Browsing Norges Geotekniske Institutt by Subject "Avalanche-RnD"
Now showing items 81-100 of 382
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Conclusions on the current status on avalanche modelling
(Chapter, 1999)An examination of existing models shows that: (1) there is not - and probably never will be - a single model that adequately describes all avalanche types; (2) in order to account for the extraordinary variability of ... -
Considerations on scaling behavior in avalanche flow along cycloidal and parabolic tracks
(Peer reviewed; Journal article, 2018)A simple scaling analysis using a simple mass block model supports observations and measurements on snow avalanches, that the maximum front-velocity of “major” avalanches scales with the total drop height of the track. ... -
Considerations on scaling behavior in avalanche flow: Implementation in a simple mass block model
(Peer reviewed; Journal article, 2020)Observations of runout distances combined with velocity measurements suggest that “major” dry-mixed avalanches show a scale invariance to the total drop height HSC. This is in accordance to the proposed upper-limit envelope ... -
Constraints on Entrainment and Deposition Models in Avalanche Simulations from High-Resolution Radar Data
(Peer reviewed; Journal article, 2019)Depth-integrated simulations of snow avalanches have become a central part of risk analysis and mitigation. However, the common practice of applying different model parameters to mimic different avalanches is unsatisfying. ... -
A contribution to the prediction of slush avalanches
(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 ... -
Could retrieval of snow layer formation by optical satellite remote sensing help avalanche forecasting? Presentation of first results
(The International Snow Science Workshop (ISSW) Proceedings;, Chapter, 2008)Of special interest within the field of avalanche research and avalanche warning are properties related to snow grain type and snow grain size at the surface. In continental and intermountain avalanche climates weak layers ... -
Could retrieval of snow layer formation by optical satellite remote sensing help avalanche forecasting? Presentation of first results.
(The International Snow Science Workshop (ISSW) Proceedings;, Chapter, 2009)Of special interest within the field of avalanche research and avalanche warning are properties related to snow grain type and snow grain size at the surface. In continental and intermountain avalanche climates weak layers ... -
CPT 3 – Quantitative risk assessment: Remarks on the uncertainty in the delimitation of hazard zones based on historical observations
(NGI-Rapport;20200017-09-TN, Research report, 2022-03-22)The Norwegian building code regulates the societal acceptable risk from avalanches for three building classes (S1, S1, and S3). The corresponding highest allowed nominal annual probabilities of avalanches reaching the ... -
Cross-comparison of Selected Avalanche Observations
(Chapter, 2019)In many mountainous regions, snow avalanches are severe threats to the population and their infrastructure. Delineation of avalanche endangered areas or the design of suffcient mitigation measures require in-depth understanding ... -
Dam Tunsbergdalsvatn. A dam subjected to waves generated by avalanches, and to extreme floods from a glacier lake
(Chapter, 1976)The construction of Leirdøla power plant was started in 1975 and will be completed in 1978. The owner is the Norwegian Water Resources and Electricity Board. The power plant is situated in Western Norway, close to ... -
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 Alternatives for a Tool for Probabilistic Run-Out Calculations With MoT-Voellmy
(NGI-rapport;20170131-10-TN, Research report, 2018-12-11)As part of WP 2 – Analyses of the joint Natural Hazards GBV project HARM1 (project number 20180069), it was decided to develop a tool for carrying out probabilistic runout calculations. This task was later moved to FoU ... -
Design criteria and location of snow fences
(Journal article, 1985)The paper describes experience gained in Norway regarding the design criteria and use in practice of snow fences . The paper is based on theoretical studies on drifting snow, model experiments and experience accumulated ... -
Design criteria for cylindrical masts exposed to snow creep forces.
(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 design of avalanche protection dams. Recent practical and theoretical developments
(Lecture, 2008)Recent experimental and theoretical studies of the flow of avalanches against obstructions have been used, in combination with traditional design guidelines, to formulate recommendations for the design of dams and other ... -
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 ... -
Detaljer og forandringer i forbindelse med datainnsamlingssystemet i Ryggfonn 83/84
(NGI-rapport;58120 Notat 1983-06-27, Research report, 1984) -
Detaljer og forandringer i forbindelse med feltinstrumentering i Ryggfonn sesong 1990/91
(NGI-rapport;58120 Notat 1991-01-15, Research report, 1991-01-15)Detaljer og forandringer i forbindelse med feltinstrumentering i Ryggfonn sesong 1990/91 -
Determinación de la velocidad de avalanchas de nieve mediante datos sísmicos
(Chapter, 2006)Seismic instrumentation has proved to be a reliable tool for snow avalanche detection. In this approach, besides the detection skills of our system we pretend to go one step further. We aim to infer a physical parameter ... -
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 ...