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Publication Detail
Mapping wave set-up near a complex geometric urban coastline
  • Publication Type:
    Journal article
  • Publication Sub Type:
  • Authors:
    Bishop SR, Soomere T, Pindsoo K, Kaard A, Valdmann A
  • Publisher:
    Open Access
  • Publication date:
  • Pagination:
    1, 38
  • Journal:
    Natural Hazards and Earth System Sciences
  • Volume:
  • Status:
  • Language:
Wave set-up is a process that leads to increased water levels in coastal regions. When coupled with storm conditions, set-up can significantly increase the risk of flooding or structural damage and therefore is of particular importance when considering coastal 5 management or planning issues related to near-shore infrastructures. Here, we investigate the effects of wave set-up in the coastal region of the Gulf of Finland in the Baltic Sea close to Tallinn, Estonia, although the results will have wider relevance for other areas. Due to a lack of continuous wave data we employ modelling to provide input data using a simplified calculation scheme based on a high-resolution (470 m) spectral 10 wave modelWAM to replicate spatial patterns of wave properties based on high-quality, instrument measured wind data from the neighbourhood of the study site. The results indicate that for the specific geometry of coastline under consideration, there is a variation in set-up which is strongly affected by wind direction. The maximum set-up values are up to 70–80 cm in selected locations. This is more than 50% of the all-time max15 imum water level and thus may serve as a substantial source of marine hazard for several low-lying regions around the city. Wind directions during storms have changed in recent years and, with climate variability potentially increasing, these results will allow for further tests which may be used in a policy setting regarding defences or other structures in and around coastlines. In particular, with urban development now taking 20 place in many coastal regions (including the one within this study) these results have implications for local planners as well as for the introduction of storm warning systems.
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