NDLI: Dynamics and mass balance of the 2007 Cima Una rockfall (Eastern Alps, Italy)

Content Provider	Springer Nature Link
Author	Viero, Alessia Furlanis, Sandro Squarzoni, Cristina Teza, Giorda Galgaro, Antonio Gialla, Piero
Copyright Year	2012
Abstract	On October 12th, 2007 about 40,000 m3 of dolomitic rock detached from the northern wall of the peak known as “Cima Una” (Val Fiscalina, Sesto Dolomites, Bolzano, Italy), and fell 900 m to Fiscalina Valley below. The event generated a dense dust cloud, which traveled up to 4 km from the source area. The failure surface was formed by two near-vertical surfaces, almost perpendicular to each other. The orientation of these surfaces is consistent with two of the main regional tectonic sets. Only a small portion of the fallen material appeared to be preserved as blocks deposited at the base of the rock wall. About a fifth of the fallen mass was deposited on a colluvial cone. The missing mass, estimated to be about 80 %, may be represented by highly fragmented rock in part deposited as sand on the valley floor and in part dispersed as a dense dust cloud generated during the rockfall. There appears to be a deficit of deposited material, which could lead underestimation in the calculation of rock–cliff recession rates. The dynamics of the rockfall, strongly conditioned by the local topography, partially explains the intense rock breakage and the generation of the dust cloud. The rockfall was not caused by an external trigger, such as an earthquake or heavy rainfall; the failure was most likely progressive due to mechanical and physical degradation along highly stressed failure surfaces, possibly promoted by permafrost degradation and freeze and thaw processes.
Starting Page	393
Ending Page	408
Page Count	16
File Format	PDF
ISSN	1612510X
Journal	Landslides
Volume Number	10
Issue Number	4
e-ISSN	16125118
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2012-06-22
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Rockfall Dust cloud Airblast Laser scanning Dolomites Alps Natural Hazards Geography (general) Agriculture Civil Engineering
Content Type	Text
Resource Type	Article
Subject	Geotechnical Engineering and Engineering Geology

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