A new Swiss test-site for avalanche experiments has been built to study the overall dynamic behaviour of dense-flow and powder-snow avalanches and to measure avalanche impact forces along their path. The site began operation in 1997/1998 and is a milestone of avalanche dynamics research at the WSL-SLF.

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Wir erforschen kleinskalige granulare Flüsse im Labor. Unser Ziel ist es, die Dichte und interne Spannungen zu modellieren, die für das Fliessverhalten von Murgängen und Lawinen entscheidend sind.

Available languages: German

The iPhone and Android application “White Risk mobile” supports winter sports enthusiasts in planning and on tours away from secured ski areas. Current avalanche bulletins, snow maps, travel advice and background information are available any time. The free app download is available from the iTunes App Store and the Android Market.

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Within the framework of an international research project, the SLF and its German and Austrian partners are using a radar system to conduct a non-destructive investigation of the snowpack from underneath. The goal is to observe the individual layers of the snowpack and their properties and change over time.

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Im Frühling gleiten vielerorts Nassschneelawinen bis ins Tal. Bisher wurde jedoch kaum systematisch erforscht, wie diese Lawinen genau entstehen. Das SLF hat deshalb mehrere Forschungsprojekte dazu gestartet.

Available languages: German French

In the field of natural hazards there is a strong need for process models. Researchers of WSL develop a unified software package, for both research and practice, where different kinds of processes are combined in one tool. The package consists of the process modules debris flow, rockfall, snowcover and avalanche, a protect module and a visualization module.

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Information on the expected volume and flow velocity of the avalanche are used to estimate the necessary dam height by a rule of thumb. However these estimation requires expert knowledge to judge the influence of factors such as terrain structure, expected flow characteristics of the avalanche and dam geometry in a proper way.

Available languages: German English

Numerical simulations of natural hazards are based on digital terrain models. We investigate the advantages and disadvantages of different remote sensing based technologies to generate such terrain models for high alpin regions.

Available languages: German English

Remote Sensing instruments on airplanes, helicopters or satellites are getting more and more important for natural hazard research. They can acquire up-to-date, high resolution imagery shortly after a disaster strikes even within poorly accessible areas. We investigate at the SLF how such sensor systems can be applied for future tasks.

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Avalanche researchers at the SLF investigate how snow avalanches flow to answer important questions – how fast avalanches flow, how far they flow and what forces they exert on buildings and other objects. Mathematical models are used to calculate velocity, runout distances and impact pressures. SLF researchers have recently proposed a more inclusive mathematical model that can model avalanches of different size and flow type.