Experiment-supported modelling of salt marsh establishment

Daan Willem Poppema, Pim Wilhelmus Johannes Maria Willemsen, Mindert de Vries, Zhenchang Zhu, Bastiaan Wijnand Borsje, Suzanne J.M.H. Hulscher

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

Recently, the use of salt marshes in front of hard structures is increasingly proposed as a more sustainable coastal protection measure. Yet, salt marsh restoration and creation is often hampered by the lack of a thorough understanding of initial vegetation establishment. Recent studies highlight the importance of bed level change for salt marsh development. In this study we continue the examination of the impact of bed level change on salt marsh development, focussing on the prediction of salt marsh establishment and the implications for coastal management. First, a test with Spartina anglica seedlings (Cordgrass) in a wave flume showed that long-term (seasonal) bed level change is more important for seedling survival than direct wave impact at the shoot. Therefore, we subsequently incorporated bed level change in the Windows of Opportunity (WoO) framework. Lastly, this revised WoO framework was applied to the design of the Marconi pioneer salt marsh (The Netherlands). Combining the WoO framework with a morphodynamic model (Delft3D) showed its potential for salt marsh design. The framework can be used to determine whether salt marsh establishment is possible, to find out which conditions are limiting establishment and to design engineering measures creating the conditions that facilitate salt marsh establishment.
LanguageEnglish
Pages238-250
JournalOcean & coastal management
Volume168
DOIs
Publication statusPublished - 2019

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salt marshes
saltmarsh
modeling
experiment
Spartina anglica
seedling
coastal protection
seedlings
morphodynamics
coastal zone management
Netherlands
engineering
shoot
vegetation
shoots
prediction

Cite this

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title = "Experiment-supported modelling of salt marsh establishment",
abstract = "Recently, the use of salt marshes in front of hard structures is increasingly proposed as a more sustainable coastal protection measure. Yet, salt marsh restoration and creation is often hampered by the lack of a thorough understanding of initial vegetation establishment. Recent studies highlight the importance of bed level change for salt marsh development. In this study we continue the examination of the impact of bed level change on salt marsh development, focussing on the prediction of salt marsh establishment and the implications for coastal management. First, a test with Spartina anglica seedlings (Cordgrass) in a wave flume showed that long-term (seasonal) bed level change is more important for seedling survival than direct wave impact at the shoot. Therefore, we subsequently incorporated bed level change in the Windows of Opportunity (WoO) framework. Lastly, this revised WoO framework was applied to the design of the Marconi pioneer salt marsh (The Netherlands). Combining the WoO framework with a morphodynamic model (Delft3D) showed its potential for salt marsh design. The framework can be used to determine whether salt marsh establishment is possible, to find out which conditions are limiting establishment and to design engineering measures creating the conditions that facilitate salt marsh establishment.",
author = "Poppema, {Daan Willem} and Willemsen, {Pim Wilhelmus Johannes Maria} and {de Vries}, Mindert and Zhenchang Zhu and Borsje, {Bastiaan Wijnand} and Hulscher, {Suzanne J.M.H.}",
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Experiment-supported modelling of salt marsh establishment. / Poppema, Daan Willem; Willemsen, Pim Wilhelmus Johannes Maria; de Vries, Mindert; Zhu, Zhenchang; Borsje, Bastiaan Wijnand; Hulscher, Suzanne J.M.H.

In: Ocean & coastal management, Vol. 168, 2019, p. 238-250.

Research output: Contribution to journalArticleAcademicpeer-review

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AB - Recently, the use of salt marshes in front of hard structures is increasingly proposed as a more sustainable coastal protection measure. Yet, salt marsh restoration and creation is often hampered by the lack of a thorough understanding of initial vegetation establishment. Recent studies highlight the importance of bed level change for salt marsh development. In this study we continue the examination of the impact of bed level change on salt marsh development, focussing on the prediction of salt marsh establishment and the implications for coastal management. First, a test with Spartina anglica seedlings (Cordgrass) in a wave flume showed that long-term (seasonal) bed level change is more important for seedling survival than direct wave impact at the shoot. Therefore, we subsequently incorporated bed level change in the Windows of Opportunity (WoO) framework. Lastly, this revised WoO framework was applied to the design of the Marconi pioneer salt marsh (The Netherlands). Combining the WoO framework with a morphodynamic model (Delft3D) showed its potential for salt marsh design. The framework can be used to determine whether salt marsh establishment is possible, to find out which conditions are limiting establishment and to design engineering measures creating the conditions that facilitate salt marsh establishment.

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