Sea cliff slope stability analysis

Client: Geoservizi S.r.l., Vico del Gargano Municipality
Period: October 2010
Location: Vico del Gargano, Italy
Technologies: Terrestrial SAR Interferometry, Terrestrial Laser Scanner, Infra-Red Thermography

Issue

Evaluate the susceptibility to rock fall and topple of a not accessible vertical cliff in limestone material by a remote position.

Solution

An analytical approach based on the integration of results derived from terrestrial remote sensing techniques was developed for this purpose. Specifically, detailed 3D models of the slope were collected by the Terrestrial Laser Scanner, suitable for the geostructural evaluation of the rockmass. Mechanical behaviour of the mass was derived from Terrestrial Infrared multitemporal surveys and a few days Terrestrial InSAR campaign.

Achievement

The main joints pattern and main jointing features of the cliff were derived from the virtual analysis of the 3D points cloud. Displacement maps and time series of specific points of the cliff were collected thus allowing to identify the most released blocks more susceptible to collapse. Priority maps were derived, thus supporting local authorities in charge of land management to drive stabilisation design.