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Rockfall hazard assessment along a road in the Sorrento Peninsula, Campania, southern Italy

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Abstract

Rockfalls are common in the steep and vertical slopes of the Campania carbonate massifs and ridges, and frequently represent the main threat to the anthropogenic environment, potentially damaging urban areas, scattered houses, roads, etc. Despite the generally limited volumes involved, the high velocity of movement (from few to tens of metres per second) poses rockfalls among the most dangerous natural hazards to man. Evaluating the rockfall hazard is not an easy task, due to the high number of involved factors, and particularly to the difficulty in determining the properties of the rock mass. In this paper, we illustrate the assessment of the rockfall hazard along a small area of the Sorrento Peninsula (Campania region, southern Italy). Choice of the site was determined by the presence of a road heavily frequented by vehicles. In the area, we have carried out detailed field surveys and software simulations that allow generating simple rockfall hazard maps. Over twenty measurement stations for geo-mechanical characterization of the rock mass have been distributed along a 400-m-long slope of Mount Vico Alvano. Following the internationally established standards for the acquisition of rock mass parameters, the main kinematics have been recognized, and the discontinuity families leading to the different failures identified. After carrying out field experiments by artificially releasing a number of unstable blocks on the rock cliff, the rockfall trajectories along the slope were modelled using 2-D and 3-D programs for rockfall analysis. The results were exploited to evaluate the rockfall hazard along the threatened element at risk.

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Authors and Affiliations

  1. Idrogeo s.r.l., Vico Equense, NA, Italy

    B. Palma

  2. CNR-IRPI, Bari, Italy

    M. Parise

  3. CNR-IRPI, Perugia, Italy

    P. Reichenbach & F. Guzzetti

Authors
  1. B. Palma
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  2. M. Parise
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  3. P. Reichenbach
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  4. F. Guzzetti
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Correspondence to M. Parise.

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Palma, B., Parise, M., Reichenbach, P. et al. Rockfall hazard assessment along a road in the Sorrento Peninsula, Campania, southern Italy. Nat Hazards 61, 187–201 (2012). https://doi.org/10.1007/s11069-011-9899-0

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  • DOI: https://doi.org/10.1007/s11069-011-9899-0

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