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| Titel |
Preliminary assessment of rockslide and rockfall hazards using a DEM (Oppstadhornet, Norway) |
| VerfasserIn |
M.-H. Derron, M. Jaboyedoff, L. H. Blikra |
| 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 ; 5, no. 2 ; Nr. 5, no. 2 (2005-03-18), S.285-292 |
| Datensatznummer |
250002341
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| Publikation (Nr.) |
 copernicus.org/nhess-5-285-2005.pdf |
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| Zusammenfassung |
| The increasing availability and precision of digital elevation model (DEM)
helps in the assessment of landslide prone areas where only few data are
available. This approach is performed in 6 main steps which include: DEM
creation; identification of geomorphologic features; determination of the
main sets of discontinuities; mapping of the most likely dangerous
structures; preliminary rock-fall assessment; estimation of the large
instabilities volumes.
The method is applied to two the cases studies in the Oppstadhornet mountain
(730m alt): (1) a 10 millions m3 slow-moving rockslide and (2) a
potential high-energy rock falling prone area. The orientations of the
foliation and of the major discontinuities have been determined directly
from the DEM. These results are in very good agreement with field
measurements. Spatial arrangements of discontinuities and foliation with the
topography revealed hazardous structures. Maps of potential occurrence of
these hazardous structures show highly probable sliding areas at the foot of
the main landslide and potential rock falls in the eastern part of the
mountain. |
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