大阪湾における超大型海洋構造物周りの保存性物質の拡散シミュレーションと評価法

概要

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For planning various kinds of the very large offshore structures in the enclosed sea, it became more important that grasping the change of the tidal current and assessment of water quality due to the diffusion of the pollutant, for example, COD (chemical oxygen demand). The authors previously calculated the tidal current and its seawater exchange around an offshore structure in Osaka bay. In this paper,using the above tidal current data, the diffusion of the primary COD (the allochtonous COD) flowing into Osaka bay from Yodo river and so on was calculated numerically by use of the diffusion equation. The obtained results were compared with the hydraulic model tests and the accurancy of calculation was confirmed. This method was also applied to the Kansai international airport (phase 2: under construction ) and was found a practical tool to estimate environmental impact.
2002-03-25