Laser scanner and multibeam integrated survey for the assessment of rocky sea cliff geomorphological hazard

Within land management of coastal zone, considering both emerged and submerged areas, a large amount of high resolution georeferenced spatial data is required. Remote sensing techniques fully satisfy these needs and allow to obtain all information in a single survey campaign. An integrated survey of laser scanner and multibeam techniques has been experienced along the rocky cliffs of the Gallinara Island (Western Liguria, Italy), in order to produce a geomorphological map addressed to hazard evaluation. The resulting data allowed obtaining significative geo-structural and morphological information to evaluate the quality of the sea cliffs and the definition of their susceptibility to instability.