NGI report: Nye registreringer

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    • Annual Report 2019 [SP4 FoU Snøskred] 

      Issler, Dieter; Gauer, Peter; Glimsdal, Sylfest; Jaedicke, Christian; Sandersen, Frode; Gisnås, Kjersti (NGI-rapport;20170131-17-R, Research report, 2020-05-28)
      NGI has conducted research on avalanches and related processes since 1973. This report gives a short insight in the work done in 2019. While experiments with artificial release of avalanches in the Ryggfonn experimental ...

    • Annual Report 2018 [SP 4 FoU Snøskred] 

      Issler, Dieter; Gauer, Peter; Glimsdal, Sylfest; Jaedicke, Christian; Sandersen, Frode (NGI-rapport;20170131-11-R, Research report, 2018-12-21)
      In the second year of the present three-year project period, core and/or long-term activities were continued: -experiments at Ryggfonn and maintenance of the site, -infrasound monitoring along State Road 15 between Fonnbu ...

    • Annual Report 2017 [SP 4 FoU Snøskred] 

      Issler, Dieter; Gauer, Peter; Gisnås, Kjersti; Glimsdal, Sylfest; Jaedicke, Christian; Sandersen, Frode (NGI-rapport;20170131-05-R, Research report, 2018-01-12)
      During the first year of the project period 2017–2019 of NGI's research project on snow avalanches, work was carried out in all five work packages (WP 1 – Ryggfonn and model development, WP 2 – Statistical tools, WP 3 – ...

    • Field Survey of the 2017 Rigopiano Avalanche 

      Issler, Dieter (NGI-rapport;20170131-02-TN, Research report, 2019-12-26)
      In the evening of January 18, 2017, a large snow avalanche descended from the east flank of Monte Siella in the municipality of Farindola in the Abruzzo region of Italy. It completely destroyed the Hotel Rigopiano and ...

    • Dynamical Aspects of the 2017 Rigopiano Avalanch 

      Issler, Dieter (NGI-rapport;20170131-08-TN, Research report, 2019-01-21)
      Abstract: Data on the disastrous snow avalanche that occurred on 2017-01-18 at the spa hotel Rigopiano, municipality of Farindola in the Abruzzo region of central Italy, are analyzed in the present Technical Note in different ...

    • Estimating Avalanche Triggering Probability using meteorological and local terrain parameters through a fuzzy inference approach 

      Ragulina, Galina; Uzielli, Marco (NGI-rapport;20170131-12-TN, Research report, 2019-04-23)
      The aim of the present study is the quantitative estimation of snow avalanche triggering probability (ATP) for daily local forecasting purposes based on meteorological and local terrain factors. At present, ATP is indirectly ...

    • Snøskyskredmodell SL-1D – Grunnleggende ligninger og korrektur-faktorer 

      Issler, Dieter (NGI-rapport;20170131-06-TN, Research report, 2017-12-22)
      For tiden mangler det en beregningsmodell for snøskyskred som er like raskt og enkelt å bruke som f.eks. modellene RAMMS eller MoT-Voellmy for den tette delen av snøskred. I rådgivningsoppdrag brukes det derfor av og til ...

    • 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 ...

    • Snøskredulykke i Tamokdalen 2019-01-02 

      Sandersen, Frode (Research report, 2019-05-29)
      Fire utenlandske skituristerutløste et snøskred på topptur i Tamokdalen. Alle de fire omkom. Notatet beskriver skredfaglige faktorer.

    • Review of meteorological data from Fonnbu 2009–2016 

      Ragulina, Galina (NGI-rapport;20140053-05-TN, Research report, 2017-01-25)
      12 observed parameters are recalculated with a time step of 1 hour from the original raw data set of observed values with 10 minute time step. To form winter season data sets which would cover complete snow season, it was ...

    • 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) - ...

    • Notes on the Fluidization of Snow Avalanches by Air Expulsion from the Snow Cover 

      Issler, Dieter (NGI-rapport;20140053-03-TN, Research report, 2017-02-03)
      A recently proposed mechanism for fluidization of the front of dry-snow avalanches, based on air escaping from the snow cover that is compressed under the weight of the avalanche (Issler, 2013) is discussed.

    • Snø og snøskred vinteren 1980-81. Rapport fra snøforskningsstasjonen, Grasdalen, Stryn 

      Kristensen, Krister; Bakkehøi, Steinar (NGI-rapport;58000-04, Research report, 1982-10-21)
      Denne rapporten gir en oversikt over forskningsaktiviteten ved Fonnbu vinteren 1980/81. Vær- og snøforhold samt skredaktivitet i Grasdalen blir beskrevet. Rapporten gir også en kort omtale av de alvorligste snøskredulykkene ...

    • Environmental impact assessments of geotechnical works 

      Størdal, Ingvild; Ritter, Stefan; Tann, Loretta von der (NGI-rapport;20200436-12-R, Research report, 2023-08-14)
      One of the major contributors to global carbon emissions is the construction sector. Using world environmental input-output tables from 2009, the total CO2-emissions from the global construction sector was calculated to ...

    • 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 ...

    • Container experiments yearly report 2022 

      Wærsted, Frøydis Meen; Hansen, Caroline Berge; Dublet-Adli, Gabrielle; Fjermestad, Halldis; Hagelia, Per (NGI-rapport;20200436-10-R, Research report, 2023-07-07)
      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 ...

    • Måling av injeksjonsresultat med vanntapsmålinger i tunnel 

      Stein, Eivind (NGI-rapport;20200436-05-R, Research report, 2022-12-23)
      Forsøk ved Fornebubanens hovedtunnel har demonstrert at vanntapsmålinger ved stuff kan gjøres enkelt og effektivt, med bruk av lett utstyr. Vanntapsmålingene viser lavt vanntap og meget tett bergmasse etter 2-stegs injeksjon ...

    • 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 ...