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| Titel |
Evaluation of a 3-D rockfall module within a forest patch model |
| VerfasserIn |
W. Rammer, M. Brauner, L. K. A. Dorren, F. Berger, M. J. Lexer |
| 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 ; 10, no. 4 ; Nr. 10, no. 4 (2010-04-12), S.699-711 |
| Datensatznummer |
250008075
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| Publikation (Nr.) |
 copernicus.org/nhess-10-699-2010.pdf |
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| Zusammenfassung |
| Many slopes in the Alps are prone to rockfall and forests play a vital role
in protecting objects such as (rail) roads and infrastructure against
rockfall. Decision support tools are required to assess rockfall processes
and to quantify the rockfall protection effect of forest stands. This paper
presents results of an iterative sequence of tests and improvements of a
coupled rockfall and forest dynamics model with focus on the rockfall
module. As evaluation data a real-size rockfall experiment in the French
Alps and two 2-D rockfall trajectories from Austria and Switzerland were
used. Modification of the rebound algorithm and the inclusion of an
algorithm accounting for the sudden halt of falling rocks due to surface
roughness greatly improved the correspondence between simulated and observed
key rockfall variables like run-out distances, rebound heights and jump
lengths for the real-size rockfall experiment. Moreover, the observed jump
lengths and run-out distances of the 2-D trajectories were well within the
stochastic range of variation yielded by the simulations. Based on
evaluation results it is concluded that the rockfall model can be employed
to assess the protective effect of forest vegetation. |
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