Unit:
Κατεύθυνση Πρόληψη και Διαχείριση των Φυσικών ΚαταστροφώνLibrary of the School of Science
Supervisors info:
Επικ. Καθηγητής Παπανικολάου Ιωάννης, Επικ. Καθηγητής Βασιλάκης Εμμανουήλ, Ερευνητής ESA Φουμέλης Μιχάλης
Original Title:
Διερεύνηση κατολισθητικών φαινομένων με χρήση Συμβολομετρίας / Ραντάρ, στην περιοχή της Ηλείας
Translated title:
Investigating landslides using Interferometry / Radar, in the area of Ilia, Peloponnese
Summary:
The aim of the present thesis is the detection of landslides in the area of
Ilia, Peloponnese using differential interferometry. There were applied two
different techniques of Multi-Temporal Interferometry (MTI): the method of
Intereferogram Stacking and the technique of Small Baseline Subset (SBAS). The
main reason for selecting these techniques is the limitation of noise due to
atmospheric delay, while offering the advantage of high measurement accuracy.
To achieve the thesis goal, the on-line G-POD (Grid Processing On Demand)
platform of the European Space Agency was used. Twenty seven ENVISAT ASAR
images of ascending and thirty five of descending orbit were processed, with
time span from 2002 to 2010.
The output results consist mainly deformation maps of the SBAS technique, due
to the fact that the second technique (stacking) didn’t completed successfully.
It turned out that regions affected from the disastrous fire of 2007, shown
greater negative displacement with numerous lansliding phenomena. Furthermore,
a time-series analysis was conducted of several regions with negative
displacement, which shown that the shake of the 2008, Andravida earthquake
produced landslide near the epicenter.
Concluding, it was proven that Multi-Temporal Differential Interferomtry is a
useful tool for landslide detection, contributing to understanding the
mechanisms producing those phenomena. Despite the limitations of the method,
related to high vegetation cover of Ilia, combined with high relief, the
advantages are greater than the conventional methods.
Main subject category:
Natural disasters
Other subject categories:
Geomorphology
Databases and Information Systems
Cartogrpaphy
Keywords:
Differential Interferometry, Landslides, Ilia, Interferogram Stacking, Small Baseline Subset
Number of index pages:
5-9
