Multi-hazard risk-informed decision-support system: A case study in Oslo, Norway
| Autor: | Huang, C., Van Bever, I., Meslem, A., Mohammad Ibrahim, O., Oye, V., Schweitzer, J. |
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| Rok vydání: | 2023 |
| Zdroj: | XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) |
| DOI: | 10.57757/iugg23-0958 |
| Popis: | The Alna district in Oslo, Norway is a high profile (residential, commercial and industrial) area exposed to multiple hazards, in particular to quick clay landslides. Quick clay is a marine clay sediment where the salt that binds the clay together has been washed away over time. Thus, the structure becomes unstable, and increased point loads or erosion of waterways can trigger landslides. In case of a landslide, the quick clay becomes liquefied, and major material damage and danger to life can occur. To support the authorities in selecting the optimal risk-mitigation action, this study develops the multi-criteria decision-making methodology, which accounts for the stakeholders' preferences. The Decision Support System framework includes three key steps: 1) Identify criteria for assessing the impacts of multi-hazard scenario; 2) Identify possible measures that can reduce the impacts; 3) Give objective/subjective weighting of the identified criteria, reflecting the stakeholders’ preferences. The framework is demonstrated in a multi-hazard scenario (i.e., quick clay, flood and fire) of interest to the Oslo stakeholders. The impact of the considered scenario is evaluated in terms of five categories (i.e., life and health, nature and environment, economy, societal stability, and governance and control) and 13 single criteria. Through workshops with stakeholders, possible alternatives as well as the respective cost and mitigated impacts were estimated, and stakeholders’ preferences were collected. The optimal action under given circumstances is identified quantitatively and is highly dependent on stakeholders' preferences. Further details of the impact analysis are needed to understand the risk landscape of different alternatives. The 28th IUGG General Assembly (IUGG2023) (Berlin 2023) |
| Databáze: | OpenAIRE |
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