Publication Date:
2022-05-25
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.
Description:
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:
This research was funded by the Natural Sciences
and Engineering Research Council of Canada (D. Bourgault)
and by the Spanish Research Project CGL2009-13254 (M. Morsilli).
Keywords:
Internal solitary wave
;
Sediment
;
Nepheloid layer
;
Numerical modelling
;
Sedimentary structures
Repository Name:
Woods Hole Open Access Server
Type:
Preprint
Format:
application/pdf
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