The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences
Publications Copernicus
Articles | Volume XLI-B7
Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XLI-B7, 23–28, 2016
Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XLI-B7, 23–28, 2016

  17 Jun 2016

17 Jun 2016


G. Artese1, S. Fiaschi2, D. Di Martire3, S. Tessitore3, M. Fabris4, V. Achilli4, A. Ahmed3, S. Borgstrom5, D. Calcaterra3, M. Ramondini6, S. Artese7, M. Floris2, A. Menin4, M. Monego4, and V. Siniscalchi5 G. Artese et al.
  • 1Civil Engineering Dept., University of Calabria, Rende, Italy
  • 2Dept. of Geosciences, University of Padua, Padua, Italy
  • 3Dept. of Earth, Environment and Resources Sciences, Federico II University of Naples, Naples, Italy
  • 4Dept. of Civil, Environmental and Architectural Engineering, University of Padua, Padua, Italy
  • 5INGV, Osservatorio Vesuviano, Naples, Italy
  • 6Dept. of Civil, Architectural and Environmental Engineering, Federico II University of Naples, Naples, Italy
  • 7Dept. of Informatic, Modeling, Electronic and System Engineering, University of Calabria, Rende, Italy

Keywords: Ravenna, Land Subsidence, GPS, DInSAR, Staring Spotlight, Sentinel-1

Abstract. The Emilia Romagna Region (N-E Italy) and in particular the Adriatic Sea coastline of Ravenna, is affected by a noticeable subsidence that started in the 1950s, when the exploitation of on and off-shore methane reservoirs began, along with the pumping of groundwater for industrial uses. In such area the current subsidence rate, even if lower than in the past, reaches the -2 cm/y. Over the years, local Authorities have monitored this phenomenon with different techniques: spirit levelling, GPS surveys and, more recently, Differential Interferometric Synthetic Aperture Radar (DInSAR) techniques, confirming the critical situation of land subsidence risk. In this work, we present the comparison between the results obtained with DInSAR and GPS techniques applied to the study of the land subsidence in the Ravenna territory. With regard to the DInSAR, the Small Baseline Subset (SBAS) and the Coherent Pixel Technique (CPT) techniques have been used. Different SAR datasets have been exploited: ERS-1/2, ENVISAT, TerraSAR-X and Sentinel-1. Some GPS campaigns have been also carried out in a subsidence prone area. 3D vertices have been selected very close to existing persistent scatterers in order to link the GPS measurement results to the SAR ones. GPS data were processed into the International reference system and the comparisons between the coordinates, for the first 6 months of the monitoring, provided results with the same trend of the DInSAR data, even if inside the precision of the method.