Geomorphic Hazard And Risk In Platani’s Basin: Landslide Risk Valuation
Free (open access)
V. Liguori & D. Mortellaro
Hydrogeological risk is a more and more widespread matter because of the growing increase of damage and victims that landslides and floods have been provoking in the world. The methodology used to identify the \“risk” and its components is one of the issues most studied in the literature. The methods adopted in Italy are mainly found on qualitative evaluations. Such methods make possible the mapping of the territory according to classes of hazard and relatively different risk. Nowadays, GIS technologies are used as the support for performing analyses of stability of the slopes based on probabilistic and statistic methods. These technologies are essentially achieved through the amount of data available and from the necessity to enjoy dynamically all information. A statistical analysis represents a quantitative and even more objective approach to value the landslide risk, as it provides a detailed synthesis of information on the landslides incidence. After an excursus of the methodologies adopted to determine the risk, a methodology is requested for the evaluation of the landslide risk in Platani’s basin. The final result is a risk map. The model is validated by comparing the risk map with the map of the landslides found and mapped, and verifying if the areas subject to landslides are located indeed in the zones where the landslide risk is very high. The risk map represents a useful tool, during the planning of the basin, for the realization of non structural interventions (normative and planners) as a defense against the hydrogeologic risk. Keywords: hazard, evaluation, prevention, mitigation, risk, landslide. 1 Introduction The methodology used to identify the hydrogeologic \“risk” and its components is one of the issues most studied by the literature. The actions of hydrogeologic
hazard, evaluation, prevention, mitigation, risk, landslide.