Blar i Norwegian Geotechnical Institute (NGI) Digital Archive på forfatter "Jónsson, Árni"
-
Analysis of an artificially triggered avalanche at the nepheline syenite mine on Stjernøya, Alta, Northern Norway
Frauenfelder, Regula; Jónsson, Árni; Lied, Karstein; Schwerdtfeger, Dirk; Bergum, Guro; Bühler, Yves; Stoffe, Lukas (The International Snow Science Workshop (ISSW) Proceedings;, Chapter, 2014)Since 1961, a Nepheline Syenite mine is operated on the island of Stjernøya in the Altafjord, Northern Norway. The facilities are located in Lillebukt, on the southern side of the island. Above the facilities, the Nabbaren ... -
Avalanche risk along a 420 kv transmission line in Iceland.
Jónsson, Árni; Bakkehøi, Steinar; Hauksson, Sigurjón (The International Snow Science Workshop (ISSW) Proceedings;, Chapter, 2006)Two transmission lines between Fljótsdalur and Reyðarfjörður in northeast Iceland have been investigated concerning snow avalanche hazard. Given a specific level of probability of failure for both the lines less than ... -
Impacts of extreme weather events on transport infrastructure in Norway
Frauenfelder, Regula; Solheim, Anders; Isaksen, Ketil; Romstad, Bård; Dyrrdal, Anita Verpe; Ekseth, Kristine; Skaland, Reidunn Gangstø; Harbitz, Alf; Harbitz, Carl Bonnevie; Haugen, Jan Erik; Hygen, Hans Olav; Haakenstad, Hilde; Jaedicke, Christian; Jónsson, Árni; Klæboe, Ronny; Ludvigsen, Johanna; Meyer, Nele Kristin; Rauken, Trude; Sverdrup-Thygeson, Kjetil (Journal article, 2016) -
National database for mitigative measures against rapid gravity mass flows and rock falls
Jónsson, Árni; Syre, Egil; Ekseth, Kristine Helene Hetland; Smebye, Helge; Paulsen, Eivind Magnus (Lecture, 2012)Mitigation measures against natural catastrophes, such as rapid gravity mass flows and rock falls, have been built in Norway for centuries. Over the last few decades the number of new constructions has been increasing due ... -
Remote sensing of avalanches in northern Norway using Synthetic Aperture Radar
Malnes, Eirik; Eckerstorfer, Markus; Larsen, Yngvar; Frauenfelder, Regula; Jónsson, Árni; Jaedicke, Christian; Solbø, Stian A. (The International Snow Science Workshop (ISSW) Proceedings;, Chapter, 2013)We present results from using synthetic aperture radar data (SAR) to analyse three avalanches in the county of Troms in northern Norway during the late snow season 2013. During a persistent polar low pressure activity at ... -
Sheet pile walls - a space-saving avalanche defense structure.
Jónsson, Árni; Hestnes, Erik (The International Snow Science Workshop (ISSW) Proceedings;, Chapter, 2006)Steel sheet piles, primarily used as retaining walls when excavating soft ground and for stabilizing fills, are introduced as flexible components for a variety of effective and space-saving avalanche defense structures. ... -
Snow drift challenges at Klettsháls mountain road pass in Iceland
Jónsson, Árni; Árnason, Ingvi; Thoroddsen, Eiður B. (The International Snow Science Workshop (ISSW) Proceedings;, Chapter, 2014)Snow fences are usually used to control snowdrift problems on a relatively flat and open terrain. Snowdrift problems on mountain roads and passes are normally more challenging. The terrain is often more complex, winds can ... -
Snøskred i Skarbekkdalen Oppdal, befaringsnotat
Jónsson, Árni (NGI-rapport;20140053-02-TN, Research report, 2015-12-14)Mandagen den 9. februar 2015 ble politiet i Oppdal varslet om snøskred som hadde løsnet i Skarbekkdalen, ett område som ligger mellom hovedskisentre i Vangslia og en skiheis på Prestauran, Figur 1. Skredet hadde en utbredelse ... -
The Challenges of Mitigation Measures in Longyearbyen Svalbard
Jónsson, Árni; Nerland, Ørjan; Kanstad, Stian Bue; Hellum, Øyvind S.; Lande, Einar John (Lecture, 2018)The Arctic regions are facing changes in climate; warmer weather and more intense precipitations are thought to be the consequences. Longyearbyen in Svalbard is one of those places where warmer weather has been influencing ... -
The use of commercial cad software in snow avalanche run-out estimation
Jónsson, Árni; Hauksson, Sigurjón (The International Snow Science Workshop (ISSW) Proceedings;, Chapter, 2012)Linear infrastructures like highways and transmission lines often pass avalanche terrain both in remote and urban areas. In some cases these areas are quite wide, measured along the lines, and the number of avalanche paths ... -
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 ...