Browsing Norwegian Geotechnical Institute (NGI) Digital Archive by Subject "Snow Avalanche"
Now showing items 61-80 of 106
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Operational use of a snowpack model for the avalanche warning service in Switzerland : model development and first experiences
(NGI Publication;203, Chapter, 1998)The national Swiss avalanche warning service must provide high quality avalanche danger forecasts with an increasing spatial resolution. For this purpose, forecasters require objective tools to judge local and regional ... -
Opportunity of detailing avalanche forecasts
(NGI Publication;203, Chapter, 1998)The national Swiss avalanche warning service must provide high quality avalanche danger forecasts with an increasing spatial resolution. For this purpose, forecasters require objective tools to judge local and regional ... -
An overview of avalanche forecasting models and methods
(NGI Publication;203, Chapter, 1998)This overview resumes first the historical development of avalanche forecasting in different countries of the world. It yields the most basic definitions like "avalanche danger" and presents the major problems of avalanche ... -
An overview of natural hazard zoning with special reference to avalanches
(NGI Publication;203, Chapter, 1998)Natural hazards are increasingly a limiting factor in mountainous countries in connection with the growing population and economical development. People become more and more estranged to environmental conditions and are ... -
PANDALP : a new penetrometer for snow investigation
(NGI Publication;203, Chapter, 1998)This paper presents a new tool for snow investigation, issued from a portable dynamic penetrometer Panda with variable energy for soil investigation. After a brief presentation of this apparatus, a comparable study between ... -
Permafrost response to environmental and industrial loads. Snø og snøskred på Svalbard. Registrering av snøforhold, snøskred og utløpslengder
(NGI-rapport;58910-04, Research report, 1999-12-30)Det er behov for forskning på snø og skred i arktiske områder for å kunne gi faglig verifiserte råd i forbindelse med utvikling og bruk av områdene. Problemstillinger og erfaringer fra ca 25 konsulentoppdrag på Svalbard ... -
The potential of sedimentology and stratigraphy in avalanche-hazard research
(NGI Publication;203, Chapter, 1998)Detailed sedimentology studies in cross sections and studies of recent processes on avalanche-dominated colluvial fans have been combined in order to evaluate the characteristic sedimentary facies of avalanche processes. ... -
Quantitative risk analysis for evaluation of avalanche protection projects
(NGI Publication;203, Chapter, 1998)Questions on optimum protection measures have always been bound to economic considerations. This involves a comprehensive investigation and analysis of the effect of avalanche protection measures with an appropriate concept ... -
Radar measurements of snow avalanche full scale experiment in Ryggfonn.
(NGI Publication;203, Chapter, 1998)At the full scale experiment site of NG! in Ryggfonn, avalanche velocities and forces have been measured through 15 years. In April 1997 an Austrian developed INW pulsed Doppler radar was used to measure avalanche velocities ... -
Reinunga, Aurland. Snøskredulykke 3. mars 2004
(NGI-rapport;20041154-01, Research report, 2004-03-26)A derivation is given for the equation of thermodynamic equilibrium between ice and water in porous media. The equation accounts for a difference between the pressure of the ice phase and the total potential (in pressure ... -
Review of spatial variability of snowpack properties and its importance for avalanche formation.
(Journal article, 2008)The seasonal snow cover is spatially variable. Spatial variability of layer properties is due to various external and internal process drivers interacting with terrain and ground cover during and after the deposition ... -
Risk analysis for landslides and snow avalanches. Example applications for snow avalanches
(NGI-rapport;522051-01, Research report, 1999-12-23)Prediction of snow avalanche occurrence and its run-out distance inherently involves many uncertainties. The main reason for the large uncertainties is that the mechanical behaviour of snow is extremely complicated, and ... -
Rock-avalanche hazard in Møre & Romsdal, western Norway
(NGI Publication;203, Chapter, 1998)Flood waves generated by large rock avalanches have caused major disasters in Norway. Many of these events are restricted to a relatively limited zone in the counties Møre & Romsdal and Sogn & Fjordane. Geological studies ... -
Rows of vertical steel-silos filled with debris - an effective space-saving avalanche defense structure.
(Chapter, 2002)Multiplate steel configurations, primarily used for road tunnels and culverts, are introduced as effective, flexible and space-saving avalanche defence structures. Silos of specified height and profile are filled with ... -
Ryggfonn - Options for reconstruction of the test site. Deliverable of the NFR-Snow research programme SIP-6
(NGI-rapport;58120-34, Research report, 2001-01-31)Norges Forskningsråd (NFR) -
The Ryggfonn project. Avalanche data from the winters 1994/95 and 1995/96
(NGI-rapport;58120-32, Research report, 1997-12-20)This report presents data collected from the full-scale Ryggfonn project during the winters 1994/95 and 1995/95. Only four avalanches were observed in the course of these two winters, three of which were naturally released ... -
Safran/Crocus/Mepra models as an helping tool for avalanche forecasters
(NGI Publication;203, Chapter, 1998)To describe the great variability of the snow pack and to predict the avalanche risk in the French Alps and Pyrenees massifs, the «Centre d'Etudes de la Neige» (C.E.N.) of METEO-FRANCE has developed an automatic chain of ... -
Shear stresses and boundary layers in snow avalanches
(NGI-rapport;581240-03, Research report, 1995-10-20)Full-scale experiments on snow avalanches have shown that the major part ofthe avalanches are mixed flow avalanches, and that they consist of at least two parts, a dense flow part and a turbidity part. The report is based ... -
Sheet pile walls - a space-saving avalanche defense structure.
(The International Snow Science Workshop (ISSW) Proceedings;, Chapter, 2006)Steel sheet piles, primarily used as retaining walls when excavating soft ground and for stabilizing fills, are introduced as flexible components for a variety of effective and space-saving avalanche defense structures. ... -
A short comparison between Voellmy-fluid and Criminale-Ericksen-Filby-fluid dense snow avalanche models
(NGI Publication;203, Chapter, 1998)In the publications Norem et al. (1987) and Norem et al. (1989) a dense snow avalanche model is proposed that uses a Criminale-Ericksen-Filby constitutive relation with power law viscosity functions. A vertical velocity ...