Improvement in knowledge of the risk of land movement, Bonifacio (Corsica)

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Ineris is participating in a study, with the French Geological Survey (BRGM) and Cerema, to improve knowledge of the risk of land movement, or the “large-scale crumbling”, of the cliff beneath the Bonifacio citadel.

This work is being carried out as part of a research agreement with the French Departmental Directorate for Land and Sea (DDTM) and under the supervision of the General Directorate for Risk Prevention (DGPR).
The Bonifacio Citadel receives more than a million visitors every year and is characterised by a dense, ancient structure that stands directly above a highly eroded cliff base, overhanging by about 20 metres. Studies of the risks, carried out until now by Cerema, have highlighted the need for geotechnical instrumentation to be used alongside complementary investigations that should be carried out over an 18-month period.
In addition to its expertise on the stability of rock faces, the Institute’s contribution focuses on its competence in digital modelling and its methods of observing and monitoring geotechnical risks. In particular, the e.cenaris web monitoring platform, for monitoring geological and geotechnical risks, and long-range terrestrial LiDAR, can be used for precise observation of the cliff and management of the data collected.
This study programme, coordinated by the BRGM, is taking place in consultation with government departments, local authorities and a committee of experts.