DOI: 10.1029/2017JF004515
Scopus记录号: 2-s2.0-85052381623
论文题名: Coupled Snow Cover and Avalanche Dynamics Simulations to Evaluate Wet Snow Avalanche Activity
作者: Wever N. ; Vera Valero C. ; Techel F.
刊名: Journal of Geophysical Research: Earth Surface
ISSN: 21699003
出版年: 2018
卷: 123, 期: 8 起始页码: 1772
结束页码: 1796
语种: 英语
英文关键词: avalanche dynamics modeling
; snowpack modeling
; wet snow avalanches
英文摘要: We present physics-based snowpack simulations for four snow seasons with detailed wet snow avalanche activity records. The distributed, spatially explicit simulations using the Alpine3D and SNOWPACK model show that the simulated snowpack in the release areas of documented wet snow avalanches often exhibits its first wetting of the season on the release day. This first wetting is accompanied in the simulations by liquid water accumulating on capillary barriers, often formed by depth hoar layers. The strongest water accumulations and largest increases in percolation depth are found on the day of avalanche release. For individual avalanche paths, however, this only holds in 25%–30% of the cases. Assuming that the depth of the strongest water accumulation corresponds to the avalanche fracture depth, the avalanche dynamics model RAMMS-Extended was run using simulated snowpack properties as initial conditions in the release area and boundary conditions along the avalanche path. On average, the simulated affected area by the avalanche and runout distance for the release day are statistically significant in closer agreement with the observations than two days before the release. This does not hold for the simulations of 1 day before and 1 and 2 days after the release. This suggests that fracture depths and the temporal evolution of percolation depths are adequately simulated within a ±1-day period. The results show a large potential for distributed snow cover and avalanche dynamics simulations to assess wet snow avalanche hazards, although predictions for individual avalanche paths remain challenging. ©2018. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113438
Appears in Collections: 气候减缓与适应
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作者单位: School of Architecture, Civil and Environmental Engineering, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland; WSL Institute for Snow and Avalanche Research SLF, Davos, Switzerland; Department of Atmospheric and Oceanic Sciences, University of Colorado Boulder, Boulder, CO, United States; Wyssen Avalanche Control, Reichenbach, Switzerland; Department of Geography, University of Zurich, Zurich, Switzerland
Recommended Citation:
Wever N.,Vera Valero C.,Techel F.. Coupled Snow Cover and Avalanche Dynamics Simulations to Evaluate Wet Snow Avalanche Activity[J]. Journal of Geophysical Research: Earth Surface,2018-01-01,123(8)