Transformation of Directional Wave Spreading in the Surf Zone Using Video Image Data

  • Muhammad Zikra Department of Ocean Engineering, Faculty of Marine Technology, Institut Teknologi Sepuluh Nopember (ITS), Keputih Sukolilo, Surabaya, Indonesia
  • Noriaki Hashimoto Department of Urban and Environmental Engineering, Faculty of Engineering, Kyushu University, Fukuoka, Kyushu, Japan
  • Masaru Yamashiro Department of Urban and Environmental Eng., Faculty of Engineering, Kyushu University, Fukuoka, Kyushu, Japan
  • Kojiro Suzuki Marine Environmental Information Group, Port & Airport Research Institute (PARI), Tokyo, Japan
DOI: http://dx.doi.org/10.36842/jomase.v4i1.517

Abstract

In present study, video images technique is used to investigate the transformation of the directional wave spreading in shallow water. The technique is based on time series of the pixel brightness on video images. The Bayesian Directional Method is conducted in estimating the directional wave spectrum for evaluating the change of the directional wave spreading in the surf zone area. Video image data recorded at Hasaki beach in Japan are used in the analysis. Estimation of principle direction and spreading parameter in the surf zone regions indicated that principle directions at peak frequency are not strongly affected by wave breaking process. In contrast, the broadenings of directional spreading were observed when the waves start breaking on the sand bar and toward the shore area.

##Keywords:## Video Images; Directional Wave Spectra; Principle Direction; Spreading Parameter.
Published
Feb 20, 2014
How to Cite
ZIKRA, Muhammad et al. Transformation of Directional Wave Spreading in the Surf Zone Using Video Image Data. Journal of Ocean, Mechanical and Aerospace -science and engineering-, [S.l.], v. 4, n. 1, p. 17-22, feb. 2014. ISSN 2527-6085. Available at: <https://isomase.org/Journals/index.php/jomase/article/view/517>. Date accessed: 13 may 2026. doi: http://dx.doi.org/10.36842/jomase.v4i1.517.
Citation Formats
Issue
Vol 4 No 1 (2014): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Section
Articles

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