MONITORING OF CHANNEL SEDIMENTATION AT A DEEP SEA PORT IN SOUTHEASTERN PORTION OF BANGLADESH DUE TO ON-GOING CONSTRUCTION

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  • バングラデシュ南東部に建設中の深海港における航路埋没モニタリング
  • バングラデシュ ナントウブ ニ ケンセツ チュウ ノ シンカイコウ ニ オケル コウロ マイボツ モニタリング

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Abstract

<p> The full-scale port facility construction has just commenced in Matarbari coal-fired power plant project since Jan/2018. This paper describes the characteristics of sedimentation inside the channel during the dredging process based on the obtained construction data. Results of monthly bathymetric survey show a remarkable sedimentation in the channel during monsoon season from the months of May to September. This observation is found to be in good agreement with the initial simulaion results of sedimentation inside the channel. It is also confirmed through wave and turbidity observations that a signif-icant sedimentation occurs in the channel due to the high turbidity outside the port especially when high waves and spring tide coincide. Furthermore, a silt-clay content in the sediment is found to be dominant inside the port and data on mud thickness was then obtained which can provide useful information for channel management in the future. Moreover, the scouring around the outer structure of the port is one of the important components of site monitoring and a remarkable scouring at the tip of the north sediment mitigation dike is confirmed.</p>

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