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Geophysical surveys to study a landslide body (north-eastern Sicily)

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Abstract

Almost the entire Italian territory is prone to hydrogeological risk mostly due to landslides and flooding. The high frequency of extreme weather events in areas prone to geological–hydraulic hazards contributes significantly to increasing the risk for cities and its infrastructure, but above all for the people living there. Therefore, it is vital to research into rapid monitoring techniques to be applied following a disaster such as a landslide, so that important background information, useful for planning interventions aimed at hazard mitigation, can be obtained. This work seeks to identify the depth of the sliding surface of a landslide affecting the municipal area of Tripi (village in the Messina province, Sicily), through two geophysical field surveys (MASW and HVSR) undertaken in the same area at an interval of about 5 years. The MASW surveys have enabled to reconstruct the distribution of shear wave velocity with depth. The HVSR surveys have provided information on resonant frequency and directional effects. The data integration obtained by the two methods allowed to reconstruct impedance contrast sections indicating the depth of the sliding surface of the landslide.

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Acknowledgments

This paper was carried out with the financial support of the University of Catania (PRA No. 20104001082, Scientific Supervisor: S. Imposa).

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Authors and Affiliations

  1. Department of Biological, Geological and Environmental Sciences, Earth Science Section, University of Catania, Corso Italia, 57, 95129, Catania, Italy

    S. Imposa & S. Grassi

  2. Geodixi, Via Alfonzetti, 46, 95100, Catania, Italy

    F. Fazio

  3. Catania, Italy

    G. Rannisi

  4. Messina, Italy

    P. Cino

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  1. S. Imposa
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  2. S. Grassi
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  3. F. Fazio
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  4. G. Rannisi
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  5. P. Cino
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Correspondence to S. Imposa.

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Imposa, S., Grassi, S., Fazio, F. et al. Geophysical surveys to study a landslide body (north-eastern Sicily). Nat Hazards 86 (Suppl 2), 327–343 (2017). https://doi.org/10.1007/s11069-016-2544-1

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  • DOI: https://doi.org/10.1007/s11069-016-2544-1

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