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The morphodynamics of tidal sand waves: a model overview

The morphodynamics of tidal sand waves: a model overview
The morphodynamics of tidal sand waves: a model overview
This paper reviews recent theoretical studies of sand waves which are rhythmic large-scale bedforms observed in the continental shelf far from the near-shore region. Emphasis is given to the investigations carried out in the framework of the EU research project HUMOR. First, the results of linear morphodynamic stability analyses are described, which allow to understand the initial behavior of the sand waves. Hence, indications on the physical processes controlling the appearance and development of sand waves are obtained along with quantitative predictions of the wavelength of sand waves and of their migration speed. Then, nonlinear models are described which are used to predict the equilibrium profile of sand waves and their interaction with human interventions like sand extraction or the construction of pipelines. Finally, we discuss an analytical model which describes how the sand wave instability behaves when it is triggered locally; this leads to the generation, growth and expansion of a so-called sand wave packet
morphodynamics, tidal bedforms, sand waves
0378-3839
Besio, G.
aaad5ddb-e664-40a0-b6af-f035c9305747
Blondeaux, P.
2133e382-c9c5-43b5-9353-64de26f5b328
Brocchini, M.
d33c5bce-709f-4575-a040-348dc246e49c
Hulscher, S.J.M.
b2984836-2e8a-4b14-a3c4-7649a6338aaa
Idier, D.
97fa7ea8-1c2d-4e30-becd-dd1303e00989
Knaapen, M. A. F.
6a412efa-c285-4af3-8f07-1182f06faa58
Nemeth, A.A.
8807efa8-3f51-4916-bf61-468328105cf6
Roos, P.C.
95aca039-cbd4-485a-ae9c-4348c5de5ecf
Vittori, G.
8759c378-149e-4e97-b2ab-db3fca056474
Besio, G.
aaad5ddb-e664-40a0-b6af-f035c9305747
Blondeaux, P.
2133e382-c9c5-43b5-9353-64de26f5b328
Brocchini, M.
d33c5bce-709f-4575-a040-348dc246e49c
Hulscher, S.J.M.
b2984836-2e8a-4b14-a3c4-7649a6338aaa
Idier, D.
97fa7ea8-1c2d-4e30-becd-dd1303e00989
Knaapen, M. A. F.
6a412efa-c285-4af3-8f07-1182f06faa58
Nemeth, A.A.
8807efa8-3f51-4916-bf61-468328105cf6
Roos, P.C.
95aca039-cbd4-485a-ae9c-4348c5de5ecf
Vittori, G.
8759c378-149e-4e97-b2ab-db3fca056474

Besio, G., Blondeaux, P., Brocchini, M., Hulscher, S.J.M., Idier, D., Knaapen, M. A. F., Nemeth, A.A., Roos, P.C. and Vittori, G. (2008) The morphodynamics of tidal sand waves: a model overview. Coastal Engineering, 55 (7-8). (doi:10.1016/j.coastaleng.2007.11.004).

Record type: Article

Abstract

This paper reviews recent theoretical studies of sand waves which are rhythmic large-scale bedforms observed in the continental shelf far from the near-shore region. Emphasis is given to the investigations carried out in the framework of the EU research project HUMOR. First, the results of linear morphodynamic stability analyses are described, which allow to understand the initial behavior of the sand waves. Hence, indications on the physical processes controlling the appearance and development of sand waves are obtained along with quantitative predictions of the wavelength of sand waves and of their migration speed. Then, nonlinear models are described which are used to predict the equilibrium profile of sand waves and their interaction with human interventions like sand extraction or the construction of pipelines. Finally, we discuss an analytical model which describes how the sand wave instability behaves when it is triggered locally; this leads to the generation, growth and expansion of a so-called sand wave packet

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More information

Published date: July 2008
Keywords: morphodynamics, tidal bedforms, sand waves

Identifiers

Local EPrints ID: 75844
URI: https://eprints.soton.ac.uk/id/eprint/75844
ISSN: 0378-3839
PURE UUID: f24f46a1-fc71-42c8-a8d0-5ad5dd29d55f

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Date deposited: 11 Mar 2010
Last modified: 17 Jul 2019 00:15

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