Japan Geoscience Union Meeting 2014

Presentation information

Poster

Symbol H (Human Geosciences) » H-GM Geomorphology

[H-GM22_30PO1] Geomorphology

Wed. Apr 30, 2014 6:15 PM - 7:30 PM Poster (3F)

Convener:*Shimazu Hiroshi(Department of Geography, Faculty of Geo-Environmental Science, Rissho University), Chiaki T. Oguchi(Geosphere Research Institute, Saitama University), Masayuki Seto Masayuki(Fukushima Future Center for Regional Revitalization, Fukushima University)

6:15 PM - 7:30 PM

[HGM22-P08] Field measurements on the reduction of wave height on a fringing reef: A study from the Miibaru coast, Okinawa Island

*Yu TAKEISHI1, Hisashi AOKI2, Akira MAEKADO3, Takashi HIROSE3 (1.Graduate School of Humanities and Social Sciences, University of the Ryukyus, 2.Faculty of Business Administration, Daito Bunka University, 3.Faculty of Law and Letters, University of the Ryukyus)

Keywords:Reduction of wave height, Coral reef, Fringing reef, Water depth, Okinawa Island

To investigate the relationship between reduction of wave height on a fringing reef and the water depth at the reef edge, field measurements were carried out on Miibaru coast with a fringing reef in Okinawa Island, Japan. The ratio of the shore break height (the height of final breaking waves near the shoreline) to the wave height at the reef edge, H_/H', which denotes the degree of the reduction of wave height on a reef, was found to decrease with decreasing water depth at the reef edge. This result indicates that the reduction of wave height on a reef is greatly controlled by water depth on a fringing reef.