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Topic 3 - Monitoring large slope instabilities

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Topic 3 - Monitoring large slope instabilities
The risk posed by large rockslides in Norway is due to long run-out, the possibilities for river damming and the generation of disastrous tsunamis in fjords. The investigations, monitoring and early-warning that have been designed and implemented for the Norwegian rockslides follows strong requirements guided in national codes. Extensive investigations and implementation of relatively dense sensor network is needed in order to achieve reliable and robust monitoring of large and complex rockslides. The Nor
Topic 3 - Monitoring large slope instabilities
The importance of the reference engineering-geology model of a slope is a concept well established in the scientific and technical community facing on large infrastructures. The engineering-geology model is in fact a fundamental informative layer to understand and predict the structure-slope interactions and to design stabilization countermeasures. Such an issue has a relevant role in the case of unstable slopes: at this regard the Vajont case history represents a worldwide reference. Engineering-geology m
Topic 3 - Monitoring large slope instabilities
The paper focuses on identification of tectonic setting on large slope instabilities in the area of Giudicarie Valley, located in the south-western sector of the Trentino-Alto Adige region (northern Italy), with particular reference to those phenomena inducing a high level of risk. The study area, located in the Southern Alps, shows a complex structural setting, mainly influenced by the south Giudicarie Line and its associated steep to subvertical faults WNW-dipping. Tectonic setting strongly influences the
Topic 3 - Monitoring large slope instabilities
This work, based on the results of a series of geotechnical and monitoring studies, analyses two landslides composed of heterogeneous altered marly clayey arenaceous rock and eluvial-colluvial deposits, located near the village of Acqualoreto (Central Italy). The landslides (called here A and B) are characterized by retrogressive movements approaching buildings and roads near the village and by different sliding surfaces between 10 and 25 m b.g.l. Maximum displacement rates were measured after the most sign
Topic 3 - Monitoring large slope instabilities
Åknes is a 54 mil. m3 rockslide at Storfjorden, Western Norway. It has the potential to form a devastating tsunami in the fjord, and therefore it is thoroughly investigated and continuously monitored. Five GB InSAR campaigns have been carried out since 2006 in order to investigate the patterns of surface displacement. Here we present the results of these measurements, and compare them with in situ measurements of surface displacement. The data provide detailed information on the displacement fields in the
Topic 3 - Monitoring large slope instabilities
This work is focused on very slow moving landslides and the new generation of Persistent Scatterers PSI (SqueeSAR™ processing, developed by Telerilevamento Europa) that allows to increase the density and the time series quality of interferometric data. The improvement in the time series quality helps also to understand the behaviour of some processes and to have a best comparison with traditional monitoring system and/or rainfall data. The consequent aim of the research is to evaluate the potential and t
Topic 3 - Monitoring large slope instabilities
Early-warning systems for sediment disasters are important tools for disaster risk reduction, achieving sustainable development, and ensuring livelihoods. In 2005, the Japanese government initiated a new nationwide early warning system for landslide disasters. The main methodology of the system involves setting a criterion for the occurrence of debris flows and slope failures based on several rainfall indices. However, these rainfall thresholds did not always work well and could not ensure early evacuation.
Topic 3 - Monitoring large slope instabilities
The Costa della Gaveta landslide is an active, deep and very slow landslide which is being monitored and studied since 2004. Recently new boreholes have been carried out and inclinometer tubes have been installed to deepen the comprehension of the 3D geometry and kinematics. Localized displacement on a slip surface is confirmed to be the prevailing movement mechanism. Thanks to the long term monitoring, even the slow internal viscous deformations of the landslide body have been evaluated and interpreted. So
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