THE STRUCTURE OF NEARSHORE CURRENTS DRIVEN BY CHANGES IN METEO-MARINE FORCINGS
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Keywords

nearshore circulation
microtidal barred beach
vertical velocity structure

How to Cite

Petitjean, L., Sous, D., Rey, V., Bouchette, F., Sabatier, F., & Meulé, S. (2017). THE STRUCTURE OF NEARSHORE CURRENTS DRIVEN BY CHANGES IN METEO-MARINE FORCINGS. Coastal Engineering Proceedings, 1(35), currents.5. https://doi.org/10.9753/icce.v35.currents.5

Abstract

This work aims to better understand the physical processes governing the wave propagation in a vertically sheared current and the resulting nearshore circulation patterns. It is based on a high resolution hydro-morphodynamic field campaign, ROUSTY2014, collecting a comprehensive hydro-morphodynamical dataset during a full winter season. The overall analysis highlights three main circulation patterns, largely controled by the bathymetric features and by co-working or competing wind and waves forcings. Regarding the vertical structuration of the circulation, most of field observations shown seaward directed circulation with onshore component close to the air/sea surface whose intensity varies according to incoming wave conditions. Forth, vertical shear increase when breaking happen close to sensor location and orientation of mean circulation depend on wind direction.
https://doi.org/10.9753/icce.v35.currents.5
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References

J. C. Church and E. B. Thornton. Effects of breaking wave induced turbulence within a longshore current model. Coastal engineering, 20(1-2):1-28, 1993.

D. T. Cox and N. Kobayashi. Application of an undertow model to irregular waves on plane and barred beaches. Journal of coastal research, pages 1314-1324, 1998.

M. Dyhr-Nielsen and T. Sørensen. Some sand transport phenomena on coasts with bars. In Coastal Engineering 1970, pages 855-865. 1970.

A. Faria, E. Thornton, T. Lippmann, and T. Stanton. Undertow over a barred beach. Journal of Geophysical Research: Oceans, 105(C7):16999-17010, 2000.

F. Feddersen and R. Guza. Observations of nearshore circulation: Alongshore uniformity. Journal of Geophysical Research: Oceans, 108(C1), 2003.

B. Greenwood and P. D. Osborne. Vertical and horizontal structure in cross-shore flows: an example of undertow and wave set-up on a barred beach. Coastal Engineering, 14(6):543-580, 1990.

J. W. Haines and A. H. Sallenger. Vertical structure of mean cross-shore currents across a barred surf zone. Journal of Geophysical Research: Oceans, 99(C7):14223-14242, 1994.

J. B. Hansen and I. Svendsen. A theoretical and experimental study of undertow. In Coastal Engineering 1984, pages 2246-2262. 1985.

M. Larson and N. C. Kraus. Numerical model of longshore current for bar and trough beaches. Journal of Waterway, Port, Coastal, and Ocean Engineering, 117(4):326-347, 1991.

Y. Leredde, C. Denamiel, E. Brambilla, C. Lauer-Leredde, F. Bouchette, and P. Marsaleix. Hydrodynamics in the gulf of aigues-mortes, nw mediterranean sea: In situ and modelling data. Continental Shelf Research, 27(18):2389-2406, 2007.

M. S. Longuet-Higgins. Longshore currents generated by obliquely incident sea waves: 1. Journal of geophysical research, 75(33):6778-6789, 1970.

A. Okayasu, T. Shibayama, and K. Horikawa. Vertical variation of undertow in the surf zone. In Coastal Engineering 1988, pages 478-491. 1989.

J. O'Rourke and P. LeBlond. Longshore currents in a semicircular bay. Journal of Geophysical Research, 77(3):444-452, 1972.

A. Ouahsine, H. Smaoui, K. Meftah, P. Sergent, and F. Sabatier. Numerical study of coastal sandbar migration, by hydro-morphodynamical coupling. Environ. Fluid. Mech., 13:169-187, 2013.

A. Petrenko. Variability of circulation features in the gulf of lion nw mediterranean sea. importance of inertial currents. Oceanologica Acta, 26(4):323-338, 2003.

A. Petrenko, Y. Leredde, and P. Marsaleix. Circulation in a stratified and wind-forced gulf of lions, nw mediterranean sea: in situ and modeling data. Continental Shelf Research, 25(1):7-27, 2005.

U. Putrevu and I. A. Svendsen. Vertical structure of the undertow outside the surf zone. Journal of Geophysical Research: Oceans, 98(C12):22707-22716, 1993.

A. Reniers, E. Thornton, T. Stanton, and J. Roelvink. Vertical flow structure during sandy duck: observations and modeling. Coastal Engineering, 51(3):237-260, 2004.

V. Rey, J. Charland, and J. Touboul. Wave-current interaction in the presence of a three-dimensional bathymetry: Deep water wave focusing in opposing current conditions. Physics of Fluids, 26(9):096601, 2014.

F. Sabatier. Fonctionnement et dynamiques morpho-sédimentaires du littoral du delta du Rhône. PhD thesis, Université d'Aix-Marseille III, 2001.

F. Sabatier. Modélisation de l'impact du changement climatique sur l'érosion des dunes. application à la camargue. La Houille Blanche, (1):40-49, 2008.

F. Sabatier, E. J. Anthony, A. Héquette, S. Suanez, J. Musereau, M.-H. Ruz, and H. Régnauld. Morphodynamics of beach/dune systems: examples from the coast of france. Géomorphologie: relief, processus, environnement, (1/2009):3-22, 2009a.

F. Sabatier, O. Samat, A. Ullmann, and S. Suanez. Connecting large-scale coastal behaviour with coastal management of the rhône delta. Geomorphology, 107(1):79-89, 2009b.

J. M. Smith, M. Larson, and N. C. Kraus. Longshore current on a barred beach: Field measurements and calculation. Journal of Geophysical Research: Oceans, 98(C12):22717-22731, 1993a.

J. M. Smith, I. A. Svendsen, and U. Putrevu. Vertical structure of the nearshore current at delilah: Measured and modeled. In Coastal Engineering 1992, pages 2825-2838. 1993b.

M. Stive and H. Wind. Cross-shore mean flow in the surf zone. Coastal Engineering, 10(4):325-340, 1986.

E. Thornton, R. Humiston, and W. Birkemeier. Bar/trough generation on a natural beach. Journal of Geophysical Research: Oceans, 101(C5):12097-12110, 1996.

E. B. Thornton. Variation of longshore current across the surf zone. In Coastal Engineering 1970, pages 291-308. 1970.

E. B. Thornton and R. Guza. Transformation of wave height distribution. Journal of Geophysical Research: Oceans, 88(C10):5925-5938, 1983.

E. B. Thornton and R. T. Guza. Surf zone longshore currents and random waves: Field data and models. Journal of Physical Oceanography, 16(7):1165-1178, 1986.

F. C. Ting and J. T. Kirby. Observation of undertow and turbulence in a laboratory surf zone. Coastal Engineering, 24(1-2):51-80, 1994.

D. J. Whitford and E. B. Thornton. Comparison of wind and wave forcing of longshore currents. Continental Shelf Research, 13(11):1205-1218, 1993.

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