Mapping of Landslide Risks in a Changing Climate – Development of Simplified Methodology

Odén, Karin; Bergdahl, Karin; Löfroth, Hjördis; Göransson, Gunnel; Jönsson, Åsa; Kiilsgaard, Ramona; Öberg, Mats

doi:10.1007/978-3-319-56487-6_49

Cited by 2 publications

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“…First, landslide probability is determined for non-transient condition and only with respect to knowledge uncertainty. The stability of a slope can be calculated using SLOPE/W, or a similar tool, and the evaluation of the probability of failure using the point estimation method (see for example Rosenblueth, 1975Rosenblueth, , 1981Odén et al, 2017). Knowledge uncertainty is then assessed for the most crucial/selected parameters, in this case undrained shear strength, friction angle, bulk density and level of permeable layer.…”

Section: Submarine Landslide Induced Resuspension (L)mentioning

confidence: 99%

Assessing the Risk of Contaminant Dispersion From Fibrous Sediments of Industrial Origin

et al. 2021

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Unregulated discharges of wastewater from pulp and paper factories resulted in the formation of relatively thick organic (cellulose) rich sediments in shallow waters along the Swedish coast. These deposits are known as fiberbanks and are contaminated by persistent organic pollutants (POPs), metals and methylmercury, which can be dispersed by diffusion and advective processes coupled to propeller wash, high river discharges, strong wind waves and submarine landslides. Based on a case study of polychlorinated biphenyls (PCBs), one group of prevalent POPs in the fiberbanks, we present a probabilistic approach to estimate the potential risk of dispersion of fiberbank contaminants. The approach allows for estimation of the dispersal pathways that dominates the risk within a given time and provides more insight about the significance of various dispersion processes. We show that it is highly likely that chemical diffusion and advection triggered by ship-induced resuspension will disperse PCBs (sum of seven congeners; Σ7PCB) above a threshold level for environmental impact, while the likelihood of river and wind-wave generated resuspension dispersion pathways are lower (∼20%, respectively). We further show that there is approximately 5% likelihood that a submarine landslide will disperse Σ7PCB above the threshold level. The study implies that the governing parameters for risk assessment specifically should include reliable data on contaminant concentration, water depth above the fiberbank, estimation of concerned fiberbank areas, time duration of erosive fluid flows and measured diffusion. The approach provides insight into the importance of various dispersion processes. We suggest that it can be applied to support risk assessment, especially when there are limited available data and/or knowledge about the system under study.

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Section: Submarine Landslide Induced Resuspension (L)mentioning

confidence: 99%

Assessing the Risk of Contaminant Dispersion From Fibrous Sediments of Industrial Origin

et al. 2021

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Climate Change Adaptation of Geo-Structures in Europe: Emerging Issues and Future Steps

et al. 2021

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Climate change is already being felt in Europe, unequivocally affecting the regions’ geo-structures. Concern over this is rising, as reflected in the increasing number of studies on the subject. However, the majority of these studies focused only on slopes and on a limited geographical scope. In this paper, we attempted to provide a broader picture of potential climate change impacts on the geo-structures in Europe by gathering the collective view of geo-engineers and geo-scientists in several countries, and by considering different geo-structure types. We also investigated how geo-structural concerns are being addressed in national adaptation plans. We found that specific provisions for geo-structural adaptation are generally lacking and mainly come in the form of strategies for specific problems. In this regard, two common strategies are hazard/risk assessment and monitoring, which are mainly implemented in relation to slope stability. We recommend that in future steps, other geo-structures are likewise given attention, particularly those assessed as also potentially significantly affected by climate change. Countries considered in this study are mainly the member countries of the European Large Geotechnical Institutes Platform (ELGIP).

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Mapping of Landslide Risks in a Changing Climate – Development of Simplified Methodology

Cited by 2 publications

References 1 publication

Assessing the Risk of Contaminant Dispersion From Fibrous Sediments of Industrial Origin

Assessing the Risk of Contaminant Dispersion From Fibrous Sediments of Industrial Origin

Climate Change Adaptation of Geo-Structures in Europe: Emerging Issues and Future Steps

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