-year SAR data. However, a cumulative displacement rate of -22.16 cm is estimated in the dam's structure between 2015 and 2022. The highest changes occurred between 2018-2020, with a deformation of -13.37 cm, as the amount of water behind the dam began to increase due to increased precipitation. Analysis of meteorological data indicates that the climate conditions in the semi-arid upstream area that supplies water to the dam result in lower precipitation and reduced water flow for much of the year, often leaving the dam dry or with reduced water volume. However, due to the effects of climate change, heavy precipitation has occurred in the area, which led to large amounts of water collecting behind the dam. Consequently, if not enough attention is paid to the surface changes of the dam that are happening, which have been obtained through the radar satellite data analysis in this study, then during the intensive rainfalls that have already been recorded in the region, there is a potential and possibility of damage to the dam and causing a threat to the lives of the residents of several cities and damage to the agricultural fields on the downstream of the dam. Pages: 1 to 6 Copyright: Copyright (c) IARIA, 2023 Publication date: April 24, 2023 Published in: conference ISSN: 2308-393X ISBN: 978-1-68558-079-7 Location: Venice, Italy Dates: from April 24, 2023 to April 28, 2023
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