Blar i Norwegian Geotechnical Institute (NGI) Digital Archive på forfatter "Domaas, Ulrik"

Viser treff 1-20 av 23

    • A GIS method for assessment of rock slide tsunami hazard in Norwegian lakes and reservoirs 

      Romstad, Bård; Harbitz, Carl Bonnevie; Domaas, Ulrik (Journal article, 2009)
      An evaluation of rock slide tsunami hazard is applied to all Norwegian lakes larger than 0.1 km2 based on their topographical setting. The analysis results in a topographic rock slide potential score that indicates the ...

    • Annual Report 2020 

      Gauer, Peter; Salazar, Sean; Robinson, Kate; Issler, Dieter; Frauenfelder, Regula; Langeland, Henrik; Liu, Zhongqiang; Domaas, Ulrik; Jaedicke, Christian; Gilbert, Graham (NGI-Rapport;20200017-02-R, Research report, 2021-03-19)
      During the first year of the project period 2020-2022 of NGIs research project on Snow avalanches, Applied Avalanche Research in Norway (AARN), work was conducted in all three work packages (WP 1 – Avalanche formation and ...

    • Avalanche debris detection using satellite-borne radar and optical remote sensing 

      Eckerstorfer, Markus; Malnes, Eirik; Frauenfelder, Regula; Domaas, Ulrik; Brattlien, Kjetil (The International Snow Science Workshop (ISSW) Proceedings;, Chapter, 2014)
      The mountainous fjord landscape around Tromsø in Northern Norway is prone to high avalanche activity during the snow season. Large avalanches pose a hazard to infrastructure, such as buildings and roads, located between ...

    • Avalanche run-out on counter-slopes 

      Moe, Arne; Bakkehøi, Steinar; Wieshofer, Sigrid; Domaas, Ulrik (Journal article, 2003)
      Counter-slopes in avalanche paths influence avalanche flow in similarways as defence structures. Measurements and calculations of run-outon such slopes will improve our understanding of retaining damdesign. We have studied ...

    • Avalanches in the context of climate change in the northern regions: Avalanche Protection - Visions 

      Domaas, Ulrik; Gisnås, Kjersti (Journal article, 2017)
      Avalanches have caused more than 1500 deaths the past 150 years in Norway. Development in rural areas make us more vulnerable to geohazards. Climatic warming with increased frequency and strength of extreme weather events ...

    • Back-calculations of observed avalanches against natural deflecting dams 

      Issler, Dieter; Harbitz, Carl Bonnevie; Domaas, Ulrik; Kronholm, Kalle; Christen, Marc (The International Snow Science Workshop (ISSW) Proceedings;, Chapter, 2012)
      The objective of this study is to assess the reliability of presently available numerical avalanche models in predicting avalanche flow about deflecting natural terrain features such as large boulders or moraine ridges. ...

    • Calculation of snow avalanche runout distance. 

      Bakkehøi, Steinar; Domaas, Ulrik; Lied, Karstein (Journal article, 1983)
      Evaluation of the maximum runout distance of snow avalanches is one of the most important problems in avalanche zoning. It is also one of the most difficult and controversial subjects in avalanche research. This is especially ...

    • The design of avalanche protection dams : Recent practical and theoretical developments 

      Barbolini, Massimiliano; Domaas, Ulrik; Faug, Thierry; Gauer, Peter; Hákonardóttir, Kristín Martha; Harbitz, Carl Bonnevie; Issler, Dieter; Jóhannesson, Tómas; Lied, Karstein; Naaim, Mohamed; Naaim-Bouvet, Florence (EUR;23339, Research report, 2009)
      This book discusses the design of dams and other protective measures in the run-out zones of wet- and dry-snow avalanches. It summarises recent theoretical developments and the results of field and laboratory studies, ...

    • The design of avalanche protection dams. Recent practical and theoretical developments 

      Johannesson, Tomas; Gauer, Peter; Lied, Karstein; Barbolini, Massimiliano; Domaas, Ulrik; Faug, Thierry; Hakonardottir, Kristin Martha; Harbitz, Carl Bonnevie; Issler, Dieter; Naaim, Florence; Naaim, Mohamed; Rammer, Lambert (Lecture, 2008)
      Recent experimental and theoretical studies of the flow of avalanches against obstructions have been used, in combination with traditional design guidelines, to formulate recommendations for the design of dams and other ...

    • Design of snow avalanche deflecting dams 

      Harbitz, Carl Bonnevie; Domaas, Ulrik; Engen, Arne (Chapter, 2000)
      Extensive effort has been put into improved understanding of avalanche deflection over the last two years. This paper discusses construction of deflecting dams in steep terrain, and gives an in-depth description of the ...

    • Effects of curvature in avalanche deflecting dams 

      Moe, Arne; Irgens, Fridtjov; Domaas, Ulrik; Harbitz, Carl Bonnevie (Chapter, 2005)
      Avalanches and other types of slides represent significant danger to people and property in large parts of the world. Deflecting dams, i.e. dams that change the courses of avalanches to prevent impact upon houses or roads, ...

    • The EU CADZIE database for extreme and deflected snow avalanches 

      Domaas, Ulrik (NGI-rapport;20001289-01, Research report, 2001-09-05)
      ABSTRACT. The EU program CADZIE (Catastrophic Avalanches: Defence Structures and Zoning in Europe), was established after the catastrophic 1999 avalanche winter in Europe. The overall objective of the program is improved ...

    • EU Program CADZIE WP5. Norwegian zoning tools. 

      Domaas, Ulrik (NGI-rapport;20011001-02, Research report, 2001-04-20)
      In Work Package 5, Task 2 of the EU-Program CADZIE (Catastrophic Avalanches, Defence Structures and Zoning in Europe), each participating country will contribute to Deliverable D9: Pre-standardisation of zoning tools. The ...

    • On avalanche run-up heights on deflecting dams: Centre of mass computations compared to observations. 

      Domaas, Ulrik; Harbitz, Carl Bonnevie (NGI Publication;203, Chapter, 1998)
      This article reports on the observed run-up heights of avalanches in terrain formations that act as "natural deflecting dams" with oblique angle of incidence. To compensate for the deficiencies of today's methods, the ...

    • On the computation of parameters that model snow avalanche motion 

      Bakkehøi, Steinar; Cheng, T.; Domaas, Ulrik; Lied, K.; Perla, R.; Schieldrop, B. (Journal article, 1981)
      This paper explores the computational problem of finding suitable numbers to use in a twoparameter model of snow avalanche dynamics. The two parameters are friction, y, and a ratio of avalanche mass to drag, MID. Given a ...

    • Penzenlähner avalanche - calculation of maximum run-out of snow avalanches. Presentation of the results from the Norwegian working group 

      Domaas, Ulrik (Journal article, 1999)
      In order to find a probable run-out of extreme snow avalanches in the area east of HU:1gerburg of the Penzenlahnerlawine, we have used three different methods to calculate runout in the same manner as in Norway. The models ...

    • Simulations of dense snow avalanches on deflecting dams 

      Irgens, Fridtjov; Schieldrop, Bonsak; Harbitz, Carl Bonnevie; Domaas, Ulrik; Opsahl, Runar (Journal article, 1998)
      Two models simulating snow avalanches impacting retaining dams at oblique angles of incidence are presented. First, a lumped-mass model applying the Voellmy-Perla equation is used to calculate the path of the centre-of-mass ...

    • SIP8 - offshore geohazards and SIP6 - snøskredforskning. 3D- visualization of slides and the NIS slide model 

      Domaas, Ulrik (NGI-rapport;20021023-36, Research report, 2005-03-31)
      Numerical models are important tools for hazard assessment, and visualization is an important tool for pre-processing the input to those models and presenting results from the model runs. Visualization results address ...

    • Snøskredulykke mellom Reipelven og Stortuva omtrent 600 m østnordøst (56 grader Ø) for nordenden av Svartevatnet, Rognan, Saltdal kommune, lørdag 2. januar 1982 

      Domaas, Ulrik (NGI-rapport;58810-02, Research report, 1982-02-04)
      2.januar 1982 omkom en 15 ar gammel gutt i et flaksn0skred ca. 600 m 0st-nord0st (560 0) for nordenden av Svartevatnet, Rognan, Saltdal kommune. Gutten gikk pa ski ved foten av en 20 m h0Y skraning (malt vertikalt). ...

    • Snøskredulykke på Grytsjøkammen, Overhalla kommune, 21. februar 1981 

      Domaas, Ulrik (NGI-rapport;58810-01, Research report, 1981-03-17)
      21.februar 1981 omkom en kvinne i snøskred fra grytsjøkammen, overhalla kommune. Tre skiløpere gikk inn i løsneområdet. Flakskredet gikk fordi et tynt løst lag i snødekket brøt sammen under fokksnøen av den ekstra vekten ...