Evaluation of meteorological controls of reconstructed rockfall activity in the Czech Flysch Carpathians

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Authors

ŠILHÁN Karel BRÁZDIL Rudolf PÁNEK Tomáš DOBROVOLNÝ Petr KAŠIČKOVÁ Lucie TOLASZ Radim TURSKÝ Ondřej VÁCLAVEK Marek

Year of publication 2011
Type Article in Periodical
Magazine / Source Earth Surface Processes and Landforms
MU Faculty or unit

Faculty of Science

Citation
Doi http://dx.doi.org/10.1002/esp.2211
Field Earth magnetism, geography
Keywords rockfall; dendrogeomorphology; freeze-thaw; precipitation; Czech Flysch Carpathians
Description The spatio-temporal characteristics of rockfall activity were studied at four localities representative of old landslides in the highest part of the Czech Flysch Carpathians (Moravskoslezské Beskydy Mountains). Historical activity, chronology, and spatial context of rockfall activity were reconstructed using dendrogeomorphic techniques and rockfall rate index (RR). A total of 1132 increment cores from 283 trees growing in the rockfall transport and accumulation zones enabled the dating of 989 rockfall events. Reconstruction of a 78-year-long RR chronology suggests similar rockfall histories and trends at all study sites, indicating the existence of major common factors driving rockfall dynamics in the region. Temporal analysis and correlation of the RR series obtained with monthly mean temperatures, numbers of days with temperature transitions through 0 deg C and monthly precipitation totals show that meteorological characteristics have evident but variable influence on rockfall activity.
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