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Assessing the effect of lithological setting, block characteristics and slope topography on the runout length of rockfalls in the Alps and on the island of La Réunion

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Wegner, Kerstin ; Haas, Florian ; Heckmann, Tobias ; Mangeney, Anne ; Durand, Virginie ; Villeneuve, Nicolas ; Kowalski, Philippe ; Peltier, Aline ; Becht, Michael:
Assessing the effect of lithological setting, block characteristics and slope topography on the runout length of rockfalls in the Alps and on the island of La Réunion.
In: Natural Hazards and Earth System Sciences. 21 (2021) 3. - S. 1159-1177.
ISSN 1561-8633 ; 1684-9981

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Volltext Link zum Volltext (externe URL):
https://doi.org/10.5194/nhess-21-1159-2021

Kurzfassung/Abstract

In four study areas within different lithological settings and rockfall activity, lidar data were applied for a morphometric analysis of block sizes, block shapes and talus cone characteristics. This information was used to investigate the dependencies between block size, block shape and lithology on the one hand and runout distances on the other hand. In our study, we were able to show that lithology seems to have an influence on block size and shape and that gravitational sorting did not occur on all of the studied debris cones but that other parameters apparently control the runout length of boulders. Such a parameter seems to be the block shape, as it plays the role of a moderating parameter in two of the four study sites, while we could not confirm this for our other study sites. We also investigated the influence of terrain parameters such as slope inclination, profile curvature and roughness. The derived roughness values show a clear difference between the four study sites and seem to be a good proxy for block size distribution on the talus cones and thus could be used in further studies to analyse a larger sample of block size distribution on talus cones with different lithologies.

Weitere Angaben

Publikationsform:Artikel
Sprache des Eintrags:Englisch
Institutionen der Universität:Mathematisch-Geographische Fakultät > Geographie > Lehrstuhl für Physische Geographie
DOI / URN / ID:10.5194/nhess-21-1159-2021
Open Access: Freie Zugänglichkeit des Volltexts?:Ja
Peer-Review-Journal:Ja
Verlag:Copernicus
Die Zeitschrift ist nachgewiesen in:
Titel an der KU entstanden:Ja
KU.edoc-ID:26389
Eingestellt am: 08. Apr 2021 12:57
Letzte Änderung: 09. Aug 2022 08:56
URL zu dieser Anzeige: https://edoc.ku.de/id/eprint/26389/
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