Ground deformation monitoring over Venice Lagoon using combined DInSAR/PSI techniques
P. Kourkouli, U. Wegmuller, T. Strozzi, A. Wiesmann
Gamma Remote Sensing AG, Guemligen, Switzerland
P. Teatini
Dept. of Civil, Environmental and Architectural Engineering, University of Padova, Padova,
Italy
L. Tosi
Institute of Marine Sciences, CNR, Venezia, Italy
K. Tansei
Dept. of Geography, University of Leicester, Leicester, UK
ABSTRACT
Synthetic Aperture Radar Interferometric (InSAR) techniques are widely applied to detect
ground displacements caused by both natural and anthropogenic effects. Such techniques are a
powerful tool for monitoring the ground motion, however, they have limitations such as
temporal and geometrical decorrelation. Persistent Scatterer Interferometry (PSI), a pixel
based methodology, has been developed to overcome such constraints. Nevertheless, also with
PSI poor spatial coverage is observed in many case studies, especially over natural
environments. In this contribution, we propose a methodology using elements from InSAR
and PSI techniques in order to improve the spatial coverage with valid information over
natural landscapes. For testing the applicability of this methodology, we selected as a test area
the Venice Lagoon and specifically an area covered by saltwater marshes. The synergistic
approach shows a good potential to achieve a good spatial coverage over the study area.
