Science Service System

Summary of Proposal LAN1708

TitleDeformation Monitoring in Mega City Istanbul withTerrasar-X Using Interferometric SAR Time Series Analysis
Investigator Abdikan, Saygin - Bulent Ecevit University, Geomatics Engineering
Team Member
PhD Arıkan, Mahmut - Delft Technology of University , Geoscience and Remote Sensing
PhD ÷calan, Taylan - Yildiz Technical University, Geomatics Engineering
Assist. Prof. Dr. Balik Sanli , Fusun - Yildiz Technical University, Geomatics Engineering
Dr CalÚ, Fabiana - Istituto per il Rilevamento Elettromagnetico dell'Ambiente (IREA-CNR), N/A
SummaryThe goal of this project is to determinepotential deformation in the megacity of Istanbul, Turkey. In Istanbul provincewhich has the highest population in Turkey with its 5300 km2 ofsize, located at northwest of Turkey. This city suffered due to earthquakes andserious damages threaten human life and property. To investigate thesedeformations, we will use the Persistent Scatterer Interferometry (PSI) methodwith TerraSAR-X data for the period of 2008 and 2011. We aimed to investigatethe potential deformation phenomena over the Istanbul city. A deformation mapwill be produced and time series analysis will be used to monitor the evolutionof the deformation in time. The rate of surface subsidence will be evaluatedwith GPS velocities. As an application, this study will investigate thelocalized subsidence at urban and suburban environments. The results will bepresented and shared with local authorities for risk analysis and management.
Detailed reportPreviously, we presented our main outputs of the project in both national and international conferences. In the report we present our last product and finalize our project. In the project we focused on the potential surface deformation in mega-city Istanbul, Turkey. According to 2014 statistics it has approximately 14 million populations which is the highest population in Turkey. Istanbul is a vulnerable city which had suffered from many natural and handmade hazards such as landslide, flooding and earthquakes. Previous researches were studied on mostly monitoring earthquake at large spatial areas. However, there are also many deformation phenomena which were related to man induced and geological structure were occurred in Istanbul. Within this context, we aimed to analyze impact of urbanization and geological structure on spatially dense deformation. For this purpose, we processed high resolution TerraSAR-X data using advanced interferometric SAR technique to produce deformation velocity. We analyzed our InSAR results together with geological, leveling and urban development information. The results depict up-to-date information of surface deformation occurring in dense urbanized mega-city Istanbul. A deformation map was produced and some hotspots were selected for a detailed analysis. Time series were generated over these areas to show the spatial distribution of deformation in time. We have analyzed remotely sensed deformation measurements with geological and leveling data. We investigate the results in detail and the discussion provides relationship between surface deformation and human activities.It is important especially for the historical peninsula where old city is located. The region is also declared as World Heritage Site by UNESCO. The results show potential risk at this region and it provides an opportunity to city planners to discuss these phenomena for a better management. At global scale, advanced InSAR technique might contributes on sustainable management of highly populated cities such as Istanbul. The details of the research study could be found in the published journal article which is included in the final report.

Back to list of proposals

© DLR 2004-2016