论文摘要
Lagoonal tidal inlets are a typical morphology of the Central Coast of Vietnam. Recently, navigation channels in these inlets have become increasingly threatened by siltation. This study analyses the relations between sediment distribution and transport trends（using the technique of Sediment Trend Analysis-STAs） in the lagoonal system of the De Gi inlet and then proposes appropriate countermeasures against sand deposition in the navigation channel. The STA identified three types of transport trends in the De Gi inlet, namely dynamic equilibrium, net accretion, and net erosion. Processes associated with the tidal prism have resulted in trends of sediment transport and deposition across the flood and ebb tidal shoals, which maintain a present cross-sectional area of about 1000 m2. However, longshore sediment transport from north to south resulting from northeast waves cause additional sand deposition in the channel. In addition, the effects of refraction associated with a nearby headland and jetty also increase sedimentation. These processes provide the main reasons for sediment deposition in the De Gi inlet. Short term and regular dredging helps to maintain the navigation channel. A system comprised of three jetties（north, south, and weir） is necessary to ensure the longterm cross-sectional stability of the navigation channel.
论文目录
文章来源
类型: 期刊论文
作者: Do Minh Duc,Tran Thanh Tung,Patrick Mc Laren,Tran Ngoc Anh,Dinh Thi Quynh
来源: International Journal of Sediment Research 2019年04期
年度: 2019
分类: 工程科技Ⅱ辑,基础科学
专业: 地球物理学,水利水电工程
单位: Faculty of Geology, VNU University of Science, Vietnam National University,Faculty of Marine and Coastal Engineering, Thuyloi University,Faculty of Meteorology, Hydrology and Oceanography, VNU University of Science, Vietnam National University
基金: the People’s Committee and concerned departments of Binh Dinh province for their valuable support for this study
分类号: TV148
页码: 322-334
总页数: 13
文件大小: 6770K
下载量: 1
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