SPATIAL AND TEMPORAL DISTRIBUTIONS OF DISSOLVED OXYGEN AND NUTRIENTS AROUND ARTIFICIALLY RECLAIMED LANDS IN ESTUARIES

Masayasu IRIE, Keiji NAKATSUJI, Shuzo NISHIDA, Mamoru ISHIGAKI, Yuki KUBOTA
2006 PROCEEDINGS OF HYDRAULIC ENGINEERING  
2 フェロー 工博 大阪大学大学院教授 工学研究科地球総合工学専攻(〒565-0871 吹田市山田丘2-1) 3 正会員 工博 大阪大学大学院助教授 工学研究科地球総合工学専攻(〒565-0871 吹田市山田丘2-1) Water mass which is deficient in oxygen spreads in the Port of Amagasaki-Nishinomiya -Ashiya in the head of Osaka Bay from April to November. In the past two years field survey of dissolved oxygen has been carried out in the port, but the detailed dynamics of the oxygen-deficient water is not clear totally in the head of the port. In the present paper a new field survey of DO and
more » ... ts is conducted in small water areas around the reclaimed islands in the head of the port. The water areas are divided into two types, that is, the small and enclosed areas in the head and the other area in the port. In the head of the port excess production of phytoplankton increases, and the great deal of organic nutrients makes the concentration of DO very low in spring. This oxygen-deficient water spreads out to the other water area in early summer. The behavior of the oxygen-deficient water in each area is linked together in high summer.
doi:10.2208/prohe.50.1411 fatcat:kxduohwunjg4xjy43on6x7uzi4