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Application of a method to assess coastal hazard: the cliffs of the Sorrento Peninsula and Capri (southern Italy)

 

T. De Pippo, C. Donadio, M. Pennetta, F. Terlizzi & A. Valente

 

 

Rivista: The Geological Society of London (UK), Lyell Collection

volume: Special Publications 2009, 322

ISBN-10: N/A

ISBN-13: 978-1-86239-282-3

pagine: 189-204

DOI: 10.1144/SP322.9

 

Abstract

A systematic method to quantify, rank and map the distributionof hazards is applied to the coastal cliffs of the SorrentoPeninsula and Capri (Campania, southern Italy). For such cliffs,which have previously been characterized in terms of types andprocesses, and therefore compartmentalized, the predispositionto a particular hazard (or indicator), based on its nature,magnitude and recurrence, is evaluated by assigning a code:the higher the predisposition, the higher the code for eachcompartment. Moreover, hazards can influence one another, andthe number of such interactions indicates the seriousness ofeach hazard, to which a weighting is assigned. By comparingeach code in a specific compartment using an interaction matrix,which takes the weighting into consideration, we have calculateda resultant, which is the overall hazard for the compartment.This resultant can also be expressed cartographically. In thisapplication six primary hazards (parameters) are considered:cliff retreat, riverine flooding, storms, landslides, seismicityand volcanism, and man-made structures. The last is the mosthazardous parameter, which is weighted highly, owing to itsextensive influence on the other hazards. In contrast, riverineflooding and seismicity and volcanism are the least interactive.

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