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  • 1.
    Grahn, Tonje
    et al.
    Karlstad University, Faculty of Health, Science and Technology (starting 2013), Department of Environmental and Life Sciences.
    Nyberg, Rolf
    Karlstad University, Faculty of Health, Science and Technology (starting 2013), Centre for Climate and Safety.
    Damage assessment of lake floods: Insured damage to private property during two lake floods in Sweden 2000/20012014In: International Journal of Disaster Risk Reduction, E-ISSN 2212-4209, Vol. 10, p. 305-314Article in journal (Refereed)
    Abstract [en]

    This study analyses empirical data on the direct damage impact of lake floods using insurance claims for 195 private buildings. A relationship between lake water levels and insurance payments is established, but the estimated economic effects are small. Building damage also occurs in fringe areas that are not reached by surface water, which indicates a complex interplay between several factors influencing the degree of damage. Large lake floods occur over an extended time span (months). Their duration, as well as possible wind effects, should be taken into account in flood risk assessment. The slow onset of lake floods facilitates implementation of private damage-reducing measures in addition to public mitigation efforts. Private damage-reducing measures decrease the risk of structural damage to buildings, easing recovery for homeowners and society as a whole. Insurance companies can gain from investing in public flood awareness programmes and by providing information to their insurance holders on how to reduce property vulnerability in emergency situations.

  • 2. Jonasson, C.
    et al.
    Nyberg, Rolf
    Karlstad University, Faculty of Social and Life Sciences, Department of Geography and Tourism. Karlstad University, Faculty of Social and Life Sciences, Centre for Climate and Safety.
    The rainstorm of August 1998 in the Abisko area, northern Sweden: preliminary report on observations of erosion and sediment transport1999In: Geografiska Annaler 81A (3), 1999Article in journal (Refereed)
  • 3. Jonasson, C.
    et al.
    Nyberg, Rolf
    Karlstad University, Faculty of Social and Life Sciences, Department of Geography and Tourism. Karlstad University, Faculty of Social and Life Sciences, Centre for Climate and Safety.
    Rapp, A.
    Dating of rapid mass movements in Scandinavia: talus rockfalls, large rockslides, debris flows and slush avalanches1997In: / [ed] Frenzel et al, 1997Conference paper (Refereed)
  • 4. Lindblad, K.E.M.
    et al.
    Nyberg, Rolf
    Karlstad University, Faculty of Social and Life Sciences, Department of Geography and Tourism. Karlstad University, Faculty of Social and Life Sciences, Centre for Climate and Safety.
    Molau, U.
    Generalization of heterogeneous alpine vegetation in air photo-based image classification, Latnjajaure catchment, northern Sweden2006In: Pirineos: Revista de Ecología de Montaña, ISSN 0373-2568, E-ISSN 1988-4281, Vol. 161, no 3a32Article in journal (Refereed)
    Abstract [en]

    Mapping alpine vegetation at a meso-scale (catchment level) using remote sensing presents difficulties due to a patchy distribution and heteregeneous spectral appearance of the plant cover. We discuss issues of generalization and accuracy assessment in this case study when using a digital CIR air photo for an automatic classification of the dominant plant communities. About 10 plant communities could be classified with acceptable accuracy where the chosen classification scheme determined the final outcome. If a high resolution pixel mosaic is generalized to units that match the positional accuracy of simple GPS this generalization may also influence the information content of the image

  • 5.
    Nyberg, Rolf
    Karlstad University, Faculty of Social and Life Sciences, Department of Geography and Tourism. Karlstad University, Faculty of Social and Life Sciences, Centre for Climate and Safety.
    Debris flows and slush avalanches in northern Swedish Lappland: Distribution and geomorphological significance1985Doctoral thesis, monograph (Other academic)
  • 6.
    Nyberg, Rolf
    Karlstad University, Faculty of Social and Life Sciences, Department of Geography and Tourism. Karlstad University, Faculty of Social and Life Sciences, Centre for Climate and Safety.
    Freeze-thaw activity and some of its geomorphic implications in the Abisko mountains, Swedish Lapland1993In: Permafrost and Periglacial Processes, Vol.4, No.1, 1993Article in journal (Refereed)
  • 7.
    Nyberg, Rolf
    Karlstad University, Faculty of Social and Life Sciences, Department of Geography and Tourism. Karlstad University, Faculty of Social and Life Sciences, Centre for Climate and Safety.
    Geographic Information Systems and Computer Cartography1996Report (Other academic)
  • 8.
    Nyberg, Rolf
    Karlstad University, Faculty of Social and Life Sciences, Department of Geography and Tourism. Karlstad University, Faculty of Social and Life Sciences, Centre for Climate and Safety.
    Geomorphic processes at snowpatch sites in the Abisko mountains, northern Sweden1991In: Zeitschrift fur Geomorphologie N.F. Bd 35, Heft 3Article in journal (Refereed)
  • 9.
    Nyberg, Rolf
    Karlstad University, Faculty of Social and Life Sciences, Centre for Climate and Safety.
    GIS-tillämpningar inom översvämningshantering: en forskningsöversikt2010Report (Other academic)
    Abstract [sv]

    På grund av inträffade översvämningar under senare år har behovet av effektiva åtgärder vid förebyggande arbete och katastrofhantering av händelserna ökat. Geografiska informationssystem (GIS) används till att visualisera utbredning av översvämningar, till att analysera underlag för riskkartering och som beslutsstöd vid katastrofinsatser. I rapporten tas upp hur GIS använts i olika studier om översvämningsproblematik, både i Sverige och internationellt. Kort berörs även att GIS-teknik i ökande omfattning utnyttjas i webbaserade tjänster bl.a. för informationsförmedling och riskvarning om översvämningar. 

    En förutsättning för att tillförlitliga GIS-analyser av översvämningsrisk skall kunna göras är att översvämningsmodelleringen håller hög noggrannhet. Enligt flera studier kräver detta att detaljerade höjddata finns att tillgå. Sådana har på senare år börjat bli tillgängliga genom datainsamling via flygburen laserskanning. En ny höjdmodell med förbättrad noggrannhet är under uppbyggnad i Sverige och en liknande utveckling sker internationellt.

    Ett antal internationella exempel på metodstudier kring GIS-baserad uppskattning av konsekvenser av översvämningar beskrivs. Hittills har främst ekonomiska konsekvenser undersökts, och i mindre utsträckning miljömässiga, sociala och kulturella påföljder, vilket efterfrågas i EU:s översvämningsdirektiv. En metod som provats bl.a. i Tyskland är multikriterieanalys baserat på rasterdata i GIS, varvid geografisk variation i olika faktorer kan sammanvägas som kriterier på översvämningsrisk. Detta ger förbättrade möjligheter att inräkna även ekonomiskt svårmätbara konsekvenser i riskbedömningen.

  • 10.
    Nyberg, Rolf
    Karlstad University, Faculty of Social and Life Sciences, Department of Geography and Tourism. Karlstad University, Faculty of Social and Life Sciences, Centre for Climate and Safety.
    Observations of slushflows and their geomorphological effects in the Swedish mountain area1989In: Geografiska Annaler 71A(3-4)Article in journal (Refereed)
  • 11.
    Nyberg, Rolf
    et al.
    Karlstad University, Faculty of Social and Life Sciences, Department of Geography and Tourism. Karlstad University, Faculty of Social and Life Sciences, Centre for Climate and Safety.
    Bax, Gerhard
    The use of DEMs and geologic maps for visualization of landslide sites, Torneträsk area, N Sweden1996In: / [ed] Bax, G, 1996Conference paper (Refereed)
  • 12.
    Nyberg, Rolf
    et al.
    Karlstad University, Faculty of Health, Science and Technology (starting 2013).
    Johansson, Magnus
    Karlstad University, Faculty of Health, Science and Technology (starting 2013).
    Indicators of road network vulnerability to storm-felled trees2013In: Natural Hazards, ISSN 0921-030X, E-ISSN 1573-0840, Vol. 69, no 1, p. 185-199Article in journal (Refereed)
    Abstract [en]

    In this paper, we exemplify the use of simple indicators of wind storm vulnerability of the road network that can be derived from existing geographic datasets. We point out the possible utilization of the datasets, applying GIS techniques, for highlighting road sections that, due to adjacency of high forest stands, are sensitive to closure by stormfelled trees. Indicators reflecting the reduced access to different areas or to the population in need of emergency aid can be derived based on the parameter tree height along roads and road network analysis. As a case in this study, the methodology is applied to elderly people (?80 years) with possible need of daily care at home following a severe storm. A comparison to the extreme 2005 storm felling in southern Sweden reveals that only limited estimates of road network disruption due to storm-felled trees are possible using the indicators, as other factors, for example, wind direction, which determine the exact impact of a particular storm are not taken into account. However, the indicators and network analysis also provide a possibility to draw attention to locations where disruptions of the road network would have significant effects on the accessibility to large surrounding areas. Potential critical road closures can be identified and preventive measures considered locally at these points.

  • 13.
    Nyberg, Rolf
    et al.
    Karlstad University, Faculty of Social and Life Sciences, Department of Geography and Tourism. Karlstad University, Faculty of Social and Life Sciences, Centre for Climate and Safety.
    Lindh, Lars
    Geomorphic features as indicators of climatic fluctuations in a periglacial environment, northern Sweden1990In: Geografiska Annaler 72A (2), 1990Article in journal (Refereed)
  • 14.
    Nyberg, Rolf
    et al.
    Karlstad University, Faculty of Social and Life Sciences, Department of Geography and Tourism. Karlstad University, Faculty of Social and Life Sciences, Centre for Climate and Safety.
    Rapp, Anders
    Extreme erosional events and natural hazards in Scandinavian mountains1998In: Ambio Vol.27 No.4, June 1998Article in journal (Refereed)
  • 15.
    Nyberg, Rolf
    et al.
    Karlstad University, Faculty of Social and Life Sciences, Department of Geography and Tourism. Karlstad University, Faculty of Social and Life Sciences, Centre for Climate and Safety.
    Ridefelt, H
    Åkerman, J
    Beylich, A.A
    Boelhouwers, J
    Kolstrup, E
    56 years of solifluction measurements in the Abisko Mountains, northern Sweden-: analysis of temporal and spatial variations of slow soil surface movement2009In: Geografiska Annaler. Series A, Physical Geography, ISSN 0435-3676, E-ISSN 1468-0459, Vol. 91, no 3, p. 215-232Article in journal (Refereed)
    Abstract

    Solifluction movement rates from 1952 to 2008 for the Abisko region, N Sweden, have been compiled and analysed through correlation tests and multiple regression. It is concluded that movement rates may increase with high mean annual air temperature in the western part of the region, the spatial variability of movement rates within the region is very high and that altitude (and/or permafrost) together with wetness index are the main controls on the regional spatial variation. The study highlights the limitations in establishing statistical relationships between movement rates and climate using data from different field empirical studies

  • 16. Rapp, Anders
    et al.
    Jonasson, Christer
    Nyberg, Rolf
    Karlstad University, Faculty of Social and Life Sciences, Department of Geography and Tourism. Karlstad University, Faculty of Social and Life Sciences, Centre for Climate and Safety.
    Extrema sommarregn med översvämningar och jordskred. Ett utslag av klimatändring i Norden efter 1950-talet?1997Other (Other (popular science, discussion, etc.))
1 - 16 of 16
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