Abstract
Large rockslides are characterized by complex spatial and temporal evolution, in addition to non-linear displacement trends and the significant effects of seasonal or occasional events on their behaviour. The displacement rate and the landslide evolution are intensely influenced by many factors like lithology, structural and hydrological settings, other than meteorological and climatic factors (e.g. snowmelt and rainfall). The two investigated areas are located on the Italian Alps, Mont de La Saxe landslide affects the upper part of Valle d’Aosta region (Courmayeur) and the Ruinon landslide is sited in upper Lombardia Region (Valfurva, Santa Caterina). Both landslides are sited into a larger deep-seated gravitational slope deformation (DSGSD) and they are deeply monitored with different systems: GB-InSAR, monitoring optical targets, a GPS network and multi-parametric borehole probes. We experiment the use of statistical approach for analysis of displacement rate derived from monitoring activity to support the choice of threshold values for the management of Early Warning System, by considering also the minimization of false alarms.
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Acknowledgements
The authors thank the Geological Surveys of Valle d’Aosta Region (RAVA) and ARPA Lombardia (Agenzia Regionale Protezione Ambientale) for providing the data used in this study. Furthermore, we want to thank Ellegi s.r.l. and Davide Leva for support in data analysis.
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Alberti, S., Crosta, G.B., Rivolta, C. (2017). Statistical Analysis of Displacement Rate for Definition of EW Thresholds Applied to Two Case Studies. In: Mikoš, M., Arbanas, Ž., Yin, Y., Sassa, K. (eds) Advancing Culture of Living with Landslides. WLF 2017. Springer, Cham. https://doi.org/10.1007/978-3-319-53487-9_32
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DOI: https://doi.org/10.1007/978-3-319-53487-9_32
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