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Published in:
2021 | OriginalPaper | Chapter
Field Measurements of Fine Sediment Transport Processes in Japanese Estuaries
Author : Yasuyuki Nakagawa
Published in: Proceedings of the 3rd International Conference on Sustainability in Civil Engineering
Publisher: Springer Singapore
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Abstract
This paper presents some case studies of field measurements for better understanding of fine sediment transport processes in Japanese estuarine environments, including the inner Tokyo bay and the mouth of Shinanno river. The study at the Tokyo bay focused on the near bed transport processes of muddy bottom sediments and the monitoring has been captured a storm event with resuspension of muddy bottom sediments during a passage of Typhoon. The results of the sediment budget analysis with the monitored data shows the importance of the fluid mud flow near the bed. The other field study at the mouth of the Shinano river also demonstrates an importance of the fluid mud formation and their transport for the shoaling process of a dredged navigation channel in the water area. The area shows a specific flow system during a flood event with vertical three-layered stratification, where a discharged fresh turbid water flows over the sea water and the fluid mud layer formed in the lowest on the bottom.