SAR time-series Research Papers - Academia.edu (original) (raw)

The industrial area of Oreokastro, NW of the
city of Thessaloniki, is monitored using radar interferometry
to determine the spatial evolution of the underlying
ground deformation trends. Previous studies, using SAR
data acquired between 1992 and 1999, have revealed
subsidence; however, the driving mechanism has not been,
so far, solidly explained. Here, SAR satellite data from
ERS 1, 2 and ENVISAT missions, acquired between 1992
and 2010, are analysed to enhance our understanding of the
ground displacement trends and provide a thorough interpretation
of the phenomena. The analysis confirms a subsiding
displacement pattern from 1992 to 1999, whereas
the recent data indicate that after 2003 the motion direction
has changed to uplift. This whole monitoring of subsidence
and the subsequent uplift is a rarely documented phenomenon,
and in the case of Oreokastro is not reflecting a
natural process; on the contrary, the driver is anthropogenic,
related to the regional aquifer activity. Our study
also highlights the fact that the local faults act as
groundwater barriers and captures the existence of a possible
previously unknown tectonic structure.

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- Faults, Hazard Monitoring, SAR time-series, Natural surface rebound