有義波高2m以下を対象とした東京湾における波浪スペクトル特性に関する研究

概要

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More than 90% fishing boats are smaller than 20tons in Japan. Even significant wave heights less than 2m are dangerous for small fishing boats. This paper reports characteristics of wave spectra less than 2m significant wave heights in Tokyo Bay. The water surface elevation was measured by using wave height meter based on micro Doppler radar that was equipped on research vessel "Hiyodori" of Tokyo University of Marine Science and Technology from 1997 to 2003. More than 50% data was the P-M type wave spectrum. And in case of more than 0.5m significant wave height, 80% data was the P-M type wave spectrum. However, it was difficult to apply the conventional method(ITTC, ISSC) based on the P-M wave spectrum to the shape or the frequency characteristic of the actual wave spectrum. In the actual wave spectrum for the short time series(400sec or 200sec), the variation was hardly found in the view point of bandwidth parameter ε. However, each frequency band of peak power changed during the observation.
日本水産工学会の論文
2005-11-21