Ground deformation detection of the greater area of Thessaloniki (Northern Greece) using radar interferometry techniques

Abstract

Abstract. In the present study SAR interferometric techniques (stacking of conventional interferograms and Permanent Scatterers), using images from satellites ERS-1 and 2, have been applied to the region of Thessaloniki (northern Greece). The period covered by the images is 1992-2000. Both techniques gave good quantitative and qualitative results. The interferometric products were used to study ground surface deformation phenomena that could be related to the local tectonic context, the exploitation of underground water and sediments compaction.

Multi-temporal mapping of land subsidence at basin scale exploiting Persistent Scatterer Interferometry: case study of Gioia Tauro plain (Italy)

“…Land subsidence is a gradual lowering or a sudden sinking of the Earth's surface occurring in several regions worldwide (Canuti et al, 2005;Galloway et al, 1998;Raucoules et al, 2008;Tomàs et al, 2005). In most of the cases, gentle subsidence, extending over large areas, develops slowly (even almost imperceptibly).…”

Geo-hazard Monitoring in Northern Greece Using InSAR techniques: the case Study of Thessaloniki

“…3 we present the velocities for the frame of ERS 1 and 2 (1992-2000) from the track 279 with a descending orbit. Previous researchers have studied the broader area of Thessaloniki or parts of it [3,4,5,6]. New areas are now added that are detected to be in a deforming regime.…”

“…Another potential factor of deformation in the area is overpumping. A combination of tectonics and overpumping is the most probable cause [4]. We would also add one more possible factor of the deformation that is the geothermal activity that acts in Lagadas.…”

“…Both of them are timeseries methods that detect the temporal evolution of surface deformation using Synthetic Aperture Radar imagery. Our study depicts new areas of interest, compared to previous work [3,4,5,6] and aims at detecting and distinguishing small -scale movements, tectonic movements and subsidence caused by overexploitation of the aquifers or ground settlement, in Northern Greece. At the same time the results contribute to the seamless monitoring of the region, which acts as a junction of the Balkans, especially important in the new Sentinel era where shorter revisit times provide systematic geodetic measurements over the area.…”

The COSMO-SkyMed Constellation Monitors the Costa Concordia Wreck

“…InSAR-based techniques were mainly applied, thanks to the availability of huge historical SAR image archives [8], to measure and monitor ground deformation phenomena that had already occurred. Geoscientists have widely exploited SAR-based information to resolve the spatial distribution and temporal evolution of displacements in areas affected by slow or very slow moving landslides (e.g., [9][10][11][12][13]) or by land subsidence (e.g., [14][15][16][17]). On the contrary, few examples exist of the use of satellite InSAR in real and quasi-real time.…”