WAVE BOUNDARY LAYER HYDRODYNAMICS DURING ONSHORE BAR MIGRATION

Martijn Henriquez, Ad Reniers, Gerben Ruessink, Marcel Stive

Abstract


To study onshore bar migration and the accompanying intra-wave sediment transport a wave flume experiment was conducted. The wave flume had a rigid bottom with a single bar profile. The focus of the experiment was to measure the hydrodynamics in the wave bottom boundary layer. The results show that the skewness of bottom stress is not only related to wave skewness but also to wave asymmetry.

Keywords


non-linear waves; wave bottom boundary layer, bottom shear stress; nearshore morphology

References


Aubrey, D. 1979. Seasonal patterns of onshore/offshore sediment movement, Journal of Geophysical Research, 84, 6347-6354.http://dx.doi.org/10.1029/JC084iC10p06347

Bailard, J.A. 1981. An energetics total load sediment transport model for a plane sloping beach. Journal of Geophysical Research 86, 10938–10954. http://dx.doi.org/10.1029/JC086iC11p10938

Bowen, A.J. 1980. Simple models of nearshore sedimentation: beach profiles and longshore bars, The Coastline of Canada, 80-10, 1-11.

Groeneveld, R.A., and G. Meeden. 1984. Measuring Skewness and Kurtosis, The Statistician, 33 (4), 391-399.http://dx.doi.org/10.2307/2987742

Henderson, S.M., J.S. Allen, and P.A. Newberger. 2004. Nearshore sandbar migration predicted by an eddy-diffusive boundary layer model, Journal of Geophysical Research, 109.

Henriquez, M., M.J.F. Stive, A.J.H.M. Reniers, B.G. Ruessink, T.P. Stanton and D.L. Foster. 2008. On the scaling of sediment transport in the nearshore, Coastlab 2008 Conference, IAHR, 193-204.

Hoefel, F., and S. Elgar. 2003. Wave-induced sediment transport and sandbar migration, Science. PMid:12649479http://dx.doi.org/10.1126/science.1081448

Kennedy, A.B., Q. Chen, J.T. Kirby, and R.A. Dalrymple. 2000, Boussinesq modeling of wave transformation, breaking and runup. I: One dimension, J. Waterway, Port, Coastal and Ocean Engrng., 126, 39-47. http://dx.doi.org/10.1061/(ASCE)0733-950X(2000)126:1(39)

Longuet-Higgins, M.S. 1953. Mass transport in water waves, Phil. Trans. R. Soc. (A) 245, 535-581. http://dx.doi.org/10.1098/rsta.1953.0006

Madsen, O.S. 1974. Stability of a sand bed under breaking waves, Proceedings of 14th International Conf. on Coastal Engineering, 776-794.

Nielsen, P. 2006. Sheet flow sediment transport under waves with acceleration skewness and boundary layer streaming, Coastal Engineering, 53, 749-758. http://dx.doi.org/10.1016/j.coastaleng.2006.03.006

Stokes, G.G. 1847. On the theory of oscillatory waves, Trans. Camb. Phil. Soc. 8, 441-445.

Trowbridge, J.H., and D. Young. 1989. Sand transport by unbroken water waves under sheet flow conditions, Journal of Geophysical Research, 94, 10971-10991.http://dx.doi.org/10.1029/JC094iC08p10971

Wright, L.D., and A.D. Short. 1984. Morphodynamics variability of surf zones and beaches: a synthesis, Marine Geology, 26, 93-118.http://dx.doi.org/10.1016/0025-3227(84)90008-2


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