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Article

Weather Simulation of Extreme Precipitation Events Inducing Slope Instability Processes over Mountain Landscapes

1
Department of Physics, Università degli Studi di Torino, Via Giuria 1, 10125 Torino, Italy
2
Earth Sciences Department “A. Desio”, Università degli Studi di Milano, Via Mangiagalli 34, 20133 Milano, Italy
3
Studio di Geologia Luciani, Viale Castelli 17, 28868 Varzo, Italy
*
Author to whom correspondence should be addressed.
Appl. Sci. 2020, 10(12), 4243; https://doi.org/10.3390/app10124243
Received: 15 May 2020 / Revised: 8 June 2020 / Accepted: 16 June 2020 / Published: 20 June 2020
Mountain landscapes are characterised by a very variable environment under different points of view (topography, geology, meteorological conditions), and they are frequently affected by mass wasting processes. A debris flow that occurred along the Croso stream, located in the Italian Lepontine Alps in the Northern Ossola Valley, during summer 2019, was analysed from a geological/geomorphological and meteorological point of view. The debris flow was triggered by an intense precipitation event that heavily impacted a very restricted area over the course of three hours. A previous debris flow along the same stream occurred in Autumn 2000, but it was related to an intense and prolonged rainfall event. The slope was characterised in terms of sediment connectivity, and data were retrieved and elaborated from the Web-GIS (Web-Geographic Information System) database of the IFFI-Italian Landslide Inventory and historical archives of landslides. Both the events were analysed through the weather research and forecasting (WRF) model applying a very high horizontal grid spacing with the aim of catching the precipitation patterns and timings. The obtained results are compared with the observed precipitation at a selection of weather stations in the area. The simulation of WRF that measured the timing in total precipitation and in its minor steps could be considered reliable. Moreover, it reveals to be appropriate for detecting in advance the meteorological conditions potentially triggering mass-wasting processes affecting slopes featuring high connectivity conditions and lithotypes characterised by a high Landslide Susceptibility Index. View Full-Text
Keywords: weather simulation; precipitation; WRF; slope instability processes; complex mountain environment; Northern Ossola Valley (Italy) weather simulation; precipitation; WRF; slope instability processes; complex mountain environment; Northern Ossola Valley (Italy)
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MDPI and ACS Style

Golzio, A.; Bollati, I.M.; Luciani, M.; Pelfini, M.; Ferrarese, S. Weather Simulation of Extreme Precipitation Events Inducing Slope Instability Processes over Mountain Landscapes. Appl. Sci. 2020, 10, 4243. https://doi.org/10.3390/app10124243

AMA Style

Golzio A, Bollati IM, Luciani M, Pelfini M, Ferrarese S. Weather Simulation of Extreme Precipitation Events Inducing Slope Instability Processes over Mountain Landscapes. Applied Sciences. 2020; 10(12):4243. https://doi.org/10.3390/app10124243

Chicago/Turabian Style

Golzio, Alessio, Irene M. Bollati, Marco Luciani, Manuela Pelfini, and Silvia Ferrarese. 2020. "Weather Simulation of Extreme Precipitation Events Inducing Slope Instability Processes over Mountain Landscapes" Applied Sciences 10, no. 12: 4243. https://doi.org/10.3390/app10124243

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