有明海奥部西岸域における貧酸素水塊形成に及ぼす物理的及び生化学的要因の影響  [in Japanese] Effects of Physical and Biochemical Factors on Formation of Hypoxic Water in the Western Interior Parts of the Ariake Sea  [in Japanese]

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Abstract

本研究は,有明海奥部西岸域において夏季小潮時を中心に形成され,この海域の生態系や漁業に悪影響を及ぼしている貧酸素水塊について,現地観測データ及び2層ボックスモデルにより,貧酸素水塊形成に及ぼす物理的及び生化学的要因の影響について明らかにすることを目的とした.有明海奥部の貧酸素水塊の形成時間率は,底質の含泥率やCODの高い西岸域において高かった.また,この海域の貧酸素水塊は,密度躍層の形成される小潮時において発生,拡大した.しかし,観測年により貧酸素水塊の分布や規模に違いが見られた.さらに,対象海域における貧酸素水塊形成の有無には,底層のDO消費率が他の物理的及び生化学的要因に比べて,常に強く影響した.

In the present study, the formation situation and effects of physical and biochemical factors on formation of hypoxic water which has bad influence on the ecosystem and fishery in the interior parts of the Ariake Sea were investigated on the base of observation data and two-layer box model. Formation time rate of hypoxic water was high in the western parts with high COD and mud content. And hypoxic water was occurred and expanded at neap tide with the formation of density stratification. However, the expansions of its formation area were different every each time. Moreover, DO consumption rate in the bottom layer of the study area strongly influenced the formation or not of hypoxic water in consumption with the other physical and biochemical factors.

Journal

  • Transactions of The Japanese Society of Irrigation, Drainage and Rural Engineering

    Transactions of The Japanese Society of Irrigation, Drainage and Rural Engineering 78(3), 209-217, 2010-06-25

    The Japanese Society of Irrigation, Drainage and Rural Engineering

References:  23

Codes

  • NII Article ID (NAID)
    10026879388
  • NII NACSIS-CAT ID (NCID)
    AA12240517
  • Text Lang
    JPN
  • Article Type
    ART
  • ISSN
    18822789
  • NDL Article ID
    10759003
  • NDL Source Classification
    ZR7(科学技術--農林水産--農産)
  • NDL Call No.
    Z18-365
  • Data Source
    CJP  NDL  J-STAGE 
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