Blar i Norwegian Geotechnical Institute (NGI) Digital Archive på forfatter "Breien, Hedda"

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    • Avalanche forecasting and risk mitigation for specific objects at risk 

      Kristensen, Krister; Breien, Hedda; Lacasse, Suzanne (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 ...

    • Befaringsnotat Grandefonna, Geiranger 

      Breien, Hedda (NGI-rapport;20170131-14-TN, Research report, 2020-06-26)
      Grandefonna i Geiranger gikk 17. januar 2019 etter en periode med stort snøfall (NV-situasjon) og stengte vegen. I løpet av 3-5 dager i midten av januar kom det omkring 70-100 cm snø i området. Det var ikke spesielt mye ...

    • Effect of high elevation birch forest on snow stability 

      Breien, Hedda; Høydal, Øyvind A. (The International Snow Science Workshop (ISSW) Proceedings;, Chapter, 2013)
      Forest and especially evergreen conifers like pine and spruce are known to reduce avalanche formation due to their physical anchoring effect and their influence on snow pack layering through changed temperature, radiation, ...

    • 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 ...

    • Submarine landslides and the importance of the initial sediment composition for run-out length and final deposit 

      Elverhøi, Anders; Breien, Hedda; De Blasio, Fabio V; Harbitz, Carl Bonnevie; Pagliardi, M. (Journal article, 2010)
      Much remains to understand the dynamic processes during the flow of submarine landslides. A first relevant problem is to explain the extraordinary mobility of submarine landslides, which has no comparison in subaerial mass ...

    • The upgraded full-scale avalanche test-site Ryggfonn, Norway. 

      Gauer, Peter; Breien, Hedda; Issler, Dieter; Kristensen, Krister; Kronholm, Kalle; Lied, Erik; Lied, Karstein (The International Snow Science Workshop (ISSW) Proceedings;, Chapter, 2010)
      Measurements of full-scale avalanches are expensive and time consuming, but are indispensable to gain in-depth understanding of the flow behavior of avalanches. They are needed to crosscheck the scaling used in small-scale ...

    • Use of Daisybell and Snow Profiles to Investigate the Effect of Alpine Birch on Avalanche Release 

      Breien, Hedda; Høydal, Øyvind A.; Almgren, Oscar M. (The International Snow Science Workshop (ISSW) Proceedings;, Chapter, 2014)
      Through a field study in Abisko, northern Sweden, we have used the artificial avalanche release system DaisyBell together with snow profiles to study the effect of alpine birch forest on avalanche formation. Evergreen ...