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Title: Alpine landslide risk scenario: run-out modelling using a 3D approach
Authors: Codeglia, Daniela
Dixon, Neil
Bossi, Giulia
Marcato, Gianluca
Keywords: Back-analysis
Landslide dam
Rock slide
Run-out model
Issue Date: 2017
Publisher: © Italian Geological Society
Citation: CODEGLIA, D., 2017. Alpine landslide risk scenario: run-out modelling using a 3D approach. Rendiconti Online Societa Geologica Italiana, 42, pp. 14-17.
Abstract: Rockslides of considerable volume developing on the flanks of narrow alpine valleys represent a significant hazard for the potential of river damming and consequent sudden discharge of water. A limestone rock mass of about 650,000 m3 endangers a portion of the upper course of Tagliamento River valley in north-eastern Italy. This section of the valley is prone to detachment of rock landslides due to its structural setting and it has a history of landslide damming: in the literature two huge events are widely documented and a third event is identified and described in this paper. The ancient detachment crown and the corresponding deposit can be observed in the portion of slope adjacent to the unstable rock mass. This paper deals with the run-out model of the unstable rock mass using a Smoothed Particles Hydrodynamics (SPH) model implemented in the DAN3D code. In order to select the appropriate material parameters, the ancient rockslide was back-analysed. Subsequently, the parameters were applied to the present unstable portion of the slope to determine the location and dimensions of the deposit that could be formed. It is demonstrated that the deposit has the potential to create a natural dam across the Tagliamento River that would form a 500,000 m3 lake. Although the lake will have limited dimensions, this would represent a very high risk for the downstream villages and infrastructures in case of a sudden collapse of the natural dam.
Description: This paper was accepted for publication in the journal Rendiconti Online Societa Geologica Italiana and the definitive published version is available at http://dx.doi.org/10.3301/ROL.2017.03
Version: Accepted for publication
DOI: 10.3301/ROL.2017.03
URI: https://dspace.lboro.ac.uk/2134/24682
Publisher Link: http://dx.doi.org/10.3301/ROL.2017.03
ISSN: 2035-8008
Appears in Collections:Published Articles (Architecture, Building and Civil Engineering)

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