Field Observation of Secondary Undulation "Abiki" in Urauchi Bay, Kami-Koshiki Island

• ASANO Toshiyuki

  Kagoshima University

• YAMASHIRO Toru

  Kagoshima University

• TAKESHITA Akira

  Tokyo Kyuei Co.

• SAKAMOTO Hiroaki

  Tokyo Kyuei Co.

• NISHIMURA Norihiro

  Tokyo Kyuei Co.

Bibliographic Information

Other Title

• 上甑島浦内湾における「あびき」の現地観測

Abstract

A long term field observation was conducted on the secondary undulations locally called "Abiki" occurred in Urauchi-bay, Kami-Koshiki Island. A comprehensive observation deployment for the sea level, current and barometric pressure was taken covering not only inside and nearby Urauchi-bay but also offshore field in the East China Sea. Vigorous secondary undulations greater than 150cm were happened over 5 days during 82 days' observation period. Just before the Abiki events, the atmospheric disturbances were found to travel eastward or north-eastward at a speed around 140km/h, which was resonantly coupled with the ocean wave in the offshore site. The observed Abiki heights can roughly be explained by the forced resonance in the offshore and the amplification after entering the bay.

Journal

• Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering)

  Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering) 67 (2), I_176-I_180, 2011

  Japan Society of Civil Engineers

Keywords

• secondary undulation
• field observation
• isolated island
• coastal disaster

Details

• CRID: 1390001205320695424
• NII Article ID: 20001067502
• NII Article ID: 130004550455
• DOI: 10.2208/kaigan.67.i_176
• ISSN: 18838944
• ISSN: 18842399
• Text Lang: en
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed