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a Dept of Civil, Environmental and Architectural Engineering, University of Padova , Italy

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

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a Dept of Civil, Environmental and Architectural Engineering, University of Padova , Italy

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  1. 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 aDept of Civil, Environmental and Architectural Engineering, University of Padova, Italy b Institute of Marine Sciences, National Research Council, Venice, Italy c Gamma Remote Sensing, Gumligen, Switzerland Sinking coastal cities Press conference, Monday, 28 April, 14:00

  2. INTRODUCTION Contributions to the RLS (relative land subsidence) at Venice VENICE Location of the Venice Lagoon Consequences of RLS at Venice

  3. PRESENT LAND SUBSICENCE OF VENICE Average displacement rates (mm/yr) obtained by Persistent Scatterer Interferometry at Venice ENV 2003-2010: 1.0  0.7 mm/yr ERS 1992-2002: 0.8  0.7 mm/yr TSX 2008: 1.0  1.6 mm/yr CSK 2008-2011: 1.1  1.0 mm/yr

  4. SPLITTING NATURAL AND ANTHOPOGENIC SUBSIDENCE = Short-term (2008) displacements Long-term (1992-2010) displacements = Map representing an estimate of the present anthropogenic land movements at Venice (+ ; )

  5. OBSERVED MOVEMENTS: WHICH THE CAUSES? Architecture of the shallow subsoil of Venice along the alignment A–D 1 : 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

  6. OBSERVED MOVEMENTS: WHICH THE CAUSES? 3 : restoration works (e.g., building restoration, canal dredging, etc.) 4 : waves induced by the intensive boat and ship traffic 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 Photos of the typical Venice traffic

  7. Thankyou

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