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| Titel |
Implications of spatial distribution of rockfall reconstructed by dendrogeomorphological methods |
| VerfasserIn |
K. Šilhán, T. Pánek, J. Hradecký |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1561-8633
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| Digitales Dokument |
URL |
| Erschienen |
In: Natural Hazards and Earth System Science ; 13, no. 7 ; Nr. 13, no. 7 (2013-07-12), S.1817-1826 |
| Datensatznummer |
250018556
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| Publikation (Nr.) |
 copernicus.org/nhess-13-1817-2013.pdf |
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| Zusammenfassung |
| Rockfall is a dangerous geomorphological process. The prediction of
potentially threatened areas requires thorough reconstruction of spatial
rockfall activity. Dendrogeomorphic methods allow precise determination of
both temporal and spatial occurrences of rockfall without the necessity of
long-term monitoring. At the case-study site of Taraktash, located among
southern slopes of the Crimean Mountains, 114 Crimean pine trees
(Pinus nigra ssp. pallasiana) were sampled on a talus slope
located under a 150 m high rockwall. Based on their age, the trees were
divided into two distinct groups (young and old trees). Considerable
disturbance in the age structure of the trees on the talus was probably
caused by a series of strong earthquakes. Major differences were identified
in the ability of young and old trees to record a rockfall event. We found
that in the first decades of their growth, the ability of the studied
P. nigra to record rockfall events gradually increased. The trees
showed the highest sensitivity at the age of 80 to 90 yr; after that
age their sensitivity gradually decreases. Two indicators were selected for
the spatial reconstruction of rockfall events (the number of rockfall events
per tree and recurrence interval). The highest activity was identified on the
talus using selected indicators. |
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