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Historic storms and the hidden value of coastal wetlands for nature-based flood defence
Zhu, Z.; Vuik, V.; Visser, P.J.; Soens, T.; van Wesenbeeck, B.K.; van de Koppel, J.; Jonkman, S.N.; Temmerman, S.; Bouma, T.J. (2020). Historic storms and the hidden value of coastal wetlands for nature-based flood defence. Nature Sustainability online: [1-13]. https://hdl.handle.net/10.1038/s41893-020-0556-z

Bijhorende info:
In: Nature Sustainability. Springer Nature Publishing: England. e-ISSN 2398-9629, meer
Peer reviewed article  

Beschikbaar in  Auteurs 

Trefwoorden
    Earth sciences > Geology > Hydrology
    Ecology
    Engineering
Author keywords
    Natural hazards

Auteurs  Top 
  • Zhu, Z., meer
  • Vuik, V.
  • Visser, P.J.
  • Soens, T.
  • van Wesenbeeck, B.K.
  • van de Koppel, J., meer
  • Jonkman, S.N.
  • Temmerman, S.
  • Bouma, T.J., meer

Abstract
    Global change amplifies coastal flood risks and motivates a paradigm shift towards nature-based coastal defence, where engineered structures are supplemented with coastal wetlands such as saltmarshes. Although experiments and models indicate that such natural defences can attenuate storm waves, there is still limited field evidence on how much they add safety to engineered structures during severe storms. Using well-documented historic data from the 1717 and 1953 flood disasters in Northwest Europe, we show that saltmarshes can reduce both the chance and impact of the breaching of engineered defences. Historic lessons also reveal a key but unrecognized natural flood defence mechanism: saltmarshes lower flood magnitude by confining breach size when engineered defences have failed, which is shown to be highly effective even with long-term sea level rise. These findings provide new insights into the mechanisms and benefits of nature-based mitigation of flood hazards, and should stimulate the development of novel safety designs that smartly harness different natural coastal defence functions.

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