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Cross-shore parallel tidal channel systems formed by alongshore currents

Author

Listed:
  • Zeng Zhou

    (Hohai University
    Hohai University)

  • Yizhang Wei

    (Hohai University)

  • Liang Geng

    (Hohai University
    East China Normal University)

  • Ying Zhang

    (Hohai University
    Bureau of Water Resources of Luhe District)

  • Yuxian Gu

    (Hohai University)

  • Alvise Finotello

    (University of Padova)

  • Andrea D’Alpaos

    (University of Padova)

  • Zheng Gong

    (Hohai University)

  • Fan Xu

    (East China Normal University)

  • Changkuan Zhang

    (Hohai University)

  • Giovanni Coco

    (University of Auckland)

Abstract

Parallel tidal channel systems, characterized by commonly cross-shore orientation and regular spacing, represent a distinct class of tidal channel networks in coastal environments worldwide. Intriguingly, these cross-shore oriented channel systems can develop in environments dominated by alongshore tidal currents, for which the mechanisms remain elusive. Here, we combine remote sensing imagery analysis and morphodynamic simulations to demonstrate that the deflection of alongshore tidal currents at transitions in bed elevation determines the characteristic orientation of the parallel tidal channels. Numerical results reveal that sharp changes in bed elevation lead to nearly 90-degree intersection angles, while smoother transitions in bed profiles result in less perpendicular channel alignments. These findings shed light on the potential manipulation of tidal channel patterns in coastal wetlands, thus equipping coastal managers with a broader range of strategies for the sustainable management of these vital ecosystems in the face of climate change and sea level rise.

Suggested Citation

  • Zeng Zhou & Yizhang Wei & Liang Geng & Ying Zhang & Yuxian Gu & Alvise Finotello & Andrea D’Alpaos & Zheng Gong & Fan Xu & Changkuan Zhang & Giovanni Coco, 2024. "Cross-shore parallel tidal channel systems formed by alongshore currents," Nature Communications, Nature, vol. 15(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-49176-2
    DOI: 10.1038/s41467-024-49176-2
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    References listed on IDEAS

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    1. Roeland C. van de Vijsel & Jim van Belzen & Tjeerd J. Bouma & Daphne van der Wal & Bas W. Borsje & Stijn Temmerman & Loreta Cornacchia & Olivier Gourgue & Johan van de Koppel, 2023. "Vegetation controls on channel network complexity in coastal wetlands," Nature Communications, Nature, vol. 14(1), pages 1-14, December.
    2. J. Taylor Perron & James W. Kirchner & William E. Dietrich, 2009. "Formation of evenly spaced ridges and valleys," Nature, Nature, vol. 460(7254), pages 502-505, July.
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