A STUDY OF SEA ICE FLOE DISTRIBUTION ON OKHOTSK SEA COAST OF HOKKAIDO
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- KIOKA Shinji
- （国）土木研究所寒地土木研究所
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- ISHIDA Maiko
- （国）土木研究所寒地土木研究所
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- HASEGAWA Tomoki
- （株）丸田組
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- TAKEUCHI Takahiro
- 八戸工業大学大学院 社会基盤工学専攻
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- SAEKI Hiroshi
- 一般社団法人寒地港湾空港技術研究センター
Bibliographic Information
- Other Title
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- 北海道オホーツク海沿岸部における海氷のサイズ分布に関する一考察
- ホッカイドウ オホーツクカイ エンガンブ ニ オケル カイヒョウ ノ サイズ ブンプ ニ カンスル イチ コウサツ
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Abstract
<p> Sea ice floe distribution and their fractal dimensions on Okhotsk Sea coast of Hokkaido were analyzed from images taken by UAV in the ranges of 300m by 300m near shoreline. The floe sizes in this study had the mean of 2.14m and the median of 1.19m, and were widely distributed up to 65m. The floe sizes up to 5m accounted for 90% of the total number, and its frequency distribution had strong skewness. Although an unified fractal dimension which can be applied to the whole range of the floe size was not found, fractal dimensions were able to be defined in three divisions. Simulation methods of the floe sizes using plural fractal dimensions and a theoretical probability distribution (log-normal) were also discussed. Fundamental knowledges useful for engineering issues such as an occurrence prediction of ice jam formation considering non-uniformity of ice floe size were obtained.</p>
Journal
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- Journal of Japan Society of Civil Engineers, Ser. B3 (Ocean Engineering)
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Journal of Japan Society of Civil Engineers, Ser. B3 (Ocean Engineering) 76 (2), I_905-I_910, 2020
Japan Society of Civil Engineers