小型漁船のための東京湾における有義波高の推定

概要

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More than 90% of fishing boats are small fishing boats smaller than 20 tons in Japan. Therefore, even significant wave heights around 1.0[m] are dangerous for small fishing boats. This paper introduces a new formula to predict significant wave height by using wind velocity and fetch and the prediction results of significant wave height around 1.0[m] in Tokyo Bay. Double amplitude of the highest one third of ship roll angle was predicted by using the relationship between significant wave height and double amplitude of the highest one third of ship roll angle. The water surface elevation was measured by the micro Doppler radar equipped on the research vessel, "Hiyodori", of Tokyo University of Marine Science and Technology from 1997 to 2003. Our proposed formula showed high accuracy and practical usage compared with the conventional formulas. Moreover the significant roll angle was predicted with high accuracy using the prediction results of the significant wave height. Our proposed formula is effective for the safety operation of small fishing boats in Tokyo Bay.
社団法人日本航海学会の論文
2005-03-25