Blar i NGI articles på emneord "Snow Avalanche"

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    • 3D modelisation of snow slabs stability. 

      Schillinger, Lauren; Daudon, Dominique; Flavigny, Etienne (NGI Publication;203, Chapter, 1998)
      Snow slabs stability is a real problem to study in a mecanical point of view. A non exhaustive review of the different factors used to evaluate this stability or instability is done. All of them have been done in two ...

    • Acoustic sensor to measure snowdrift and wind velocity for avalanche forecasting 

      Bolognesi, R.; Chritin, V.; Gubler, H. (NGI Publication;203, Chapter, 1998)
      A new mathematical model of slushflow dynamics is developed. A slushflow is treated as a two-layer flow. The lower layer consists of pure liquid phase (water) and the upper layer is a floating water saturated snow (slush). ...

    • Associations between shear strength of a buried surface hoar layer and stratigraphic, topographic and vegetation characteristics on a uniform slope. Extended abstract 

      Lutz, Eric; Birkeland, Karl W.; Schneebeli, Martin; Hansen, Kathy J.; Kronholm, Kalle (The International Snow Science Workshop (ISSW) Proceedings;, Chapter, 2006)
      In this study we quantify 1) changes in spatial and aspatial characteristics of the shear strength of a buried surface hoar layer, and 2) identify characteristics in terrain, vegetation and snow stratigraphy that can help ...

    • The avalanche accident at Vassdalen, Norway, 5th March 1986 

      Lied, Karstein (Journal article, 1988)
      Shortly after 1300 hrs on wednesday March 5, 1986, a snow avalanche released from Storebalak, a mountain located at Vassdalen in Nordland county. The avalanche struck 31 men from the North Norway Brigade while they were ...

    • The avalanche at Flateyri, Iceland October 26th 1995 and the avalanche history 

      Haraldsdóttir, Svanbjörg Helga (NGI Publication;203, Chapter, 1998)
      An avalanche struck the village Flateyri on 26.10.1995 killing 20 people. There was also an enormous property damage. The avalanche went further than previously known for avalanches from Skollahvilft. The weather conditions ...

    • Avalanche caused catastrophes on the mountainous rivers 

      Soldatov, A. I. (NGI Publication;203, Chapter, 1998)
      Alongside with the danger of snow avalanching for the objects and population, the subsequent phenomena caused by the avalanching are not less serious. One of such reasons can be the choked lakes and outflash floods on the ...

    • Avalanche defences for Flateyri, Iceland. From hazard evaluation to construction of defences. 

      Sigurdsson, Flosi; Tomasson, Gunnar G. (NGI Publication;203, Chapter, 1998)
      The village of Flateyri was hit by two major avalanches in 1995, with the latter one killing 20 of the 45 people caught in it. These, together with the catastrophic avalanche in the nearby Súôavík in January the same year, ...

    • Avalanche forecasting for transportation corridor and backcountry in Glacier National Park (BC, Canada) 

      Schweizer, Jürg; Jamieson, J. Bruce (NGI Publication;203, Chapter, 1998)
      The Avalanche Control Section at Rogers Pass is responsible for avalanche safety on the Trans Canada Highway and Canadian Pacific Railroad within Glacier National Park and for the daily issue of an avalanche warning bulletin ...

    • An avalanche forecasting program based on a modified nearest neighbour method. 

      Kristensen, Krister; Larsson, Christer (The International Snow Science Workshop (ISSW) Proceedings;, Chapter, 1994)
      As a part of an avalanche forecasting system, a modified nearest neighbour program is described. The system is intended to be used with forecast values for most ofthe parameters. The modifications consist of 1) the use of ...

    • Avalanche hazard mapping using numerical Voellmy-Fluid models 

      Gruber, Urs; Bartelt, Perry (NGI Publication;203, Chapter, 1998)
      One- and two-dimensional numerical dense-snow avalanche dynamics models using a Voellmy-fluid constitutive flow law have been developed in Switzerland recently. In order to apply these models in practice, they have been ...

    • The avalanche monitoring system av mount Pizzac 

      Sommavilla, Francesco; Sovilla, Betty (NGI Publication;203, Chapter, 1998)
      The monitoring system of Mount Pizzac has been created in order to study the avalanche dynamics and the effect of its impact on the structures. In its extreme dimensions the monitored avalanche gets off at 2200 meters and ...

    • The avalanche of la Tartera de la Pica (Andorra) 

      Furdada, Gloria; Vilaplana, Manuel Joan; Tomàs, Enric; Mas, David (NGI Publication;203, Chapter, 1998)
      The great extension of the avalanche path of "la tartera de la Pica" was identified during a systematic avalanche cartography in Andorra (Pyrenees). There are witnesses who, around 1930, saw the avalanche going down around ...

    • Avalanche risk along a 420 kv transmission line in Iceland. 

      Jónsson, Árni; Bakkehøi, Steinar; Hauksson, Sigurjón (The International Snow Science Workshop (ISSW) Proceedings;, Chapter, 2006)
      Two transmission lines between Fljótsdalur and Reyðarfjörður in northeast Iceland have been investigated concerning snow avalanche hazard. Given a specific level of probability of failure for both the lines less than ...

    • Avalanche run-out on counter-slopes 

      Moe, Arne; Bakkehøi, Steinar; Wieshofer, Sigrid; Domaas, Ulrik (Journal article, 2003)
      Counter-slopes in avalanche paths influence avalanche flow in similarways as defence structures. Measurements and calculations of run-outon such slopes will improve our understanding of retaining damdesign. We have studied ...

    • The avalanche situation in Neskaupstadur, Iceland : A preliminary defensive plan 

      Tomasson, Gunnar G.; Sigurdsson, Flosi; Rapin, François (NGI Publication;203, Chapter, 1998)
      The avalanche situation in the town of Neskaupstaôur is rather unique and in many respects more difficult than in any other place in Iceland. The avalanche risk is high in a large portion of the 2,7 km long residential ...

    • Calculation of maximum snow-avalanche run-out distance by use of digital terrain models. 

      Lied, Karstein; Toppe, Ronald (Journal article, 1989)
      This paper discusses how maximum snow-avalanche run-out distance may be calculated by a combination of topographic parameters and use of a digital terrain model. Digitized maps are being made for extensive areas of Norway. ...

    • Changes of the avalanche cadastre in the Czech part of the Giant Mts. 

      Spusta, Valerian ,; Kocianova, Milena (NGI Publication;203, Chapter, 1998)
      Giant Mts. are the highest and the only mountain range of the Czech Republic which features considerable avalanche activity. There are at average 22 avalanches events on 47 avalanche paths in a year. Human colonisation and ...

    • Chute experiments on slushflow dynamics. 

      Jaedicke, Christian; Kern, M.A.; Gauer, Peter; Baillifard, M.-A.; Platzer, K. (Journal article, 2008)
      Slushflows are gravity driven mass flows consisting of a mixture of snow and water, which exhibit considerable damage potential for endangered areas. An increase in global temperature and winter rain precipitation could ...

    • Climate database for avalanche consulting and warning in Norway 

      Jaedicke, Christian; Bakkehøi, Steinar (Journal article, 2007)
      Climate data is an essential tool for the study of weather induced geophysical processes like avalanches. Climate data provides on overview of normal and extreme weather conditions at a given location. This information can ...

    • Conclusions from a recent survey of avalanche computational models 

      Harbitz, Carl Bonnevie; Issler, Dieter; Keylock, Christopher J. (NGI Publication;203, Chapter, 1998)
      In this paper we summarise a survey report on computational models for snow avalanche motion that was developed within the frame-work of the EU research project SAME (Snow Avalanche Modelling, Mapping and Warning in Europe). ...