Natural hazard research sites and facilities When an avalanche comes thundering down Vallée de la Sionne or a debris flow rages in Illgraben, we are on the scene. We use state-of-the-art measuring instruments [...] natural conditions. The SLF has several such large-scale instrumented field sites: In Valléé de la Sionne (Arbaz, Valais), we can artificially trigger avalanches – when the snow and weather situation permits [...] Topics Investigating snow avalanche dynamics The full-scale avalanche dynamics test site Vallée de la Sionne (VdlS) is providing scientists and engineers with essential data to understand and model avalanche
flourished under an agreement between the WSL station in Sion and the canton of Valais. Vallée de la Sionne: artificial avalanche released on January 30, 1999. The establishment in Valais of a WSL outpost [...] full-scale experimental sites for the purpose of research into natural hazards: in the Vallée de la Sionne at Arbaz, the only site of its kind in the world for studying major avalanches at Illgraben , for
flow, we conduct experiments using real avalanches. Our test site is located at the Vallée de la Sionne , in Arbaz, Canton Valais. During the avalanche descent, more than 200 sensors measure parameters [...] modern remote sensing techniques such as radars and drones. Figure 1. Obstacles at the Vallée de la Sionne are used to study the interaction between man-made structures and avalanches. Foto: Pierre Huguenin [...] An avalanche simulated using the discrete element method (DEM) interacting with the Vallée de la Sionne pylon. The simulation is compared with data collected with a high-speed camera. Right: simulation
to analyse natural phenomena in the field – for example in our avalanche test site in Vallée de la Sionne. We have already been conducting research and taking measurements at some of these sites for decades
velocities and heights, as well as avalanche deposit patterns in the terrain. Vallée de la Sionne Figure 5: Vallée de la Sionne avalanche test site – view of the bunker after an avalanche release (SLF archive) [...] archive). In 1997 the SLF initiated construction of an extensive avalanche test site in Vallée de la Sionne (Fig. 5). Experiments conducted there have shown that multiple physical relationships exist within avalanches
that the observations can be directly related to those obtained with other sensors at Vallée de la Sionne (VDLS) avalanche test site, where the radar is actually installed. The quality of the data from the [...] Keylock (University College London). Fullscreen Image 1 of 3 Figure 1: The bunker at Vallée de la Sionne showing the transmit antenna (on the right), as well as the externally (on the top) mounted phased [...] "GeoSpace": Avalanches more complex than previously thought Large scale avalanche test site "Vallée de la Sionne": Overview and Playlist
major role in setting up and operating the renowned avalanche dynamics test site in Vallée de la Sionne (Arbaz district). He also supervised facilities investigating other natural hazards – debris flows
avalanche dynamics at the full-scale test-site: Vallée de la Sionne / Cmne d'Arbaz, Valais The full-scale avalanche dynamics test site Vallée de la Sionne (VdlS) is providing scientists and engineers with essential [...] -- and validate Switzerland’s snow hazard mapping guidelines. A unique test-site The Vallée de la Sionne test site is located in the community of Arbaz 8 km to the North of Sion, the capital of the Swiss [...] channels eventually converge to form a wide avalanche path leading to the valley bottom and the river La Sionne at 1500 m. The snow mass flows past instrumented obstacles – wedges and pylons – instrumented with
understand these processes. We therefore need to be able to see inside avalanches. Our Vallée de la Sionne avalanche test site at Arbaz in the canton of Valais has been operating since 1997. The only facility
that control avalanche dynamics using field experiments such as those performed at the Vallée de la Sionne test site , as well as laboratory tests, (2) develop new methods for measuring dynamical variables
results ( Bühler et al. 2011 ). Analysis of avalanche experiments At the SLF test site in Vallée de la Sionne (town of Arbaz), large-sized avalanches can be artificially triggered. In order to obtain the greatest [...] and calibrating the avalanche dynamics model RAMMS . Thermalkamera-Video der im Vallée de la Sionne (Gemeinde Arbaz) ausgelösten Lawine vom18. Januar 2016. Die Anrisszone ist deutlich wärmer als der
stations distributed over the entire Swiss alpine territory. 1997/98 In winter 1997/98 The Vallée de la Sionne test site for avalanche dynamics is commissioned. From winter 997/1998, the national avalanche bulletin [...] prevention platform "White Risk" developed by the SLF and SUVA goes online 2016 The Vallée de la Sionne facility celebrates its 20th anniversary, and the cooperation agreement between the Canton of Valais