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
<p>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 li...
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2021-03-01
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| Series: | Natural Hazards and Earth System Sciences |
| Online Access: | https://nhess.copernicus.org/articles/21/1159/2021/nhess-21-1159-2021.pdf |
| _version_ | 1818454210471002112 |
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| author | K. Wegner F. Haas T. Heckmann A. Mangeney V. Durand V. Durand N. Villeneuve N. Villeneuve P. Kowalski P. Kowalski A. Peltier A. Peltier M. Becht |
| author_facet | K. Wegner F. Haas T. Heckmann A. Mangeney V. Durand V. Durand N. Villeneuve N. Villeneuve P. Kowalski P. Kowalski A. Peltier A. Peltier M. Becht |
| author_sort | K. Wegner |
| collection | DOAJ |
| description | <p>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.</p> |
| first_indexed | 2024-12-14T21:51:16Z |
| format | Article |
| id | doaj.art-494299a09c2d4120a37d7846be5c0da7 |
| institution | Directory Open Access Journal |
| issn | 1561-8633 1684-9981 |
| language | English |
| last_indexed | 2024-12-14T21:51:16Z |
| publishDate | 2021-03-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Natural Hazards and Earth System Sciences |
| spelling | doaj.art-494299a09c2d4120a37d7846be5c0da72022-12-21T22:46:14ZengCopernicus PublicationsNatural Hazards and Earth System Sciences1561-86331684-99812021-03-01211159117710.5194/nhess-21-1159-2021Assessing 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 RéunionK. Wegner0F. Haas1T. Heckmann2A. Mangeney3V. Durand4V. Durand5N. Villeneuve6N. Villeneuve7P. Kowalski8P. Kowalski9A. Peltier10A. Peltier11M. Becht12Chair of Physical Geography, Catholic University of Eichstätt-Ingolstadt, 85072 Eichstätt, GermanyChair of Physical Geography, Catholic University of Eichstätt-Ingolstadt, 85072 Eichstätt, GermanyChair of Physical Geography, Catholic University of Eichstätt-Ingolstadt, 85072 Eichstätt, GermanyInstitut de Physique du Globe de Paris, Université de Paris, CNRS, 75005 Paris, FranceInstitut de Physique du Globe de Paris, Université de Paris, CNRS, 75005 Paris, Francenow at: Helmholtz Centre Potsdam – German Research Centre for Geosciences, GFZ, 14473 Potsdam, GermanyInstitut de Physique du Globe de Paris, Université de Paris, CNRS, 75005 Paris, FranceLaboratoire GéoSciences Réunion, Université de La Réunion, 97744 Saint-Denis, FranceInstitut de Physique du Globe de Paris, Université de Paris, CNRS, 75005 Paris, FranceObservatoire Volcanologique du Piton de la Fournaise, Institut de Physique du Globe de Paris, 97418 La Plaine des Cafres, FranceInstitut de Physique du Globe de Paris, Université de Paris, CNRS, 75005 Paris, FranceObservatoire Volcanologique du Piton de la Fournaise, Institut de Physique du Globe de Paris, 97418 La Plaine des Cafres, FranceChair of Physical Geography, Catholic University of Eichstätt-Ingolstadt, 85072 Eichstätt, Germany<p>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.</p>https://nhess.copernicus.org/articles/21/1159/2021/nhess-21-1159-2021.pdf |
| spellingShingle | K. Wegner F. Haas T. Heckmann A. Mangeney V. Durand V. Durand N. Villeneuve N. Villeneuve P. Kowalski P. Kowalski A. Peltier A. Peltier M. Becht 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 Natural Hazards and Earth System Sciences |
| title | 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 |
| title_full | 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 |
| title_fullStr | 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 |
| title_full_unstemmed | 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 |
| title_short | 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 |
| title_sort | 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 reunion |
| url | https://nhess.copernicus.org/articles/21/1159/2021/nhess-21-1159-2021.pdf |
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