A coastal acoustic tomography experiment in the Tokyo Bay

KANEKO Arata; YAMAGUCHI Keisuke; YAMAMOTO Tokuo; GOHDA Noriaki; ZHENG Hong; SYAMSUDIN Fadli; LIN Ju; NGUYEN Hong-Quang; MATSUYAMA Masaji; HACHIYA Hiroyuki; HASHIMOTO Noriaki

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Article Navigation > Acta Oceanologica Sinica > 2005 > (1): 86-94

KANEKO Arata, YAMAGUCHI Keisuke, YAMAMOTO Tokuo, GOHDA Noriaki, ZHENG Hong, SYAMSUDIN Fadli, LIN Ju, NGUYEN Hong-Quang, MATSUYAMA Masaji, HACHIYA Hiroyuki, HASHIMOTO Noriaki. A coastal acoustic tomography experiment in the Tokyo Bay[J]. Acta Oceanologica Sinica, 2005, (1): 86-94.

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A coastal acoustic tomography experiment in the Tokyo Bay

1.
Graduate School of Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8527, Japan
2.
Rosenstiel School of Marine and Atmospheric Science, University of Miami, 4600 Rickenbacker Causeway, Miami, Florida 33149, USA.
3.
SEA Corporation, IU Bldg
4.
F, 2-23 Shiohama, Ichikawa, Chiba 272-0127, Japan
5.
Faculty of Engineering, Chiba University, 1-33 Yayoi, Inage-ku, Chiba 263-8522, Japan
6.
Port and Airport Research Institute, 3-1-1 Nagase, Yokosuka, Kanagawa 239-0826, Japan

Received Date: 2004-03-09
Rev Recd Date: 2004-09-20

Abstract

Abstract

Eight sets of coastal acoustic tomography (CAT) systems were deployed during November 29 to December 10,2002 at the coasts on both sides of Tokyo Bay to measure tidal current structures at 15-min interval.Sound transmission across the Tokyo Bay (between Yokohama and Chiba)was successfully traced,even under severe interference from ship generated wakes and bubbles.Tidal current fields changing from northward to southward flow are well reconstructed by the inverse analysis of travel-time difference data for a period with the best sound transmission condition.It is suggested that the CAT is the most powerful tool to continuously map tidal current fields in the coastal seas with heavy shipping traffic and fisheries activity.
- Tokyo Bay,
- coastal acoustic tomography,
- tidal current structures,
- continuous mapping