BAS I C STUDY ON I MPACT FORECAST TO THE BEHAV I OR OF HYPDX I C WATER AROUN THEDREDGED HOLLOWS NEAR MUROMI RIVER MOUTH IN HAKATA BAY

本文讨论了缺氧水是如何向博多湾扩散的，以及沉积物特征的变化对缺氧水的影响，特别是在室罗米河口的两个疏浚空洞。选取东部长沿陆架样带、北部长离陆架样带和水平格网样带进行水沙质量观测。这些结果表明，低氧水主要在涨潮时从这些洼地溢出和扩散。低氧水的行为倾向于全天向东北方向移动。疏浚空洞溢出的缺氧影响了这些物种的迁徙，并可能导致博多湾生物多样性的减少。

IIn this study, we discuss about how the hypoxic water spread to the Hakata Bay and how the sediment characteristics changes in effect on the hypoxic water, especially concerning two dredged hollows placed at the Muromi River mouth. Eastern long along-shelf transects, northern long off-shelf transects and horizontal grid transects were taken to observe water and sediment quality.These results indicated that hypoxic water spilled out and spread from these hollows mainly at the Flood tide. And the behavior of the hypoxic water tends to move to the north east direction throughout the day. Hypoxia spilled out from the dredged hollow affected to the migration of such species and it may decrease biodiversity in the Hakata Bay.