Dasar Laut Sinusoidal Sebagai Reflektor Gelombang

Authors

  • Viska Noviantri Bina Nusantara University

DOI:

https://doi.org/10.21512/comtech.v2i1.2781

Keywords:

Bragg resonance, multiple scale asymptotic expansion, sinusoidal sandbars

Abstract

This article discusses about the influence of sinusoidal sandbars towards the amplitude of incident wave. sinusoidal sandbars may lead to Bragg resonance. Basically, when a wave meets a different depth, it will scatter into a transmitted wave and a reflected wave. Bragg resonance happens when the wavelength of incident wave is twice of the wavelength of the periodic bottom disturbance. We apply the multi-scale asymptotic expansion to obtain the results. Eventually we find that a larger amplitude disturbance leads to larger reflected wave amplitude. This result explains that the sinusoidal sandbars indeed can reduce the amplitude of incident wave and protect a beach from large amplitude incident waves.

 

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References

Hirose, A., and Karl. E. L. (1985). Introduction to Wave Phenomena. New York: John Wiley and Sons.

Holmes, M. H. (1995). Introduction to Perturbation Methods. New York: Springer-Verlag.

Mei, C. C. (2004). Multiple Scattering by an Extended Region of Inhomogeneities. Wave Propagation, Fall.

Philip, L., and Liu, F. (1986). Resonant Reflection of Water Waves in a Long Channel with Corrugated Boundaries. J.Fluid Mech, 179, 371-381. New York: Cornell University.

Strauss, A. W. (1992). Partial Differential Equations: An Introduction. New York: John Wiley and Sons.

Yu, J., and Mei, C. C. (2000). Do Longshore Bars Shelter the Shore?. J. Fluid Mech, 404, 251-268.

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Published

2011-06-01

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Articles
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