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  • geology  (2)
  • CSR  (1)
  • Molecular Diversity Preservation International  (1)
  • American Institute of Physics
  • 2020-2024
  • 2015-2019  (2)
  • 1
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    Marcellina e Gissi, origine naturale e antropica dei sinkhole (2018)
    CSR
    Details
    Publication Date: 2018-03-12
    Description: The main goal of this work is to study the geological and structural setting of two different geological areas, Marcellina close to Rome in Latium and Gissi in Abruzzi, to identify the possible mechanism of the generation and evolution of these collapses. Close to Marcellina town, a sinkhole suddenly formed in Pozzo Grande area on 2OO1, sinkhole have been formed in Holocene lacustrine sediments. For this reason microgravity prospecting has been applied in Marcellina town in order to identify the sinkholes risk areas and any other geological conditions similar to those leading to the 2OO1 collapse. The underground geological features of Marcellina town shows some sinkholes risk areas due to the nature of the sediments and sometimes to the presence of anthropic cavities. Both microgravity and geoelectrical tomography data have been proposed to explain the causes of some future collapse: the results obtained by geoelectrical tomography, made it possible to establish the presence of a low resistivity (4O Ohm/m) that corresponds a negative anomaly zone by microgravity survey (due to the presence of a considerable thickness of clay and sand formation, and sediments with lower density and resistivity) and a high resistivity (3320 Ohm/m) corresponds a maximum gravity zone (due to low deep of calcareous bedrock in underground, with higher density and resistivity). A profile is irregular: in the south-east side of city hall, the presence of a high resistivity corresponds a minimum gravity zone, due to the effect of the cistern or natural or anthropic cavity origin. Recently many sinkholes have been formed in some peculiar areas of the Abruzzi, Gissi. A microgravity survey of the area was carried out in 2002 and defined the extend, cause and nature of subsidence. It showed the subsidence resulted from underground dissolution of evaporitic rocks which presents karstic processes and active faults; the presence of a great underground water flow with its physico-chemical properties, ascending liquids and gases, tectonic faults and anthropic causes that can develop fastest phenomena. The rapid dissolution of evaporitic rocks in subsurface conditions can result in caves and cavities that rapidly expand, become unstable and start to collapse. In Marcellina town where the bedrock is buried by thick alluvial successions there are a human geohazards associated with the lower density sediments. Abstraction from sediments aquifers can yield excessively hard water, accelerate removal and cause aggravated subsidence. In the Gissi area where evaporitic rocks occurs there are a natural or induced geohazards associated with the rock, but awareness of them is low.
    Description: Published
    Description: 487-500
    Description: 7A. Geofisica per il monitoraggio ambientale e geologia medica
    Keywords: Gissi ; Marcellina ; sinkhole ; gravity survey ; microgravity survey ; ERT ; natural cavity ; anthropogenic cavity ; alluvial successions ; evaporitic rocks ; geology ; geohazard
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: book chapter
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  • 2
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    Unknown
    InSAR Time Series Analysis of Natural and Anthropogenic Coastal Plain Subsidence: The Case of Sibari (Southern Italy) (2015)
    Molecular Diversity Preservation International
    Details
    Publication Date: 2017-04-04
    Description: We applied the Small Baseline Subset multi-temporal InSAR technique (SBAS) to two SAR datasets acquired from 2003 up to 2013 by Envisat (ESA, European Space Agency) and COSMO-SkyMed (ASI, Italian Space Agency) satellites to investigate spatial and temporal patterns of land subsidence in the Sibari Plain (Southern Italy). Subsidence processes (up to ~20 mm/yr) were investigated comparing geological, hydrogeological, and land use information with interferometric results. We suppose a correlation between subsidence and thickness of the Plio-Quaternary succession suggesting an active role of the isostatic compensation. Furthermore, the active back thrusting in the Corigliano Gulf could trigger a flexural subsidence mechanism even if fault activity and earthquakes do not seem play a role in the present subsidence. In this context, the compaction of Holocene deposits contributes to ground deformation. Despite the rapid urbanization of the area in the last 50 years, we do not consider the intensive groundwater pumping and related water table drop as the main triggering cause of subsidence phenomena, in disagreement with some previous publications. Our interpretation for the deformation fields related to natural and anthropogenic factors would be a comprehensive and exhaustive justification to the complexity of subsidence processes in the Sibari Plain.
    Description: PON (Operational National Plan) 2007–2013 from MIUR (Italian Research Ministry of Research) Project AMICUS (Study for the environmental protection and the mitigation of Anthropogenic Pollution In the Coastal Environment of selected areas of Calabria; ID: PON01_ 02818) - COSMO-SkyMed® PRODUCTS, © ASI (Italian Space Agency)—provided under license of ASI in the framework of the S3 Project “Short term earthquake prediction and preparation” (DPC-INGV, 2013). The Envisat images are provided by ESA (European Space Agency) under the CAT.1P 5605
    Description: Published
    Description: 16004–16023
    Description: 6A. Monitoraggio ambientale, sicurezza e territorio
    Description: 1IT. Reti di monitoraggio e Osservazioni
    Description: JCR Journal
    Description: restricted
    Keywords: SBAS-InSAR ; Sibari Plain ; subsidence ; geology ; anthropic processes ; 04. Solid Earth::04.03. Geodesy::04.03.07. Satellite geodesy
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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