An idealized model of tidal dynamics in semi-enclosed basins online: the effects of a mega-scale sand extraction trench in the North Sea

Wiebe de Boer, Pieter C. Roos, Suzanne J.M.H. Hulscher, Ad Stolk

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    Abstract

    We investigate the effects of a mega-scale sand extraction trench (length ~200 km, width ~10 km, depth ~10 m, located in front of the Dutch coast) on tidal dynamics in the Southern North Sea. To this end, an idealized modeling approach is adopted, extending the classical problem of Kelvin wave reflection in rectangular semi-enclosed basins to account for lateral depth variations and the presence of a trench. The model results indicate changes in tidal range (zones of decrease and increase of the order of several cm), phase and currents (order cm/s) throughout the whole basin, which emphasizes the importance of a model domain on the scale of the basin. The changes in currents may structurally change sediment transport rates by several percents, which is relevant to coastal morphology. It is argued that this idealized model can be used to support a companion study carried out with a more detailed numerical engineering model. This is because of its ability to (1) provide insight into the physical mechanisms, (2) reveal the order of magnitude and area of influence of the effects and (3) allow for a quick sensitivity analysis with respect to trench geometry.
    Original languageEnglish
    Title of host publicationProceedings of 32nd International Conference on Coastal Engineering (ICCE)
    Subtitle of host publication30 June - 5 July 2010, Shanghai
    EditorsJane McKee Smith, Patrick Lynett
    PublisherCoastal Engineering Research Council
    Pages1-7
    ISBN (Print)978-0-9896611-0-2
    DOIs
    Publication statusPublished - 30 Jun 2011
    Event32nd International Conference on Coastal Engineering, ICCE 2010 - Shanghai, China
    Duration: 30 Jun 20105 Jul 2010
    Conference number: 32

    Publication series

    NameCoastal Engineering Proceedings
    PublisherCoastal Engineering Research Council
    ISSN (Print)2156-1028

    Conference

    Conference32nd International Conference on Coastal Engineering, ICCE 2010
    Abbreviated titleICCE
    CountryChina
    CityShanghai
    Period30/06/105/07/10

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    Keywords

    • METIS-275180

    Cite this

    de Boer, W., Roos, P. C., Hulscher, S. J. M. H., & Stolk, A. (2011). An idealized model of tidal dynamics in semi-enclosed basins online: the effects of a mega-scale sand extraction trench in the North Sea. In J. McKee Smith, & P. Lynett (Eds.), Proceedings of 32nd International Conference on Coastal Engineering (ICCE): 30 June - 5 July 2010, Shanghai (pp. 1-7). (Coastal Engineering Proceedings). Coastal Engineering Research Council. https://doi.org/10.9753/icce.v32.currents.37