Browsing Norges Geotekniske Institutt by Subject "Avalanche-RnD"

Now showing items 161-180 of 382

    • Impacts of extreme weather events on transport infrastructure in Norway 

      Frauenfelder, Regula; Solheim, Anders; Isaksen, Ketil; Romstad, Bård; Dyrrdal, Anita Verpe; Ekseth, Kristine; Skaland, Reidunn Gangstø; Harbitz, Alf; Harbitz, Carl Bonnevie; Haugen, Jan Erik; Hygen, Hans Olav; Haakenstad, Hilde; Jaedicke, Christian; Jónsson, Árni; Klæboe, Ronny; Ludvigsen, Johanna; Meyer, Nele Kristin; Rauken, Trude; Sverdrup-Thygeson, Kjetil (Journal article, 2016)

    • In-Situ Estimates of the Tensile Strength of Snow Utilizing Large Sample Sizes 

      McClung, David (Journal article, 1979)
      Experimental procedure and measured estimates of the tensile strength of snow are given by a new method utilizing large sample sizes of naturally deposited snow. Data are presented as a function of average sample density, ...

    • Inferences on flow mechanisms from snow avalanche deposits 

      Issler, Dieter; Errera, Alessia; Priano, Stefano; Gubler, Hansueli; Teufen, Bernardo; Krummenacher, Bernhard (Journal article, 2008)
      The deposit structure of 20 very small to large avalanches that occurred in the Davos area, eastern Swiss Alps, during winters 2004/05 and 2005/06 was investigated. Snow-cover entrainment was significant in the majority ...

    • Inferences on Mixed Snow Avalanches from Field Observations 

      Issler, Dieter; Gauer, Peter; Schaer, Mark; Keller, Stefan (Peer reviewed; Journal article, 2019)
      Observations of the deposits, flow marks, and damages of three mixed-snow avalanches of widely different size were analyzed with regard to flow regimes, velocities, pressures, densities, flow depths, erosion modes, and ...

    • The influence of drifting snow on the location of glaciers on western Spitsbergen, Svalbard 

      Jaedicke, Christian; Gauer, Peter (Journal article, 2005)
      On western Spitsbergen, Svalbard, the amount of winter precipitation is insufficient to maintain the present-day mass balance of the local glaciers. Additional snow mass must be added to the precipitation to reach the ...

    • Influence of forest on snow avalanche hazard – norwegian challenges 

      Breien, Hedda; Høydal, Øyvind A. (The International Snow Science Workshop (ISSW) Proceedings;, Chapter, 2012)
      Forested areas are less prone to snow avalanches, due to the trees' influence on snow accumulation, snow pack layering, energy balance and the armoring effect of the trees. Crown cover, tree dimensions and forest density ...

    • Instruks for utførelse av triaksialforsøk på snø 

      Haugen, Yngvar (NGI-rapport;58101-02, Research report, 1978-01-01)

    • Integrated database for rapid mass movements in Norway 

      Jaedicke, Christian; Lied, Karstein; Juvet, Halvor; Kronholm, Kalle (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. 

      Jaedicke, Christian; Lied, Karstein; Juvet, Halvor; Kronholm, Kalle (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 ...

    • Integrating spatial patterns into a snow avalanche cellular automata model 

      Kronholm, Kalle; Birkeland, Karl W. (Journal article, 2005)
      Snow avalanches are a major mountain hazard that kills hundreds of people and causes millions of dollars in damage worldwide annually. Yet, the relationship between the well-documented spatial variability of the snowpack ...

    • Interplay of entrainment and rheology in snow avalanches: a numerical study 

      Issler, Dieter; Pérez, Manuel Pastor (Journal article, 2011)
      A one-dimensional evolution equation for the slope-normal velocity profile of a streamwise uniform avalanche over an entrainable bed is derived. The boundary conditions are no slip at the bed, a stress-free surface and ...

    • Kartlegging av snøskred- og steinsprang ved hjelp av EDB baserte metoder 

      Toppe, Ronald; Lied, Karstein (NGI-rapport;58930-03, Research report, 1984-12-15)
      For å unngå at boligfelt planlegges i skredfarlig terreng er det satt i gang kartlegging av områder utsatt for snøskred- og steinskredfare i Norge. Kartleggingen er basert på topografiske kart i målestokk 1:50.000. Disse ...

    • Kartlegging av snøskred- og steinsprangfare ved hjelp av EDB-baserte metoder 

      Toppe, Ronald; Lied, Karstein (Chapter, 1984)
      For å unngå at boligfelt planlegges i skredfarlig tcrreng er det satt igang kartlegging av områder utsatt for snøskred-og steinsprangfare i Norge. Kartleggingen er basert på topografiske kart og i målestokk l: 15 000. Disse ...

    • Klassifisering og kodesymboler for snø- og skredobservasjoner. 

      Bakkehøi, Steinar (NGI-rapport;58301 Notat 1973-11-12, Research report, 1973-11-12)
      Denne klassifiseringen er hovedsakelig hentet fra "The International Classification for Snow, Technical Memorandum No 31, NRC, Canada 1954". Det er gjort noen mindre forandringer, og der klassifiseringen kommer inn på ...

    • Klatrehøgder av skred på krumma leievoll 

      Moe, Arne (NGI-rapport;58120-36, Research report, 2002-01-15)
      I krumma skredkanalar vil sentrifugalkrefter lyfta skredmassen opp langs kanalveggen i yttersving. Dette hender avdi sentrifugalkreftene roterer den frie overflata med ein vinkel θ (definert i Formel 1, s. 6). Klatrehøgda ...

    • Laws of friction in snow mechanics 

      McClung, David M. (Chapter, 1976)
      Laws of sliding and friction are of primary importance in the determination of pre-fracture conditions for slab avalanches as well as for practical considerations such as determining snow pressure loads on constructions ...

    • Local avalanche warning in Europe 

      Jaedicke, Christian; Studeregger, Arnold; Monti, Fabiano; Dellavedova, Paola; Stoffel, Lukas; Azzarello, Sergio; Garcia, Carles; Molné, Toni; Bellido, Guillem Martín (Lecture, 2018)
      Avalanche exposed settlements, communication lines, ski resort operations, construction sites, tourism and professional guiding are only few examples of activities in the mountains where an active risk management requires ...

    • Long-term forecasting of changes of snowiness and avalanche activity in the world due to global warming 

      Glazovskaya, T.G.; Seliverstov, Yu. G. (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 ...

    • Longyearbyen, Svalbard - Vulnerability and risk management of an arctic settlement under changing climate - a challenge to authorities and experts 

      Hestnes, Erik; Bakkehøi, Steinar; Jaedicke, Christian (The International Snow Science Workshop (ISSW) Proceedings;, Chapter, 2016)
      Longyearbyen, the administrative centre of the Svalbard archipelago, is facing most types of natural hazards under a changing Arctic climate. The catastrophic avalanche in December 2015 led NGI to review our professional ...

    • Looking Beyond the Powder/Dense FlowAvalanche Dichotomy 

      Faug, Thierry; Turnbull, Barbara; Gauer, Peter (Journal article, 2018-03-04)
      Köhler et al. (2018, https://doi.org/10.1002/2017JF004375) deploy a high spatial and temporal resolution GEODAR radar system to reveal the inside of snow avalanches over the entire slope. They detect a rich variety of ...