Stabilita vulkanických ostrovů ve vztahu ke vzniku obřích svahových deformací na příkladu ostrova El Hierro, Kanárské ostrovy

Olejár, Filip

Title: Stability of volcanic islands in relation to giant landslides on the example of El Hierro Island, Canary Islands Volcanic islands are known by common occurrence of volcano collapses usually connected with their early stage of formation. When this type of slope deformation occurs, large masses of material, often exceeding hundreds of thousands of cubic meters of rocks, are moving downslope. The development of this kind of movements is firmly linked with the period of volcanic islands growth. Nowadays, slope movements of such dimensions could have catastrophic consequences on inhabited islands. Additionally, in several cases there has been proved emergence of tsunami waves with far-reaching impacts because of these movements. Tsunami hazards have been one of the impulses to examine the probability of these slope movements' developments in today's conditions. In this work, the author tries to prove the impact of seismic activity and rapid changes of ocean water level on the slope stability model of San Andrés giant landslide on the El Hierro Island, Canary Islands archipelago. The geotechnical model parameters were obtained from laboratory analysis of rock material from the island. Then, slope stability models on San Andrés giant landslide were prepared using different combinations of input...

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