Blar i NGI articles på dokumenttype "Chapter"

Viser treff 261-275 av 275

    • 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 ...

    • Use of the free fall cone penetrometer (FF-CPTU) in offshore landslide hazard assessment 

      L'Heureux, Jean-Sébastien; Vanneste, Maarten; Kopf, A.; Long, M. (Chapter, 2018)
      Free fall penetrometer (FF-CPTU) testing can provide significant advantages over conventional CPTU investigation for shallow sub-surface offshore site investigations. Much work has been done on soil characterisation and ...

    • Use of Vegetation for Landslide Risk Mitigation 

      Kalsnes, Bjørn; Capobianco, Vittoria (Chapter, 2022)

    • Using local monitoring data for regional forecasting of weather-induced landslides in Norway 

      Pecoraro, Gaetano; Calvello, Michele; Cepeda, Jose (Chapter, 2019)
      Since 2013, a national early warning system addressing weather-induced landslides in soils is operational in Norway. The system is based on real-time hydro-meteorological measurements used as input to a spatially distributed ...

    • Using of GIS technology for avalanche hazard mapping, scale 1:10 000 

      Pertziger, Felix (NGI Publication;203, Chapter, 1998)
      The sites with the size of 50·50 m2 having a various probability of avalanche formation were revealed for a given territory covering an area of 3·4 km2. Crossclassification of sites considering their slopes and snow cover ...

    • Utfordringer med svarte leirskifere; mellomlagring og naturlige blandmasser 

      Wærsted, Frøydis Meen; Fjermestad, Halldis; Totland, Christian; Børresen, Marion; Slinde, Gøril Aasen; Hansen, Caroline Berge; Tønnessen, Elisabeth; Hagelia, Per; Erstad, Lars; Baardvik, Gunvor (Chapter, 2022)
      Det er planlagt flere store byggeprosjekt i Oslo-regionen de neste årene. Dette vil resultere i utgraving av potensielt syredannende svart leirskifer i volumer som er større enn kapasiteten til godkjente deponier. NGI har ...

    • Überlegungen zur Designlawine von Lawinendämmen 

      Gauer, Peter (Chapter, 2023)

    • Vane Shear Strength in Terms of Effective Stresses 

      Aas, Gunnar; Lacasse, Suzanne (NGI Publication;209, Chapter, 2022)
      Experience with the shear strength determined with the field vane has shown that the measured values of the strength, normalized with the effective overburden stress, suv/σ'vo, are often lower than 0.1 for normally ...

    • Variable rate of penetration and dissipation test results in a natural silty soil 

      Carroll, Roselyn; Paniagua Lopez, Ana Priscilla (Chapter, 2018)
      Variable rate of penetration over 1.2 to 1.5 m intervals were carried out in a natural clayey silt followed by dissipation tests. The tests are grouped into two main sets: an upper set from 5 to 6.5 m and a deeper set from ...

    • Verification of avalanche bulletins by questionnaires 

      Brabec, Bernhard; Stucki, Thomas (NGI Publication;203, Chapter, 1998)
      The paper describes how avalanche bulletins (regional and national) are being verified by means of questionnaires in Switzerland. At the beginning of winter 1996/97 a set of four questionnaires has been introduced: • ...

    • Vulnerability of houses and persons under avalanche impact – the avalanche at Longyearbyen on 2015-12-19 

      Issler, Dieter; Jónsson, Árni; Gauer, Peter; Domaas, Ulrik (The International Snow Science Workshop (ISSW) Proceedings;, Chapter, 2016)
      This study uses data from the avalanche that killed two persons and destroyed eleven essentially identical wood-frame houses in Longyearbyen, Svalbard, on 2015-12-19. The avalanche is back-calculated with a dynamical model ...

    • Waterproof sprayed concrete with improved sustainability performance 

      Sjøbakk-Moe, Eivind; Holter, Karl Gunnar; Strømsvik, Helene (Chapter, 2023)

    • 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. ...

    • Yield Stresses in Soft Contracting Clays 

      Aas, Gunnar; Lacasse, Suzanne (NGI Publication;209, Chapter, 2022)
      The undrained shear strength su along an arbitrary failure plane can be expressed as: su = 1/2(σ'ULS − σ'LLS) (1) where σ'ULS and σ'LLS denote the upper (U) and lower (L) effective, normal, compressive failure stresses ...

    • Økt skredfare kan avverges 

      Jaedicke, Christian; Isaksen, Ketil; Sletten, Kari; Kronholm, Kalle (Klima;1-2009, Chapter, 2009)
      Klimaendringer gir villere vær, mer nedbør og flere skredhendelser i deler av Norge. Men dette trenger ikke føre til flere dødsfall og økte materielle skader, hvis vi bruker sunn fornuft og følger bygningsloven.