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Remote impacts of typhoons on the hydrodynamics, sediment transport and bed stability of an intertidal wetland in the Yangtze Delta
Yang, S.L.; Fan, J.Q.; Shi, B.W.; Bouma, T.J.; Xu, K.H.; Yang, H.F.; Zhang, S.S.; Zhu, Q.; Shi, X.F. (2019). Remote impacts of typhoons on the hydrodynamics, sediment transport and bed stability of an intertidal wetland in the Yangtze Delta. J. Hydrol. (Amst.) 575: 755-766. https://dx.doi.org/10.1016/j.jhydrol.2019.05.077
In: Journal of Hydrology. Elsevier: Tokyo; Oxford; New York; Lausanne; Shannon; Amsterdam. ISSN 0022-1694; e-ISSN 1879-2707, meer
Peer reviewed article  
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Author keywords
    Typhoon; Mudflat; Saltmarsh; Intertidal wetland; Storm impact; Yangtze Delta
Auteurs  Top 
  • Yang, S.L.
  • Fan, J.Q.
  • Shi, B.W.
  • Bouma, T.J., meer
  • Xu, K.H.
  • Yang, H.F.
  • Zhang, S.S.
  • Zhu, Q.
  • Shi, X.F.
Abstract
    Intertidal wetlands are widely considered to be vulnerable to storm impacts. While much attention has been given to the effect of hurricane/typhoon landfall on local erosion/deposition in intertidal wetlands, less is known about how distant hurricanes/typhoons can affect an intertidal wetland or about the comprehensive effects of hurricanes/typhoons on hydrodynamics, sediment transport and seabed stability. Here, we investigate the possible impacts of thirteen typhoons that occurred in the western Pacific during summer–autumn 2016 on an intertidal wetland in the Yangtze Delta. We detected the impacts from eight of the typhoons during half of their duration when these typhoons were 450–2000 km away (nearest distance ever for each typhoon) from the delta. These remote typhoons caused 2–5 times maximum increases in hydrodynamics and suspended sediment concentration. Correspondingly, considerable net mudflat erosion and marsh deposition were observed. We therefore conclude that intertidal wetlands can be strongly affected by typhoons, even those passing by hundreds of kilometres away. These findings contribute to understand how far and in what extent hurricanes/typhoons can affect intertidal wetlands and to increase knowledge needed for coastal management.
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