Development of Risk Prediction Methods for Coastal Marine Environments with Tidal Flats due to Global Warming

2023 Fiscal Year Final Research Report

• Project/Area Number: 19KK0380
• Research Category: Fund for the Promotion of Joint International Research (Fostering Joint International Research (A))
• Allocation Type: Multi-year Fund
• Research Field: Hydraulic engineering
• Research Institution: Fukuoka Institute of Technology (2023); Kyushu University (2019-2022)
• Principal Investigator: Tai Akira 福岡工業大学, 社会環境学部, 准教授 (20585921)
• Project Period (FY): 2020 – 2023
• Keywords: 干潟 / 土砂輸送 / 地球温暖化

Outline of Final Research Achievements

In simulations of sediment transport, which are crucial for tidal flats, tidal currents are often the only factor considered, and there are few studies that include the effects of waves. Therefore, in this study, a coupled model of tidal currents and waves was applied to the Ariake Sea. Using a coupled model that integrates the Regional Ocean Modeling System (ROMS) with a wave estimation model, sediment transport simulations were conducted. The results showed that considering both tidal currents and waves produced results that were closer to actual field observations compared to when only tidal currents were considered. Furthermore, although most of the research period coincided with travel restrictions due to the coronavirus, which shortened travel periods, we were able to supplement the implementation of collaborative research through online meetings and discussions via email.

Free Research Field

土木水工学

Academic Significance and Societal Importance of the Research Achievements

本研究は，地球温暖化による干潟を有する沿岸海洋環境のリスク予測手法の開発に関して，波と流れの共存場における座標軸に応じたレイノルズ応力の変化，三次元広域土砂動態計算にもとづいた 河川出水に伴う干潟の泥質化機構の解明，気候予測データベースd4PDFに基づく九州地方の降雨及び河川流量の将来変化特性についてなどについて検討を行い成果を学術論文に発表した．