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

Research areas:
Year:
2008
Authors:
  • D. Raucoules
  • I. Parcharidis
  • D. Feurer
  • F. Novalli
  • A. Ferretti
  • C. Carnec
  • E. Lagios
  • V. Sakkas
  • Stéphane Le Mouélic
  • G. Cooksley
  • S. Hosford
Journal:
NATURAL HAZARDS AND EARTH SYSTEM SCIENCES
Volume:
8
Number:
4
Pages:
779-788
ISSN:
1561-8633
BibTex:
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.
The city of Thessaloniki shows relatively stable ground conditions.
Subsidence in four locations, mainly in the area surrounding the city of
Thessaloniki, has been detected and assessed. Two of the sites
(Sindos-Kalochori and Langadhas) were already known from previous
studies as subsiding areas, using ground base measurements. On the
contrary the other two sites in the northern suburbs of Thessaloniki
(Oreokastro) and in the south-east (airport area) were unknown as areas
of subsidence. A further investigation based on fieldwork is needed in
these two areas. Finally, an attempt to interpret the observed
deformation, according to the geological regime of the area and its
anthropogenic activities, has been carried out.