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| Titel |
Role of intertidal wetlands for tidal and storm tide attenuation along a confined estuary: a model study |
| VerfasserIn |
S. Smolders, Y. Plancke, S. Ides, P. Meire, S. Temmerman |
| 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 Sciences ; 15, no. 7 ; Nr. 15, no. 7 (2015-07-30), S.1659-1675 |
| Datensatznummer |
250119608
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| Publikation (Nr.) |
 copernicus.org/nhess-15-1659-2015.pdf |
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| Zusammenfassung |
| Coastal lowlands and estuaries are subjected to increasing flood risks
during storm surges due to global and regional changes. Tidal wetlands are
increasingly valued as effective natural buffers for storm surges by
dissipating wave energy and providing flood water storage. While previous
studies focused on flood wave attenuation within and behind wetlands, this
study focuses on the effects of estuarine wetland properties on the
attenuation of a storm tide that propagates along the length of an estuary.
Wetland properties including elevation, surface area, and location within
the estuary were investigated using a numerical model of the Scheldt estuary
(Belgium, SW Netherlands). For a spring tide lower wetland elevations result
in more attenuation of high water levels along the estuary, while for a
higher storm tide higher elevations provide more attenuation compared to
lower wetland elevations. For spring and storm tide a larger wetland surface
area results in a better attenuation along the estuary up to a threshold
wetland size for which larger wetlands do not further contribute to more
attenuation. Finally a wetland of the same size and elevation, but located
more upstream in the estuary, can store a larger proportion of the local
flood volume and therefore has a larger attenuating effect on upstream high
water levels. With this paper we aim to contribute towards a better
understanding and wider implementation of ecosystem-based adaptation to
increasing estuarine flood risks associated with storms. |
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