Dendrogeomorphological investigation of deep-seated slope deformations in flysh rocks, Czech Republic
Abstract
Extensive dendrogeomorphological investigation in several locations of the flysh rocks of the Outer Western Carpathians, Czech Republic was performed. Recent activity of four different types of deep-seated landslides (Pustevny, Hluboče, Vsetínské vrchy, Zlín - Prštné) was evaluated through geomorphologic mapping and sampling of tilted or curved trees.
Two cores per tree were taken in all sites apart from the Hluboče landslide. The tree-ring analyses were performed on photos with fixed scale.
By the geomorphological mapping and tree-ring analysis we identified the most active parts of the landslides and also several periods of their activity. Some time periods of increased movement activity were detected on all sites.
First period is the end of 1940s, second one is the beginning of the 1960s. Regional-wide landslide activity from July 1997 is recorded in tree growth anomalies within all studied sites as well.