Evaluating landslide hazard through geomorphologic, hydrologic and historical analyses in North-Eastern Calabria (Southern Italy)

An integrated analysis of geomorphologic, hydrologic and historical data has been carried out in the NE Calabrian sector named Alto Jonio (AJ). The principal hydrogeologic events (i.e. events of damage to urbanised sectors and roads, caused by floods or rainfall-triggered landslides), which occurred in AJ in the present century, have been recognised through historical data collection and analyses. Slope movements, either located in the surroundings of the villages or affecting the roads, have been mapped. The daily rainfall series, recorded at rain gauges located in the study area, have also been analysed. Comparing the results of the three “independent” phases of our study (geomorphologic, hydrologic and historical), different “types” of damaging event, characterised by distinct meteoric and geomorphic features (in terms of both spatial and temporal patterns), can be recognised. Recurrence intervals, as evaluated for the main triggering events, combined with typological classification of damaging events, can be helpful in defining scenarios and strategies for risk management.