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  • Shanghai Scientific & Technical Publishers  (2)
  • CORILA, Venezia; Stampa “Multigraf” Spinea (ITA)  (1)
Document type
Years
  • 1
    Publication Date: 2017-04-04
    Description: In the Interferometric Point Target Analysis (IPTA) point-like targets that remain phase coherent over time are identified in a sequence of satellite Synthetic Aperture Radar (SAR) images and used to estimate the progressive deformation ofthe terrain with millimetric accuracy. Building upon conventional interferometric SAR techniques, IPT A overcomes atrnospheric delay anomalies and tempora! and geometrie decorrelation by exploring the tempora! and spatial characteristics of radar interferometric signatures collected from point targets widely available over urban areas but that can be also found scattered outside cities and villages. In this contribution the application of IPT A to the monitoring of land' subsidence in the urban and littoral environments of the Venice Lagoon is described. The results achieved using ali the available ERS SAR images acquired between 1992 and 2000 are very significant due to the achieved target spatial and tempora! coverage.
    Description: Published
    Description: 417-425
    Description: 5IT. Osservazioni satellitari
    Description: open
    Keywords: Land subsidence monitoring ; SAR Interferometry ; Point Target ; Lagoon environment ; Venice ; Point Target Analysis (IPTA) ; 04. Solid Earth::04.07. Tectonophysics::04.07.99. General or miscellaneous
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: book chapter
    Location Call Number Limitation Availability
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  • 2
    Publication Date: 2017-04-04
    Description: Our knowledge of the dynamics of vertical ground movements plays a fundamental role in the study of the geomorphological processes, particularly for determining sediment deposition and erosion causes. The conservation of lagoon morphological structures such as salt marshes and tidal flats, besides erosion due to waves and currents, depends on their surface height with respect to the sea level that, for short periods, is primarily related to the land subsidence process and secondarily to eustasy. Ground vertical variations with respect to the sea level, even if small, can, in fact, trigger sediment erosion and deposition processes. To determine land displacement rates in small islands of the Venice Lagoon not covered by traditional surveys (levelling and differential GPS), SAR-based monitoring techniques, i.e. differential SAR interferometry (INSAR) and interferometric point target analysis (IPTA) from ERS-1 and ERS-2 satellites, were performed. We will use the Murano Island for our example in this contribution.
    Description: Published
    Description: 157-160
    Description: 6A. Monitoraggio ambientale, sicurezza e territorio
    Description: open
    Keywords: Synthetic Aperture Radar (SAR) interferometry ; Land subsidence ; Venice Lagoon ; Murano Island ; Interferometric Point Target Analysis (IPTA) ; 05. General::05.08. Risk::05.08.99. General or miscellaneous
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: book chapter
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  • 3
    Publication Date: 2017-04-04
    Description: Anthropogenic land subsidence has widely been affecting the Veneto Region, northern Italy, since the past century. Groundwater withdrawals for industriai, domestic, and agri cultura! uses, exploitation of minerai water, thermal water for health treatment, methane-bearing water, and peat oxidation in reclaimed farmlands produced a land settlement varying in time and space throughout the area. Moreover, natural consolidation of the Quaternary deposits and tectonics of the pre-Quaternary basement contribute to increase ground surface lowering. Different survey techniques, with different characteristics; have been adopted to contro! land subsidence. To overcome the limits that characterize each single method and to enlarge the knowledge on regional land subsidence, an integrated monitoring method has been designed to accurately and reliably keep land movements under contro! in the study area. We combine five earth observation techniques, i.e. spirit leveling, Continuous Global Positioning System (CGPS), Differential GPS (DGPS), Interferometric Synthetic Aperture Radar (InSAR), and Interferometric Point Target Analysis (IPTA), together over about the last ten-years, and homogenized and integrated their results in both the time and space domains. The application of this Subsidence Integrated Monitoring System (SIMS) provides a new complete and dependable picture ofthe vertical displacements in the Veneto Region never available before.
    Description: Published
    Description: vol. I, pag. 435-444
    Description: 1IT. Reti di monitoraggio e Osservazioni
    Description: open
    Keywords: monitoring ; leveling ; GPS ; remote sensing ; data integration ; Veneto Region (Italy) ; 05. General::05.08. Risk::05.08.02. Hydrogeological risk
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: book chapter
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