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| Titel |
Mapping wave set-up near a complex geometric urban coastline |
| VerfasserIn |
T. Soomere  , K. Pindsoo, S. R. Bishop, A. Käärd, A. Valdmann |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1561-8633
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| Digitales Dokument |
URL |
| Erschienen |
In: Natural Hazards and Earth System Science ; 13, no. 11 ; Nr. 13, no. 11 (2013-11-29), S.3049-3061 |
| Datensatznummer |
250085569
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| Publikation (Nr.) |
 copernicus.org/nhess-13-3049-2013.pdf |
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| Zusammenfassung |
| Wave induced set-up is a process that leads to increased water levels in
coastal regions. When coupled with storm conditions, wave set-up – or, for
brevity, set-up – can significantly increase the risk of flooding or
structural damage and therefore is of particular importance when considering
coastal management or issues related to the planning of nearshore
infrastructures. Here, we investigate the effects of 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 many other areas. Due to
a lack of continuous wave data we employ modelling to provide input data
using a calculation scheme based on a high-resolution (470 m) spectral wave
model WAM 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 maximum 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 encourage 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 place in many
coastal regions (including the one within this study) these results have
implications for local planners. They may also be incorporated into new
storm warning systems. |
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