Blar i Norwegian Geotechnical Institute (NGI) Digital Archive på forfatter "Hestnes, Erik"

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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). ...

    • 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 ...

    • 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 ...

    • 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 ...

    • 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 ...

    • 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). ...

    • A contribution to the prediction of slush avalanches 

      Hestnes, Erik (Chapter, 1985)
      Slush avalanches, primarily known from uninhabited arctic and mountainous regions, every year cause damage to man and property in Norway. Seeking objective criteria to identify their hazard zones, and methods for their ...

    • Dense avalanche numerical modeling interaction between avalanche and structures 

      Naaim, Mohamed (NGI Publication;203, Chapter, 1998)
      Applications of the Saint Venant equations were extended to rapid gravity flows of geophysical fluid with a non-newtonian behavior such as snow avalanches. This paper presents a numerical and physical approach for snow ...

    • Design criteria for cylindrical masts exposed to snow creep forces. 

      Larsen, Jan Otto; Kristensen, Krister (NGI Publication;203, Chapter, 1998)
      Based on 23 years of measurements of snow creep forces on cylindrical masts, a relation between the pressure and snow parameters as snow depth, density and temperature, has been established. The long observation period has ...

    • The differentiation of thaws in connection with slushflow occurrences. 

      Chernouss, Pavel; Tyapkina, Olga; Hestnes, Erik; Bakkehøi, Steinar (NGI Publication;203, Chapter, 1998)
      Classification of meteorological conditions accompanying slushflow occurrences is attempted. Days with mean daily air temperature above O°C have been chosen for the analysis. Each day has been described with a set of ...

    • The diversities of large slushflows illustrated by selected cases. 

      Hestnes, Erik; Kristensen, Krister (The International Snow Science Workshop (ISSW) Proceedings;, Chapter, 2010)
      Rapid mass movement of water-saturated snow, usually known as slushflow or slush avalanche, is a major natural hazard in Norway. The destructive forces are larger than those observed from other snow related mass flows of ...

    • Dynamics of two-layer slushflows 

      Bozhinskiy, A.N.; Nazarov, A.N. (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). ...

    • Finite element modeling of snow-pack lying on a slope, considering snow as isotropic compressible viscoplastic media 

      Mishra, Aloke; Mahajan, Puneet (NGI Publication;203, Chapter, 1998)
      A simple extension of the von Mises plasticity is proposed in which the equivalent stress is defined as a function of deviatoric and hydrostatic stresses. Non-linearity is accounted by extending NortonHoff equation for ...

    • Forecast of avalanche danger for the intracontinental regions of Northeast of Eurasia 

      Seliverstov, Yuri G.; Glazovskaya, Tatiana G. (NGI Publication;203, Chapter, 1998)
      The research area includes the Kolyma riverhead with tributaries. For this territory the extreme continental climate with very frost winters is common. The duration of snow cover is 200-230 days. The domination of low ...