有明海奥部筑後川河口沖における流れの季節および経年変動 Seasonal and Temporal Variation in Flow off Chikugo River Mouth in the Inner Part of Ariake Sea
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Frequent occurrence of red tides and hypoxia and the extension of muddy sediments were observed in the inner part of Ariake Sea. As one of the causes for these phenomena, the change in tidal current has been considered. In this study, seasonal and year-to-year variation in the tidal current was evaluated based on the field observation obtained off Chikugo river mouth during/after the construction of Isahaya dyke. Current velocity decreased by about 23 % due to the aquaculture of Nori in autumn and winter compared with that in other seasons. The temporal trend of M2 tidal amplitude was not statistically detected during the period of 1985-1998. The change in tidal current due to the construction of the dyke was considered to be small compared with year-to-year variation. But the direction of current was changed from 1995 to 1996.
- Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering)
Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering) 65(1), 436-440, 2009
Japan Society of Civil Engineers