富山新港（伏木富山港新湊区）内の海洋環境調査

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書誌事項

タイトル別名
  • Ocean Environmental Survey for Toyama-Shinko Port (Fushiki Toyama Port Shinminato District)
公開日
2019
DOI
  • 10.9749/jin.140.108
公開者
公益社団法人 日本航海学会

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説明

<p>The waters facing Toyama-Shinko Port (Fushiki Toyama Port Shinminato District) in Toyama Bay combine inflows from the Shinbori, Uchi, and Gejou Rivers with those of the open sea. Some unique flows occur in the harbor due to density differences between these two water masses, tidal forces, and the influence of the sea bottom shape. Regarding the coast around Toyama Bay, we have regularly investigated the structure of the water masses since 2003 and found that they are influenced by river water, the Tsushima warm current, and the characteristics of seasonal fluctuations.</p><p>In the present study, we conducted an ocean environmental survey using a Conductivity, Temperature, and Depth (CTD) profiler at various points inside the harbor at different locations ranging from the harbor entrance to the rivers in the harbor. In addition, we compared the results of surveys of the open sea and inside the harbor. In the CTD observations conducted in June and Sep. 2017 and Feb. 2018, we found that the influence of river water was strong from the surface to a depth of approximately 2 to 3m, and that dense seawater, similar to that of the open sea, was widely distributed in the deep water below the surface layer. And, we performed Acoustic Doppler Current Profiler (ADCP) observations in the harbor. The results indicated that the flow direction differed between the river water layer and the outer sea water layer.</p>

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