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Topic 6 - The Vajont rockslide

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Topic 6 - The Vajont rockslide
"Risk perception" for social science implies that risk can be judged through mental models embedded in social/cultural environments and shaped by media and peer influences. This paper reviews risk perception dynamics in Vajont case. The disaster of 1963 left a strong mark on morphology and history of the communities and in the national public opinion. The event determined the end of a local approach to inhabiting a territory. While inhabitants of Piave valley had adapted to the mountain environment, the na
Topic 6 - The Vajont rockslide
The Vajont landslide has been the object of several studies because of its catastrophic consequences and particular evolution. Several qualitative or quantitative models have been presented in the last 50 years, but a complete explanation of all relevant geological and mechanical processes still remains elusive. In order to better understand the mechanics and dynamics of the 1963 event, we have reconstructed the first 3D geological model of the landslide, which allowed us to accurately investigate the lands
Topic 6 - The Vajont rockslide
The Vajont Valley is mainly known for the catastrophic event of 9 October 1963, when a vast landslide occurred on the southern slope of the Vajont dam reservoir, causing a giant wave of water that flooded the Piave Valley below. Since then, many studies of the geological and geomechanical aspect of the landslide have been carried out, while very few studies have focused on the hydrogeological characteristics of this area. This paper proposes a hydrogeological conceptual model for the carbonate aquifers of t
Topic 6 - The Vajont rockslide
The 1963 collapse of the northern slope of the Monte Toc in the Vajont reservoir is probably one of the most studied landslides worldwide. During the various studies several numerical models have been proposed to explain the collapse dynamics but a comprehensive and reliable insight into the failure kinematics is still missing. A major step forward in the understanding of the landslide mechanisms is represented by the reconstruction of the geometry of the different geological units within the landslide body
Topic 6 - The Vajont rockslide
In this paper a study on the hydrology of Vajont creek, in northern Italy, is presented. The Vajont creek is dramatically known because of the disaster which occurred in 1963, when, before the dam located on the creek between the towns Erto and Casso started its operation, a huge landslide detached from the Toc mountain, falling in the reservoir during the filling stage. Consequently, a water wave overtopped the dam. Although the dam is still there, the damage caused by the wave was so high that this disast
Topic 6 - The Vajont rockslide
The Vajont rockslide is not the largest rockslide in the Italian Alps, but it is a reference at a worldwide scale due to its complex behaviour and catastrophic effects in terms of economic losses and human casualties. An essential aspect to be considered in any kind of approach to the Vajont landslide, whether hydrogeological, geomorphological or related to geomechanical modelling, is the highly three-dimensional character of the geological structures of the Monte Toc northern slope. The knowledge of the
Topic 6 - The Vajont rockslide
Fifty years ago the giant Vajont landslide slipped in the homonymous lake and caused a disaster. The purpose of this work is to apply classical limit-equilibrium methods as well as a the variant developed by Tinti & Manucci (2006, 2008) and called Minimum Lithostatic Deviation (MLD) method to analyse the stability of the Mt Toc flank from where the slide detached and to study the effect of the various factors influencing stability. The analysis was conducted on two profiles, one representing the west-side
Topic 6 - The Vajont rockslide
In the framework of the Research Strategic Project Geo-Risks "Geological and hydrological processes: monitoring, modeling and impact in the North-East Italy", a seismic reflection survey and surface waves analysis were performed on the Mt. Toc landslide in the Vajont Valley, Italy. The aim of the geophysical measurements was to obtain a 2D geophysical model of the entire landslide body down to the sliding surface depth and the characterization of rock seismic velocities. Due to the critical environment, ano
Topic 6 - The Vajont rockslide
The Vajont Slide has been studied for half a century, yet questions about its kinematics and dynamics still remain. Application of state-of-the-art numerical techniques aids in understanding the slide’s mechanical behaviour. In the current paper, we use four two- and three-dimensional finite element, distinct element, and lattice-spring modelling codes in a toolbox approach to conduct a forensic, exploratory investigation of the kinematics of the slide. We examined the influence of rock mass properties an
Topic 6 - The Vajont rockslide
The 1963 Vajont Slide is one of the most studied natural disasters in the world, with over 150 publications on its cause, mechanisms, behaviour, and effects. Most of these studies have considered the event from a descriptive, engineering geology, structural geology, or geophysical perspective, and the geomorphology of the Vajont Slide and the Vajont Valley has been neglected in all but a few papers. Nonetheless, geomorphological features and processes provide valuable insights into the preconditions and mov
Topic 6 - The Vajont rockslide
The use of numerical modelling to simulate natural phenomena is increasingly widespread, mainly owing to computational capacity improving that makes it possible to face the complexity of the modelling techniques. The 1963 Vajont landslide represents a very interesting case study. The abundance of available data, before and after the event, allows the reconstruction of the initial and final mass morphology. Moreover, the mass compactness and the sudden velocity increase, as inferred from post-event observati
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