In this chapter, an object-oriented hierarchical approach for the study of landslides is proposed. The model has been applied on the instabilities that affected the northeastern slope of the Rocca di Sciara relief on the left slope of the Imera river valley in northern Sicily. The last reactivation of the lower portion of this slope dates to April 2015; the event caused severe damages to the road network, also involving the Palermo – Catania highway leading to the failure of the Imera viaduct. The hierarchical model of landslides has been built considering the spatiotemporal relations of all the inventoried landslides along the slope in order to reconstruct the event series; it includes four levels of detail: the focal level composed by the landslides themselves, one level of decomposition storing their components and two levels of generalization. The last generalization defines the Rocca di Sciara landslide system, which groups all the landslides spatially connected and their corresponding evolution phases. This methodological approach for studying nested and superimposed landslide events can be useful for the reconstruction of the landsliding history of a slope and its evolution both in spatial and in temporal terms.
A Hierarchical Model for the Rocca di Sciara Northeastern Slope Instabilities (Sicily, Italy)
Mario Valiante
;Francesca Bozzano;Domenico Guida
2020-01-01
Abstract
In this chapter, an object-oriented hierarchical approach for the study of landslides is proposed. The model has been applied on the instabilities that affected the northeastern slope of the Rocca di Sciara relief on the left slope of the Imera river valley in northern Sicily. The last reactivation of the lower portion of this slope dates to April 2015; the event caused severe damages to the road network, also involving the Palermo – Catania highway leading to the failure of the Imera viaduct. The hierarchical model of landslides has been built considering the spatiotemporal relations of all the inventoried landslides along the slope in order to reconstruct the event series; it includes four levels of detail: the focal level composed by the landslides themselves, one level of decomposition storing their components and two levels of generalization. The last generalization defines the Rocca di Sciara landslide system, which groups all the landslides spatially connected and their corresponding evolution phases. This methodological approach for studying nested and superimposed landslide events can be useful for the reconstruction of the landsliding history of a slope and its evolution both in spatial and in temporal terms.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
