外洋性港湾における出入港時諸問題の現地調査 : 日本海に面した港湾での波浪特牲の分析

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In this study, it is necessary to find out some problems about the ship operation in harbours facing to open seas. At first, the hearing research is carried out for many harbours nationwide to know present operational situations and problems. Then, we research on the operation record of the maritime company in the harbour (H Port) facing to the Sea of Japan. Moreover, wave data are analyzed for one of the observation points of NOWPHAS (Nationwide Ocean Wave information network for Ports and HArbourS) near the harbour when ship operations become impossible in recent years. Some relations can be found between operational records and waves. Therefore, main conclusions are obtained as follows. (1) Operators feel so difficulties for ships on the safety of departing and entering harbours facing to open seas when sea conditions are serious. (2) It is cleared that waves are the most important factor to evaluate the safety of ship-handling in harbours facing to open seas. (3) The most dangerous situation is occurred for entering ships when they are altering course near harbours in following seas. (4) The operation becomes impossible in H Port when significant waves become more than 2.0m and 6s in winter season. (5) When the ship operation becomes difficult in H Port, wave heights grow about wave components in 5-8s at first. Then, wave heights tend to grow about wave components in 8-12s with 2-8hours of time lag in most cases. However, these wave heights grow at the same time in some cases. It is necessary to research on growth patterns of waves in detail when ships cannot operate in the future.
社団法人日本航海学会の論文
2003-03-25

外洋性港湾における出入港時諸問題の現地調査 : 日本海に面した港湾での波浪特牲の分析

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