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    Sediment resuspension and nepheloid layers induced by long internal solitary waves shoaling orthogonally on uniform slopes

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    Bourgault_et_al_2013-1.pdf (10.87Mb)
    Date
    2013-10-20
    Author
    Bourgault, Daniel  Concept link
    Morsilli, M.  Concept link
    Richards, Clark G.  Concept link
    Neumeier, U.  Concept link
    Kelley, Daniel E.  Concept link
    Metadata
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    Citable URI
    https://hdl.handle.net/1912/6454
    As published
    https://doi.org/10.1016/j.csr.2013.10.019
    Keyword
     Internal solitary wave; Sediment; Nepheloid layer; Numerical modelling; Sedimentary structures 
    Abstract
    Two-dimensional, nonlinear and nonhydrostatic field-scale numerical simulations are used to examine the resuspension, dispersal and transport of mud-like sediment caused by the shoaling and breaking of long internal solitary waves on uniform slopes. The patterns of erosion and transport are both examined, in a series of test cases with varying conditions. Shoreward sediment movement is mainly within boluses, while seaward movement is within intermediate nepheloid layers. Several relationships between properties of the suspended sediment and control parameters are determined such as the horizontal extent of the nehpeloid layers, the total mass of resuspended sediment and the point of maximum bed erosion. The numerical results provide a plausible explanation for acoustic backscatter patterns observed during and after the shoaling of internal solitary wavetrains in a natural coastal environment. The results may further help interpret sedimentary structures that may have been shaped by internal waves and add an another e ective mechanism for o shore dispersal of muddy sediments.
    Description
    Author Posting. © The Author(s), 2013. This is the author's version of the work. It is posted here by permission of Elsevier for personal use, not for redistribution. The definitive version was published in Continental Shelf Research 72 (2014): 21-33, doi:10.1016/j.csr.2013.10.019.
    Collections
    • Physical Oceanography (PO)
    Suggested Citation
    Preprint: Bourgault, Daniel, Morsilli, M., Richards, Clark G., Neumeier, U., Kelley, Daniel E., "Sediment resuspension and nepheloid layers induced by long internal solitary waves shoaling orthogonally on uniform slopes", 2013-10-20, https://doi.org/10.1016/j.csr.2013.10.019, https://hdl.handle.net/1912/6454
     

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