Acta Geodynamica et Geomaterialia

Title: CURRENT STABILITY MODELLING OF AN INCIPIENT SAN ANDRES GIANT LANDSLIDE ON EL HIERRO ISLAND, CANARIES, SPAIN _ FIRST ATTEMPT USING LIMITED INPUT DATA
Authors: Blahut Jan, Olejár Filip, Rott Josef and Petružálek Matěj
DOI: 10.13168/AGG.2020.0006
Journal: Acta Geodynamica et Geomaterialia, Vol. 17, No. 1 (197), Prague 2020
Full Text: PDF file (7.6 MB)
Keywords: Stability modelling, Limit Equilibrium Analysis, San Andrés Landslide, El Hierro, Seismic loading, Sea level change
Abstract: This paper presents first results from stability modelling of a deep-seated San Andrés Landslide located on the El Hierro Island, Canaries. It combines information from with information from own surficial field surveys, geotechnical testing, literature and analogies from other parts of the island and Canary Islands in general. Despite using limited data a slope profile for modelling has been defined and several models have been calculated. These include variations in the rock properties, influence of seismic loading and differences in sea level. This first attempt shows that San Andrés Landslide is currently stable however; it might be reactivated as a result of an earthquake with minimum VII intensity. Even in seismically calm periods a creep might be induced by the unconsolidated sea sediments located at the toe of the landslide. However, more detailed information about the internal structure of the landslide and rock properties is needed for thorough conclusions.