Blar i NGI articles på emneord "Avalanche-RnD"
Viser treff 1-20 av 260
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3D modelisation of snow slabs stability.
(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 ... -
Accoustic snow drift measurements: Experiences from the FlowCapt instrument
(Journal article, 2001)Three acoustic FlowCapt™ (IAV Engineering) drifting snow instruments were deployed during the 1999 and 2000 field season on Spitsbergen, Norway. Three different experiments were carried out to test the instruments for their ... -
Acoustic sensor to measure snowdrift and wind velocity for avalanche forecasting
(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). ... -
All-weather avalanche activity monitoring from space?
(The International Snow Science Workshop (ISSW) Proceedings;, Chapter, 2014)Information on avalanche activity or on non-activity on local and regional scale is of great value for avalanche warning services, traffic authorities and experts responsible for safety in communities or ski resorts. In ... -
Analysis of an artificially triggered avalanche at the nepheline syenite mine on Stjernøya, Alta, Northern Norway
(The International Snow Science Workshop (ISSW) Proceedings;, Chapter, 2014)Since 1961, a Nepheline Syenite mine is operated on the island of Stjernøya in the Altafjord, Northern Norway. The facilities are located in Lillebukt, on the southern side of the island. Above the facilities, the Nabbaren ... -
Analysis of avalanche measurements out of the runout area of NGI's full-scale test-site Ryggfonn
(Journal article, 2009)The paper summarizes measurements and observations of dry-snow avalanches at the Ryggfonn test-site with respect to their behavior in the runout area. Measurements of front velocities and retarding accelerations are presented ... -
Anvendelse av risikoanalyse i skredfarevurderingen
(Chapter, 1979)Trange dalfører og bratte fjellsider er svært vanlig i vart land og i fjord~ og dalstrøkene,særlig pa Vestlandet og i Nord-Norge er naturødeleggelse i form av skred en realitet. I mange dalfører er f.eks gärdsbebyggelsen ... -
Assessing the risk posed by natural hazards to infrastructures
(Peer reviewed; Journal article, 2017)This paper proposes a model for assessing the risk posed by natural hazards to infrastructures, with a focus on the indirect losses and loss of stability for the population relying on the infrastructure. The model prescribes ... -
Associations between shear strength of a buried surface hoar layer and stratigraphic, topographic and vegetation characteristics on a uniform slope. Extended abstract
(The International Snow Science Workshop (ISSW) Proceedings;, Chapter, 2006)In this study we quantify 1) changes in spatial and aspatial characteristics of the shear strength of a buried surface hoar layer, and 2) identify characteristics in terrain, vegetation and snow stratigraphy that can help ... -
Automated Avalanche Deposit Mapping From VHR Optical Imagery
(The International Snow Science Workshop (ISSW) Proceedings;, Chapter, 2012)Using eCognition we developed an algorithm to automatically detect and map avalanche deposits in Very High Resolution (VHR) optical remote sensing imagery acquired from satellites and airplanes. The algorithm relies on a ... -
The avalanche accident at Vassdalen, Norway, 5th March 1986
(Journal article, 1988)Shortly after 1300 hrs on wednesday March 5, 1986, a snow avalanche released from Storebalak, a mountain located at Vassdalen in Nordland county. The avalanche struck 31 men from the North Norway Brigade while they were ... -
The avalanche at Flateyri, Iceland October 26th 1995 and the avalanche history
(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
(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 characterization for regional forecasting
(The International Snow Science Workshop (ISSW) Proceedings;, Chapter, 2008)In the Sunnmøre and Romsdal road districts in Western Norway, the local road authorities have compiled a register of more than 300 sites where avalanches encounter principal roads in the area. The area covered is about 5 ... -
Avalanche control measures for roads in Norway
(Chapter, 1994)In a mountainous country like Norway the roads are exposed to different kind of natural hazards. Increasing traffic and extensive road-building programs the latest 25 years have made the society dependent on a relatively ... -
Avalanche debris detection using satellite-borne radar and optical remote sensing
(The International Snow Science Workshop (ISSW) Proceedings;, Chapter, 2014)The mountainous fjord landscape around Tromsø in Northern Norway is prone to high avalanche activity during the snow season. Large avalanches pose a hazard to infrastructure, such as buildings and roads, located between ... -
Avalanche defences for Flateyri, Iceland. From hazard evaluation to construction of defences.
(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 and risk mitigation for specific objects at risk
(The International Snow Science Workshop (ISSW) Proceedings;, Chapter, 2013)Objects and individuals can be exposed to different levels of avalanche hazard. For objectspecific avalanche forecasting and risk mitigation programs, the general danger scales, such as the European and North American ... -
Avalanche forecasting for transportation corridor and backcountry in Glacier National Park (BC, Canada)
(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 ...