Publisher © Czech Geological Survey, ISSN: 2336-5757 (online), 0514-8057 (print)
Numerical analysis of Silesian nappe gravitational disintegration by means of FDM (Case study: Radhošť-Pustevny)
Abstract
Mountain ridges of the Moravian-Silesian Beskydy Mts., built up by monoclinal flysch rocks of the Silesian Nappe, are known for very deep and large slope failures. Several possible ways of their origin were discussed during past decades in the literature, from periglacial climate influence in cold periods of Quaternary, through classical slope failures, up to deep-seated failure depending on regional neotectonic activity. This study is focused on changes of ground-water table as the possible mechanism of the failures origin. The analysis of Radhost-Pustevny massif was provided by means of numerical Finite Difference Method (FDM, Flac 5.0 code). High ground-water table (at the ground surface) verified as a possible trigger of these large and deep-seated translational failures on SE slopes of Radhošť-Pustevny ridge. The analysis was concerned to time evolution of the failure as well.
