Do salt marshes survive sea level rise? Modelling wave action, morphodynamics and vegetation dynamics

Ü.S.N. Best (Corresponding Author), M. Van der Wegen, J. Dijkstra, P.W.J.M. Willemsen, B.W. Borsje, Dano J.A. Roelvink

    Research output: Contribution to journalArticleAcademicpeer-review

    7 Citations (Scopus)
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    Abstract

    This paper aims to fundamentally assess the resilience of salt marsh-mudflat systems under sea level rise. We applied an open-source schematized 2D area model (Delft3D) that couples intertidal flow, wave-action, sediment transport, geomorphological development with a population dynamics approach including temporal and spatial growth of vegetation and bio-accumulation. Wave-action maintains a high sediment concentration on the mudflat while the tidal motion transports the sediments within the vegetated marsh areas during flood. The marsh-mudflat system attained dynamic equilibrium within 120 years. Sediment deposition and bio-accumulation within the marsh make the system initially resilient to sea level rise scenarios. However, after 50–60 years the marsh system starts to drown with vegetated-levees being the last surviving features. Biomass accumulation and sediment supply are critical determinants for the marsh drowning rate and survival. Our model methodology can be applied to assess the resilience of vegetated coast lines and combined engineering solutions for long-term sustainability.
    Original languageEnglish
    Pages (from-to)152-166
    Number of pages15
    JournalEnvironmental modelling & software
    Volume109
    DOIs
    Publication statusPublished - 1 Nov 2018

    Fingerprint

    wave action
    vegetation dynamics
    Sea level
    morphodynamics
    saltmarsh
    marsh
    Sediments
    Salts
    mudflat
    Bioaccumulation
    modeling
    sediment
    bioaccumulation
    Population dynamics
    Levees
    Sediment transport
    Coastal zones
    Sustainable development
    Dynamical systems
    Biomass

    Keywords

    • Salt marshes
    • Mudflats
    • Bio-geomorphology
    • Sea level rise (SLR)
    • Waves
    • Mud-morphodynamics

    Cite this

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    title = "Do salt marshes survive sea level rise?: Modelling wave action, morphodynamics and vegetation dynamics",
    abstract = "This paper aims to fundamentally assess the resilience of salt marsh-mudflat systems under sea level rise. We applied an open-source schematized 2D area model (Delft3D) that couples intertidal flow, wave-action, sediment transport, geomorphological development with a population dynamics approach including temporal and spatial growth of vegetation and bio-accumulation. Wave-action maintains a high sediment concentration on the mudflat while the tidal motion transports the sediments within the vegetated marsh areas during flood. The marsh-mudflat system attained dynamic equilibrium within 120 years. Sediment deposition and bio-accumulation within the marsh make the system initially resilient to sea level rise scenarios. However, after 50–60 years the marsh system starts to drown with vegetated-levees being the last surviving features. Biomass accumulation and sediment supply are critical determinants for the marsh drowning rate and survival. Our model methodology can be applied to assess the resilience of vegetated coast lines and combined engineering solutions for long-term sustainability.",
    keywords = "Salt marshes, Mudflats, Bio-geomorphology, Sea level rise (SLR), Waves, Mud-morphodynamics",
    author = "{\"U}.S.N. Best and {Van der Wegen}, M. and J. Dijkstra and P.W.J.M. Willemsen and B.W. Borsje and Roelvink, {Dano J.A.}",
    year = "2018",
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    language = "English",
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    Do salt marshes survive sea level rise? Modelling wave action, morphodynamics and vegetation dynamics. / Best, Ü.S.N. (Corresponding Author); Van der Wegen, M.; Dijkstra, J.; Willemsen, P.W.J.M.; Borsje, B.W.; Roelvink, Dano J.A.

    In: Environmental modelling & software, Vol. 109, 01.11.2018, p. 152-166.

    Research output: Contribution to journalArticleAcademicpeer-review

    TY - JOUR

    T1 - Do salt marshes survive sea level rise?

    T2 - Modelling wave action, morphodynamics and vegetation dynamics

    AU - Best, Ü.S.N.

    AU - Van der Wegen, M.

    AU - Dijkstra, J.

    AU - Willemsen, P.W.J.M.

    AU - Borsje, B.W.

    AU - Roelvink, Dano J.A.

    PY - 2018/11/1

    Y1 - 2018/11/1

    N2 - This paper aims to fundamentally assess the resilience of salt marsh-mudflat systems under sea level rise. We applied an open-source schematized 2D area model (Delft3D) that couples intertidal flow, wave-action, sediment transport, geomorphological development with a population dynamics approach including temporal and spatial growth of vegetation and bio-accumulation. Wave-action maintains a high sediment concentration on the mudflat while the tidal motion transports the sediments within the vegetated marsh areas during flood. The marsh-mudflat system attained dynamic equilibrium within 120 years. Sediment deposition and bio-accumulation within the marsh make the system initially resilient to sea level rise scenarios. However, after 50–60 years the marsh system starts to drown with vegetated-levees being the last surviving features. Biomass accumulation and sediment supply are critical determinants for the marsh drowning rate and survival. Our model methodology can be applied to assess the resilience of vegetated coast lines and combined engineering solutions for long-term sustainability.

    AB - This paper aims to fundamentally assess the resilience of salt marsh-mudflat systems under sea level rise. We applied an open-source schematized 2D area model (Delft3D) that couples intertidal flow, wave-action, sediment transport, geomorphological development with a population dynamics approach including temporal and spatial growth of vegetation and bio-accumulation. Wave-action maintains a high sediment concentration on the mudflat while the tidal motion transports the sediments within the vegetated marsh areas during flood. The marsh-mudflat system attained dynamic equilibrium within 120 years. Sediment deposition and bio-accumulation within the marsh make the system initially resilient to sea level rise scenarios. However, after 50–60 years the marsh system starts to drown with vegetated-levees being the last surviving features. Biomass accumulation and sediment supply are critical determinants for the marsh drowning rate and survival. Our model methodology can be applied to assess the resilience of vegetated coast lines and combined engineering solutions for long-term sustainability.

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    KW - Mudflats

    KW - Bio-geomorphology

    KW - Sea level rise (SLR)

    KW - Waves

    KW - Mud-morphodynamics

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    DO - 10.1016/j.envsoft.2018.08.004

    M3 - Article

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    JO - Environmental modelling & software

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