inscription
PORTAIL D'INFORMATION GÉOGRAPHIQUE

Rock fall dynamics and deposition : an integrated analysis of the 2009 Ahwiyah Point rock fall, Yosemite National Park, USA

Auteur(s) et Affiliation(s)

ZIMMER, V.L.
Dep. of Civil and Environmental Engineering, Univ. of California, Berkeley, Etats-Unis
COLLINS, B.D.
US Geological Survey, Menlo Park, California, Etats-Unis
STOCK, G.M.
National Park Service, Yosemite National Park, California, El Portal, Etats-Unis
SITAR, N.
Dep. of Civil and Environmental Engineering, Univ. of California, Berkeley, Etats-Unis


Description :
The AA. analyzed a combination of airborne and terrestrial LiDAR, high-resolution photography, seismic, and acoustic data in order to gain insights into the initiation, dynamics, and talus deposition of a complex rock fall in eastern Yosemite Valley. The results suggest that accumulation of individual rock-fall boulders tends to steepen talus slopes, whereas large, energetic rock falls tend to flatten them. Detachment and impact signals were recorded by seismic and acoustic instruments and highlight the potential use of this type of instrumentation for generalized rock fall monitoring, while LiDAR and photography data were able to quantify the cliff geometry, rock fall volume, source and impact locations, and geomorphological changes to the cliff and talus.


Type de document :
Article de périodique

Source :
Earth surface processes and landforms, issn : 0197-9337, 2012, vol. 37, n°. 6, p. eng-eng, Références bibliographiques : 39 ref.

Date :
2012

Editeur :
Pays édition : Royaume-Uni, Chichester, Wiley

Langue :
Anglais
Droits :
Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI)