数値シミュレーションによる八代海の潮汐潮流特性に関する研究(沿岸域の流れと物質循環(2),一般講演)

概要

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Mercury dispersed in a coastal area and an ocean causes bioaccumulation in bodies of large fish and shellfish through the food chain. Dynamics of mercury in an actual sea are associated with physical, chemical, and biochemical processes. To develop the numerical model for mercury transport and fate, it is necessary to understand the physical mechanism of the mercury transport at least. In this research, we developed the depth-averaged numerical model of tide and tidal current in the Yatsushiro Sea with a highly resolved curve linear coordinate system. A few characteristics of tide, tidal currents, and transport process in the Yatsushiro Sea were investigated numerically. As a result of this research, it becomes clear that i) the M_2 tide in the Yatsushiro Sea is amplified by the Ariake Sea, but the Yatsushiro Sea have the opposite effect on the M_2 tide in the Ariake Sea. ii) the diurnal tidal currents is dominant rather than the semi-diurnal one in the sea area around the Minamata, and iii) the substances initially released into the Minamata Bay can spread over the whole area of the Yatsushiro Sea for one month.
日本流体力学会の論文
2007-08-06