One of the effects of climate change is an expansion of the areas affected by flow-like landslides and an increase in human loss and economic damage caused by these natural hazards. The risk assessment connected to flow-like landslides utilizes several study approaches, such as the mapping of lands affected in the past, the understanding of triggering and propagation mechanisms through the monitoring of some watershed basins periodically subject to flow-like landslides, and the prediction of flow-like landslide propagation by means of advanced mathematical models. Research has made much progress in the development of advanced mathematical models able to account for various rheological models, 3D morphology of the slope, and engagement of other materials from the boundary, etc. Calibration of the parameters is, however, one of the most problematic phases of numerical modelling; the validation of propagation models is usually carried out on the basis of laboratory flume tests executed in very simple conditions or on the basis of data achieved from field observation, which are very often of low quality. After a brief state-of-art review concerning the most recent developments in flow-like landslide modelling, the present paper examines the techniques adopted for calibrating the models. Particularly, it considers the difficulties linked to the upscaling of rheological properties moving from the physical tests performed in viscometer or artificial flume, and attaining the estimation of average properties of the heterogeneous materials involved in real flow-like landslides.
Calibration of rheological properties of materials involved in flow-like landslides
Cola S.
;BREZZI, LORENZO;Gabrieli F.
2019
Abstract
One of the effects of climate change is an expansion of the areas affected by flow-like landslides and an increase in human loss and economic damage caused by these natural hazards. The risk assessment connected to flow-like landslides utilizes several study approaches, such as the mapping of lands affected in the past, the understanding of triggering and propagation mechanisms through the monitoring of some watershed basins periodically subject to flow-like landslides, and the prediction of flow-like landslide propagation by means of advanced mathematical models. Research has made much progress in the development of advanced mathematical models able to account for various rheological models, 3D morphology of the slope, and engagement of other materials from the boundary, etc. Calibration of the parameters is, however, one of the most problematic phases of numerical modelling; the validation of propagation models is usually carried out on the basis of laboratory flume tests executed in very simple conditions or on the basis of data achieved from field observation, which are very often of low quality. After a brief state-of-art review concerning the most recent developments in flow-like landslide modelling, the present paper examines the techniques adopted for calibrating the models. Particularly, it considers the difficulties linked to the upscaling of rheological properties moving from the physical tests performed in viscometer or artificial flume, and attaining the estimation of average properties of the heterogeneous materials involved in real flow-like landslides.Pubblicazioni consigliate
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