Blar i NGI articles på emneord "Snow Avalanche"
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Dense avalanche numerical modeling interaction between avalanche and structures
(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 of snow avalanche deflecting dams
(Chapter, 2000)Extensive effort has been put into improved understanding of avalanche deflection over the last two years. This paper discusses construction of deflecting dams in steep terrain, and gives an in-depth description of the ... -
The differentiation of thaws in connection with slushflow occurrences.
(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 ... -
Dynamics of two-layer slushflows
(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 effect of dam constructions as mitigative measures: 14 years of experience from a full-scale project
(Lecture, 1996)The Ryggfonn project is a full-scale project for determination of avalanche behavior. Measurements of velocities, impact pressures and observations of flow patterns around a 15 m high and 75 m long earthfill dam, have been ... -
Finite element modeling of snow-pack lying on a slope, considering snow as isotropic compressible viscoplastic media
(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 ... -
Forcasting snow avalanche days from meteorological data using classification trees; Grasdalen, Western Norway
(The International Snow Science Workshop (ISSW) Proceedings;, Chapter, 2006)Avalanches pose one of the most serious problems to infrastructure and people in the mountains in Norway. Processes leading to avalanche release are deterministic but the time and place of avalanche release is notoriously ... -
Forecast of avalanche danger for the intracontinental regions of Northeast of Eurasia
(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 ... -
Forecasting snow avalanche days from meteorological data using classification trees, Grasdalen, Western Norway.
(The International Snow Science Workshop (ISSW) Proceedings;, Chapter, 2006)Avalanches pose one of the most serious problems to infrastructure and people in the mountains in Norway. Processes leading to avalanche release are deterministic but the time and place of avalanche release is notoriously ... -
The general structure analysis of avalanche (mudflow) risk assessment
(NGI Publication;203, Chapter, 1998)The basic structure of risk assessment is studied. The general form of the assessment formula consists of three components - temporal, spatial and anthropogenic ones. The role and contribution of these components are ... -
Geomorphologic and geobotanical features of slushflows (Khibiny mountains instance)
(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 ... -
Icelandic avalanche run out models compared with topographical models used in other countries
(NGI Publication;203, Chapter, 1998)A statistical topographical model for the computation of runout for snow avalanches in Iceland has been derived from a recently assembled data sel of long Icelandic snow avalanches. The avalanches are from hills above towns ... -
Integrated database for rapid mass movements in Norway
(The International Snow Science Workshop (ISSW) Proceedings;, Chapter, 2006)Rapid mass movements include all kinds of slides in geological material, snow or ice. Traditionally, information about such events is collected separately in different databases covering selected geographical regions and ... -
Integrated database for rapid mass movements in Norway.
(The International Snow Science Workshop (ISSW) Proceedings;, Chapter, 2006)Rapid mass movements include all kinds of slides in geological material, snow or ice. Traditionally, information about such events is collected separately in different databases covering selected geographical regions and ... -
Long-term forecasting of changes of snowiness and avalanche activity in the world due to global warming
(NGI Publication;203, Chapter, 1998)The technique of definition of depth of the snow cover, number of days with the snow cover, number of days with intensive snowfalls, duration of avalanche prone period by the standard meteorological data (precipitation and ... -
The meteorological condition for larger avalanches at Senjojiki Bowl in Japanese Central Alps
(NGI Publication;203, Chapter, 1998)The Senjojiki Bowl has a typical avalanche terrain consisting of8 avalanche tracks. During the last 25 years 16 alpinists and ropeway workers in total have been killed by avalanches. Since no reliable avalanche warning is ... -
Models for powder snow avalanches : comparison of two approaches
(NGI Publication;203, Chapter, 1998)Two models are considered in this paper: one was proposed in Kulikovskiy and Sveshnikova (1977) and is referred here as KS-model, the second was described in Beghin and Brugnot (1983), and is referred here as BB-mode!. ... -
A new concept for avalanche warning in Switzerland
(NGI Publication;203, Chapter, 1998)During the past 60 years the Swiss Federal Institut for Snow and Avalanche Research (SLF), which is in charge of the avalanche warning in Switzerland issued national avalanche bulletins three to four times a week at around ... -
On avalanche measurements at the Norwegian full-scale test-site Ryggfonn.
(The International Snow Science Workshop (ISSW) Proceedings;, Chapter, 2008)Avalanche measurements and observations, which were carried out at the Ryggfonn test-site, Norway, on 16 April 2005, are analyzed. The data include pulsed Doppler radar measurements, impact pressure readings from load cells ... -
On avalanche run-up heights on deflecting dams: Centre of mass computations compared to observations.
(NGI Publication;203, Chapter, 1998)This article reports on the observed run-up heights of avalanches in terrain formations that act as "natural deflecting dams" with oblique angle of incidence. To compensate for the deficiencies of today's methods, the ...