Blar i Norwegian Geotechnical Institute (NGI) Digital Archive på tittel

Viser treff 1199-1218 av 1219

    • Waste timber pyrolysis in a medium-scale unit: Emission budgets and biochar quality 

      Sørmo, Erlend; Silvani, Ludovica; Thune, Gorm; Gerber, Helmut; Schmidt, Hans-Peter; Cornelissen, Gerard (Peer reviewed; Journal article, 2020)
      Pyrolysis of organic waste or woody materials yields a stable carbonaceous product that can be mixed into soil and is often termed “biochar”. During pyrolysis carbon-containing gases are emitted, mainly volatile organic ...

    • 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. ...

    • Weather stations in Norway suitable for SNOWPACK modelling in Norway in 2016 

      Ragulina, Galina (NGI-rapport;20140053-04-TN, Research report, 2017-01-23)
      A physical SNOWPACK model developed by Swiss Federal Institute for Snow and Avalanche Research, SLF, requires following meteorological observations as input data1 for the model simulations: - air temperature (TA) - ...

    • Weathering Plastics as a Planetary Boundary Threat: Exposure, Fate, and Hazards 

      Arp, Hans Peter; Kühnel, Dana; Rummel, Christoph; MacLeod, Matthew; Potthoff, Annegret; Reichelt, Sophia; Rojo-Nieto, Elisa; Schmitt-Jansen, Mechthild; Sonnenberg, Johanna; Toorman, Erik; Jahnke, Annika (Peer reviewed; Journal article, 2021)

    • Weight of evidence tools in the prediction of acute fish toxicity 

      Belanger, Scott E.; Lillicrap, Adam David; Moe, S. Jannicke; Wolf, Raoul; Connors, Kristin; Embry, Michelle R. (Peer reviewed; Journal article, 2022)
      Acute fish toxicity (AFT) is a key endpoint in nearly all regulatory implementations of environmental hazard assessments of chemicals globally. Although it is an early tier assay, the AFT assay is complex and uses many ...

    • Wetting-Drying Response of an Unsaturated Pyroclastic Soil Vegetated with Long-Root Grass 

      Capobianco, Vittoria; Cascini, Leonardo; Cuomo, Sabatino; Foresta, Vito (Peer reviewed; Journal article, 2020)
      This paper investigates the effect of a long-root grass on the hydraulic response of a partially saturated pyroclastic soil. The work is based on both long-term monitoring under atmospheric conditions and short-term ...

    • Wetting-induced collapse behaviour of a natural and vegetated coarse pyroclastic soil 

      Capobianco, Vittoria; Cascini, Laonardo; Cuomo, Sabatino; Foresta, Vito (Peer reviewed; Journal article, 2020)
      Unsaturated pyroclastic soils originated by Vesuvius volcano show a collapsible behaviour upon wetting with a significant reduction in volume and rearrangement of solid skeleton. The paper investigates the role played by ...

    • Wind simulations for use in local avalanche forecasting 

      Gisnås, Kjersti (NGI-rapport;20170131-19-TN, Research report, 2020-06-26)
      Quantification of release probabilities in local avalanche forecasting are depending on knowledge of historical weather characteristics as well as detailed knowledge of the wind driven snow distribution on a fine scale. ...

    • Wind-tunnel study of snowdrift around avalanche defence structures 

      Jaedicke, Christian; Naaim-Bouvet, Florence; Granig, Matthias (Journal article, 2004)
      Avalanche defence structures such as retarding dams and breaking mounds are widely used to protect residential areas and other kinds of infrastructure. The effect of the defence structures depends largely on their effective ...

    • WP 2 – Full-scale experiments at Ryggfonn Ryggfonn avalanche observations 2019/2020 

      Gauer, Peter; Langeland, Henrik (NGI-Rapport;20200017-05-TN, Research report, 2021-03-22)
      NGI is operating the avalanche test site at Ryggfonn in Stryn municipality, Vestland county, western Norway (61.969°N, 7.275°E) since early 1980s. In addition to the field work and data collection in frame work of WP2, ...

    • WP 2 – Full-scale experiments at Ryggfonn Ryggfonn avalanche observations 2020/2021 

      Gauer, Peter; Langeland, Henrik; Salazar, Sean; Kristensen, Krister (NGI-rapport;20200017-06-TN, Research report, 2022-04-07)
      NGI continues to operate the avalanche test site at Ryggfonn in Stryn municipality, Vestland county, western Norway (61.969°N, 7.275°E). In addition to the field work and data collection performed in the context of WP2 – ...

    • WP1 - Container experiments - Yearly report 2021 

      Wærsted, Frøydis Meen; Hansen, Caroline Berge Hansen; Fjermestad, Halldis; Hagelia, Per (NGI-rapport;20200436-09-R, Research report, 2023-05-08)
      Container experiments investigating leaching from alum shale under different conditions were started autumn 2020 as a part of the Under Oslo project at NGI (SP13). Furthermore, leaching from alum shale mixed with different ...

    • WP1 - Mixed fractions of black shale and rhomb porphyry 

      Totland, Christian (NGI-rapport;20200436-02-R, Research report, 2023-02-20)
      When taking out potentially acid-producing black shale in construction projects, rock masses are often unintentionally mixed with masses of other rocks. The acid-producing potential of such mixed masses is uncertain, and ...

    • WP1 - Rhomb porphyry - data report 

      Børresen, Marion (NGI-rapport;20200436-08-R, Research report, 2021-12-22)
      Samples of rhomb porphyry have been characterized with chemical analyses and different leaching experiments (column, container and standard leaching tests) to study their composition and leaching properties. Results ...

    • WP1 - Temporary storage of black shales – a compilation of case studies, experiences and overall conclusions 

      Wærsted, Frøydis Meen; Slinde, Gøril Aasen; Børresen, Marion (NGI-rapport;20200436-03-R, Research report, 2023-01-09)
      As a part of the internal R&D project "Under Oslo" at NGI, several aspects of temporary storage of black shale has been investigated. Information from different experiments and cases of black shale storage from the ...

    • 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 ...

    • Årsrapport [FoU Snøskred 2012] 

      Sandersen, Frode; Jaedicke, Christian; Domaas, Ulrik; Gauer, Peter; Kronholm, Kalle (NGI-rapport;20120031-01-R, Research report, 2013-02-01)
      Rapporten beskriver aktivitetene som er gjennomført i 2012 innenfor FoU prosjektet ”Snøskred” finansiert gjennom NVE. Prosjektet er delt inn i 4 hovedområder: - Modellering - Varsling - Sikringstiltak, herunder ...

    • 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.

    • Øysand research site: Geotechnical characterisation of deltaic sandy-silty soils 

      Quinteros, Santiago; Gundersen, Aleksander; L'Heureux, Jean-Sébastien; Carraro, Antonio H.; Jardine, Richard (NGI-rapport;20190154-09-R, Report, 2019-12-04)
      This paper describes the geology and geotechnical engineering properties of the fluvial and deltaic gravelly-sandy-silty sediments at Øysand, Norway. Geophysical and geotechnical site investigations carried out between ...