Blar i NGI articles på forfatter "Sandersen, Frode"

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    • Observations of the dynamic structure of snow avalanches 

      Nishimura, K.; Maeno, N.; Kristensen, Krister; Sandersen, Frode; Norem, Harald; Lied, Karstein (Journal article, 1993)
      During two winters, 1990–92, the dynamic structures of snow avalanches were studied in western Norway. Artificially released wet-snow avalanches ran down the avalanche chute and stopped in front of the retaining dam. Running ...

    • On snow avalanche flow regimes: Inferences from observations and measurements. 

      Gauer, Peter; Issler, Dieter; Lied, Karstein; Kristensen, Krister; Sandersen, Frode (The International Snow Science Workshop (ISSW) Proceedings;, Chapter, 2008)
      Mixed dry-snow avalanches are commonly thought to consist of a dense core and a dilute suspension layer, even though observations and measurements from Canada and Russia have long indicated the presence of an intermediate-density ...

    • An overview of the need for avalanche protection measures in Iceland 

      Johannesson, Tomas; Lied, Karstein; Margreth, Stefan; Sandersen, Frode (Iceland. Ministry for the Environment;VI-R96004-UR03, Report, 1996)
      The present report is prepared by the Icelandic Meteorological Office for the Icelandic Ministry for thc Environment and Iocal authorities in towns threatened by avalanches....

    • Regional avalanche warning in Norway, a new concept for a large country 

      Jaedicke, Christian; Bakkehøi, Steinar; Sandersen, Frode; Brattlien, Kjetil; Solheim, Anders (The International Snow Science Workshop (ISSW) Proceedings;, Chapter, 2008)
      Norway encompasses 324 000 km2 of land area of which ca. 7 % are mountainsides steeper than 30 degrees. The country extends approximately 1700 km from south to north and features extreme variations in normal precipitation ...

    • Sikringstiltak mot snø- og sørpeskred 

      Hestnes, Erik; Sandersen, Frode (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 ...

    • Slushflow hazard control. A review of mitigative measures. 

      Hestnes, Erik; Sandersen, Frode (NGI Publication;203, Chapter, 1998)
      Slushflow hazard detection and control are based on both active and passive mitigative measures performed above and within the starting zones as well as along the path and in the runout zone. The main aim of preventive ...

    • Snøskred trenger ikke komme som noen overraskelse 

      Sandersen, Frode (Journal article, 2000)
      Snøskred er kostbare hendelser, i form av tap av liv eller materielle skader. Mange steder i landet vårt er det topografiske og klimatiske forhold som gjør det naturlig at det oppstår skredfare. Faren kan normalt ikke ...

    • Weather and snowpack conditions essential to slushflow release and downslope propagation 

      Hestnes, Erik; Bakkehøi, Steinar; Sandersen, Frode (The International Snow Science Workshop (ISSW) Proceedings;, Chapter, 1994)
      Rapid mass movement of water-saturated snow, usually known as slushflow or slush avalanche, is a major natural hazard in Norway. Slushflows occur in winter during heavy rainfall, as well as due to intense thaw in spring. ...