Comparison of observed and theoretically calculated seiches of Heda Bay, Japan

We carried out observations of sea-level fluctuations simultaneously at three stations on the coast of Heda Bay, Honshu, Japan, using supersonic-type water level gauges controlled by a personal computer. Analyses of the obtained data showed predominant spectral peaks at periods of 7.6, 2.0 and 1.3 m...

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Bibliographic Details
Published in:Pure and applied geophysics 1992-01, Vol.138 (2), p.309-322
Main Authors: TADA, T, TSUJI, Y, TSUKAMOTO, M, UENO, Y, KAWASHIMA, M, EGAWA, T, YAMAZAKI, Y
Format: Article
Language:English
Subjects:
Earth sciences
Earth, ocean, space
Engineering and environment geology. Geothermics
Exact sciences and technology
External geophysics
Marine
Natural hazards: prediction, damages, etc
Physics of the oceans
Surface waves, tides and sea level. Seiches
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Summary:We carried out observations of sea-level fluctuations simultaneously at three stations on the coast of Heda Bay, Honshu, Japan, using supersonic-type water level gauges controlled by a personal computer. Analyses of the obtained data showed predominant spectral peaks at periods of 7.6, 2.0 and 1.3 minutes for all three stations. Comparison of the observed data with numerically calculated normal oscillation modes of the bay indicates that these three spectral peaks correspond to the theoretical first, third and seventh normal modes of the basin respectively, judging from the results of cross-spectral analyses. The reason for the absence of the remaining normal modes, especially of the second or the lateral first mode of the basin, is briefly considered.
ISSN:0033-4553
1420-9136
DOI:10.1007/BF00878901