東京湾奥部における夏期の底層DO濃度変動と波浪擾乱との関係
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概要
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Field observations of water quality in the summer of 2010 reveal that the wind wave is one of key factors for temporary recovery of near bed dissolved oxygen (DO) concentration from hypoxic state in the inner Tokyo bay. The observation was a part of monitoring campaign to elucidate the behavior of the hypoxic water in the area. Basic parameters of water quality such as dissolved oxygen, salinity, temperature and turbidity were measured by a mooring system for 3 month from July through September in 2010. Physical parameters were also obtained for current profile by a bottom mounted ADCPs and for wind waves by an ultrasonic wave gauge respectively. DO concentration measured at 50 cm above the bottom intermittently increased especially after relatively higher wave events. The data also shows that the DO concentration near the bed is highly correlated with suspended sediment concentrations.
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