a Dept of Civil, Environmental and Architectural Engineering, University of Padova , Italy
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Transcript of a Dept of Civil, Environmental and Architectural Engineering, University of Padova , Italy
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NATURAL VERSUS ANTHROPOGENIC SUBSIDENCE OF VENICE: INVESTIGATION OF THE PRESENT
OCCURRENCE BY PERSISTENT SCATTERER INTERFEROMETRY
P. Teatini a,b, L. Tosi b, T. Strozzi c
a Dept of Civil, Environmental and Architectural Engineering, University of Padova, Italy b Institute of Marine Sciences, National Research Council, Venice, Italyc Gamma Remote Sensing, Gumligen, Switzerland
Sinking coastal citiesPress conference, Monday, 28 April, 14:00
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INTRODUCTION
Location of the Venice Lagoon
VENICE
Contributions to the RLS (relative land subsidence) at Venice
Consequences of RLS at Venice
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PRESENT LAND SUBSICENCEOF VENICE
Average displacement rates (mm/yr) obtained by Persistent Scatterer Interferometry at Venice
ERS 1992-2002:0.8 0.7 mm/yr
ENV 2003-2010:1.0 0.7 mm/yr
TSX 2008:1.0 1.6 mm/yr
CSK 2008-2011:1.1 1.0 mm/yr
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Map representing an estimate of the present anthropogenic land movements at Venice (+ ; )
SPLITTING NATURAL ANDANTHOPOGENIC SUBSIDENCE
Long-term (1992-2010)displacements
Short-term (2008)displacements
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OBSERVED MOVEMENTS:WHICH THE CAUSES?
Architecture of the shallow subsoil of Venice along the alignment A–D1 : the heterogeneous nature
of the Venice subsoil
2 : the city growth over the century
Growth in area of Venice from 900 A.D. to present
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OBSERVED MOVEMENTS:WHICH THE CAUSES?
Average displacement rates (mm/yr) obtained by PSI at a
portion of the city NE of St. Mark’s Basilica where
restoration works were carried out in 2008
3 : restoration works (e.g., building restoration, canal dredging, etc.)
4 : waves induced by the intensive boat and ship traffic
Photos of the typical Venice traffic
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Thank you