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dc.contributor.advisorSchive, Tor
dc.contributor.advisorLarsen, Jan Otto
dc.contributor.authorEngelke, Christian
dc.date.accessioned2015-09-24T12:20:02Z
dc.date.available2015-09-24T12:20:02Z
dc.date.issued2012-06-30
dc.description.abstractDebris flows are a mountain slope hazard relatively well studied in densely populated mountainous regions, while few investigations have been done in Arctic permafrost regions. In order to get a better understanding of the processes involved in such an envi-ronment, this work focused on debris flow hazards in the mountains close to Longyear-byen and Svea on Svalbard, Norway, situated at 78°N. A total of 52 debris flows were investigated in this Arctic environment between July and October 2011. The gathered slope information was embedded in highly accurate map data of the regions in order to get slope profiles of the debris flows. Those profiles were used for both empirical and dynamical modeling of the debris flow runout. Empirical modeling showed that the mainland-calibrated αβ - model and NGI model may be used in order to get a better understanding about maximal runout of debris flows. In general, the output of the αβ – model and the NGI model fit the measured maximal runout. Yet, Svalbard-calibrated models show a certain degree of improvement in accuracy. For engineering purposes, linear regressions for the longest runouts were performed. The models based on these regressions are advised to use for the evaluations of possible construction sites. The model assuming a deposition start angle of 20° achieved the best result with a standard deviation of 2.09°. This model is advised to use in future con-struction site planning. The dynamical model RAMMS is a great tool for finding directions, although debris flow runouts are hard to estimate with the program.en_US
dc.identifier.urihttps://hdl.handle.net/10037/8136
dc.identifier.urnURN:NBN:no-uit_munin_7721
dc.language.isoengen_US
dc.publisherUniversitetet i Tromsøen_US
dc.publisherUniversity of Tromsøen_US
dc.rights.accessRightsopenAccess
dc.rights.holderCopyright 2012 The Author(s)
dc.rights.urihttps://creativecommons.org/licenses/by-nc-sa/3.0en_US
dc.rightsAttribution-NonCommercial-ShareAlike 3.0 Unported (CC BY-NC-SA 3.0)en_US
dc.subject.courseIDTEK-3900en_US
dc.subjectVDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Andre geofag: 469en_US
dc.subjectVDP::Mathematics and natural science: 400::Geosciences: 450::Other geosciences: 469en_US
dc.subjectVDP::Teknologi: 500::Bygningsfag: 530::Geoteknologi: 537en_US
dc.subjectVDP::Technology: 500::Building technology: 530::Geological engineering: 537en_US
dc.titleEmpirical and dynamical modeling of debris flow events close to Longyearbyen and Svea, Svalbarden_US
dc.typeMaster thesisen_US
dc.typeMastergradsoppgaveen_US


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Attribution-NonCommercial-ShareAlike 3.0 Unported (CC BY-NC-SA 3.0)
Except where otherwise noted, this item's license is described as Attribution-NonCommercial-ShareAlike 3.0 Unported (CC BY-NC-SA 3.0)