Landslides inventory map of the roadway SS103 in Southern Apennines (Italy)

Abstract

Landslides represent one of the main processes affecting mountainous and hilly landscapes, and within the context of geological hazard, they can cause the damming of many paths and roads, hindering the movement of people and goods. Landslide inventory maps specifically created along roadways, serve as the fundamental knowledge tool for designing interventions. The paper deals with the mapping of landslides distribution along the roadway SS103 “Val d’Agri” which is a relevant thoroughfare crossing the Campania and Basilicata regions, in southern Italy. The mapping is realized in a 71 km long transect, considering a width of 2 km to allow for the complete mapping of landslide bodies intersecting with the road infrastructure. Field surveys and UAV images were used to map landslides, in a landslide inventory map at 1:5000 scale. Lithology and slope features were primarily considered to divide the transect into 15 homogeneous sectors. The investigation allowed us to detect more than 2300 landslides which were classified on movement types and state of activity. Results show that the largest number of landslides occurred in sandstone and clayey lithologies, both
in mountain and hill landscapes. This landslides inventory map represents the basic tool for further hazard investigation.