Browsing Norges Geotekniske Institutt by Subject "Avalanche-RnD"
Now showing items 261-280 of 382
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The Ryggfonn project. Description of instrumentation and data registration system
(NGI-rapport;58120-03, Research report, 1983-06-10)The Ryggfonn avalanche path has been instrumented to measure: deflections on a 6 m high steel mast mounted at top of the test embankment by means of weldable strain gauges; wind speed of powder snow fronts by means of a ... -
Ryggfonn prosjektet. Målinger gjort under skred 23. april 1983
(NGI-rapport;58120 Notat 1983-06-27, Research report, 1983-06-27) -
"Safe haven" at road sides near avalanche prone sites
(The International Snow Science Workshop (ISSW) Proceedings;, Chapter, 2008)Snow avalanches cause threat to road traffic in mountainous areas in Iceland in wintertime. One or more vehicles are hit by avalanches every year but last year’s no fatal accidents due to snow avalanches have been reported. ... -
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 ... -
Secondary Impacts of Climate Change on the Cryosphere - Chapter 5.1. Avalanches
(ETC/ACC Technical Paper;2010/13, Chapter, 2010)Key messages: • Average avalanche activity has not changed during the last decade, and climate change will only affect the lower altitudes • The event history of avalanches is extremely difficult to relate to climate ... -
Seismic location and tracking of snow avalanches and slush flows on Mt. Fuji, Japan
(Peer reviewed; Journal article, 2019)Avalanches are often released at the dormant stratovolcano Mt. Fuji, which is the highest mountain of Japan (3776 m a.s.l.). These avalanches exhibit different flow types from dry-snow avalanches in winter to slush flows ... -
Selected observations from avalanche measurements at the Ryggfonn test site and comparisons with observations from other locations
(The International Snow Science Workshop (ISSW) Proceedings;, Chapter, 2016)Selected observations from the full-scale avalanche test site Ryggfonn, Norway, like front velocity, runout distance, or pressure distributions, are presented and compared with observations from other locations. In this ... -
Sentrifuge til bestemmelse av strekkfasthet i snø
(NGI-rapport;58101-01, Research report, 1974-01-01)På snøforskningsstasjonen i Grasdalen var det behov for laboratorieutstyr til utforskning av snøens mekaniske egenskaper. Efter en studietur som undertegnede foretok til Snøforsknings instituttet på Weissfluhjoch ovenfor ... -
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 ... -
Significance of historical records for avalanche hazard zoning in Norway
(The International Snow Science Workshop (ISSW) Proceedings;, Chapter, 2000)In avalanche hazard zoning, it is common practice to investigate the previous avalanche history for the area considered. Historical observations of avalanches serve as an aid in the classification of the terrain, and may ... -
Sikringsmetoder mot snøskred
(Chapter, 1979)I store deler av landet vårt har vi omrader vi ønsker å utbygge, men hvor det samtidig er mulighet for snøskred. I de fIeste tilfellene der man er klar over snøskredfaren, unnlater man a føre opp bygninger. Der det allerede ... -
Sikringstiltak mot snø- og sørpeskred
(Byggforskserien - Planløsning;Sending 1, Chapter, 1995)Dette bladet behandler de vanligste tiltakene for å sikre bebyggelse mot snø- og sørpeskred. Hensikten med bladet er å gi en oversikt over mulige sikringsmetoder. Bladet gir ikke detaljerte data for prosjektering og ... -
A Simple Model for the Variability of Release Area Size
(NGI-Rapport;20200017‐03‐TN, Research report, 2023-08-24)The hazard mapping tool NAKSIN estimates the release probability of potential release areas (PRAs) by testing a stability criterion based on the infinite-slope approximation with a large sample of synthetic weather situations. ... -
Simulation of snow-avalanche flow in run-out zones.
(Journal article, 1989)The authors of this paper have previously, in 1987, outlined the development of a set of constitutive equations representing the behaviour of avalanching snow, and the resulting equations for fully developed steady shear ... -
Simulations of dense snow avalanches on deflecting dams
(NGI-rapport;58121-03, Research report, 1997-08-27)Two models simulating snow avalanches impacting retaining dams at oblique angles of incidence are presented. First a lumped mass model applying the Voellmy-Perla equation is used to calculate the path ofthe centre-of-mass ... -
Simulations of dense snow avalanches on deflecting dams
(Journal article, 1998)Two models simulating snow avalanches impacting retaining dams at oblique angles of incidence are presented. First, a lumped-mass model applying the Voellmy-Perla equation is used to calculate the path of the centre-of-mass ... -
SIP-6 snøskredforskning. Bruk av klimadatabaser for skredfareevaluering
(NGI-rapport;58810-23, Research report, 2002-01-29)Det er innhenta værdata fra 15 meteorologiske klimastasjoner i Norge. Disse dataene er behandla slik at de er relevante for vurdering av sannsynligheten for utløsning av snøskred. Det betyr at det er foretatt en glidende ... -
SIP6 snøskredforskning. Vær-, snø - og snøskred i Grasdalen. Vintrene 1994/1995 til 1999/2000
(NGI-rapport;20011001-05, Research report, 2001-10-29)Denne rapporten gir en oversikt over innsamlede vær-, snø- og snøskreddata fra skredforskningsstasjonen Fonnbu i Grasdalen på Strynefjellet. Oversikten omfatter vintrene 1994/1995, 1995/1996, 1996/1997, 1997/1998, 1999/2000.