Abstract
The Monte Gallo area is a carbonate relief that develops a significant nature reserve and highly attracts tourism to the urbanized area of the City of Palermo (Southern Italy). The slopes are affected by several rockfall events, which have also caused death, injuries, material damage, and a strong social and economic impact. Here, a detailed geological and geotechnical study to assess the rockfall hazard relating to two sectors of the mount has been carried out. The hazard assessment at the slope scale was performed based on geological, geomorphological, geomechanical, and seismic analysis. Using both analytical and empirical methods and by means of different software, the reconstruction of the propagation areas for the eastern sector of the Mount was possible. Results were used to better understand the overall structure, characterize the rockfall source areas’ kinematics, and recognize the basic failure mechanisms. The obtained runout areas were compared with each other and with those of previous studies conducted in a neighboring area, as well as with the corresponding hazard area maps of the official cartography, which is being updated. It is expected to be supplemented with maps derived from empirical models.
Highlights
The coastal sector of central-northern Sicily ranging from Capo Zafferano to Capo San Vito is characterized by isolated carbonate reliefs that are fundamental for the territory from an economic, social, tourist, and naturalistic perspective
The peculiar lithological and structural setting, the climate conditions, and the seismicity of the area define the conditions for the triggering of rockfall phenomena which have caused considerable material damage and, in certain cases, the loss of human life as well
The sizes and type of rockfall differ depending on the structural setting and the morphological processes on the slopes; the extension of propagation areas of the rockfall is conditioned by various factors such as the block size, the outcropping lithology, and slope morphology
Summary
The coastal sector of central-northern Sicily ranging from Capo Zafferano to Capo San Vito is characterized by isolated carbonate reliefs that are fundamental for the territory from an economic, social, tourist, and naturalistic perspective. Using both analytical and empirical methods and by means of different software, the reconstruction of the propagation areas for the eastern sector of the Mount was possible.
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