2層ボックスモデルによる有明海奥部西岸域における貧酸素水塊発生機構の解析 Analysis of Occurrence Mechanism of Hypoxic Water in the Western Interior Parts of the Ariake Sea Using a Two-layer Box Model

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Abstract

In order to clarify the occurrence mechanism of hypoxic water in the western interior parts ofthe Ariake Sea, the fieldobservation data collected by Saga Prefecture in 1972-2004 were analyzed using a two-layer boxmodel. Monthly variationsof mean values of convective velocity, vertical diffusion coefficient and biochemical oxygen-consumption rate inthe study area were evaluated quantitatively, and the influences of these parameters to the occurrence of hypoxic waterwere clarified. The temporal changes of DO concentration in lower layer during summer season were controlled largelyby the vertical diffusion and biochemical oxygen-consumption rates. After 1980's, a big changeof biochemical oxygenconsumptionrate was seen.

Journal

  • PROCEEDINGS OF COASTAL ENGINEERING, JSCE

    PROCEEDINGS OF COASTAL ENGINEERING, JSCE (55), 1016-1020, 2008

    Japan Society of Civil Engineers

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