scholarly journals Tidal asymmetry and residual circulation over linear sandbanks and their implication on sediment transport: A process-oriented numerical study

2007 ◽  
Vol 112 (C12) ◽  
Author(s):  
Rosario Sanay ◽  
George Voulgaris ◽  
John C. Warner
Keyword(s):  
Sediment Transport ◽  
Numerical Study ◽  
Tidal Asymmetry ◽  
Residual Circulation ◽  
Process Oriented

Tidal asymmetry in the Sylt-Romo Bight, south-eastern North Sea

2020 ◽  
Author(s):  
Vera Fofonova ◽  
Alexey Androsov ◽  
Lasse Sander ◽  
Ivan Kuznetsov ◽  
Felipe Amorim ◽  
...  
Keyword(s):  
Circulation Pattern ◽  
Tidal Energy ◽  
Tidal Asymmetry ◽  
Residual Circulation ◽  
Linear Processes ◽  
Bathymetric Data ◽  
Full Analysis ◽  
Bathymetric Map

<p> </p><p>The study is dedicated to the tidal dynamics in the Sylt-Rømø Bight with a focus on the non-linear processes. The FESOM-C model was used as the numerical tool, which works with triangular, rectangular or mixed grids and is equipped with a wetting/drying option. As the model’s success at resolving currents largely depends on the quality of the bathymetric data, we have created a new bathymetric map for an area based on recent studies of Lister Deep, Lister Ley, and the Højer and Rømø Deep areas. This new bathymetric product made it feasible to work with high resolution grids (up to 2 m in the wetting/drying zone). As a result, we were able to study the tidal energy transformation and the role of higher harmonics in the domain in detail. The tidal ellipses, maximum tidally-induced velocities, energy fluxes and residual circulation maps were constructed and analysed for the entire bight. Additionally, tidal asymmetry maps were introduced and constructed. The full analysis was performed on two grids with different structures and showed a convergence of the results as well as fulfillment of the energy balance. The tidal residual circulation and asymmetric tidal cycles largely define the circulation pattern, transport and accumulation of sediment and the distribution of bedforms in the bight, therefore the results are necessary and useful benchmarks for further studies in the area, including baroclinic and sediment dynamics investigations.</p>

A numerical study of sediment transport and event bed genesis during tropical storm Delia

1993 ◽  
Vol 98 (C3) ◽  
pp. 4775-4791 ◽  
Author(s):  
Timothy R. Keen ◽  
Rudy L. Slingerland
Keyword(s):  
Sediment Transport ◽  
Numerical Study ◽  
Tropical Storm

The influence of changes in tidal asymmetry on residual sediment transport in the Western Scheldt

2010 ◽  
Vol 30 (8) ◽  
pp. 871-882 ◽  
Author(s):  
Annelies Bolle ◽  
Zheng Bing Wang ◽  
Carl Amos ◽  
John De Ronde
Keyword(s):  
Sediment Transport ◽  
Tidal Asymmetry

scholarly journals Numerical study of sediment transport in Thu-Bon estuary and coastal areas of Hoi-An City

2022 ◽  
Vol 964 (1) ◽  
pp. 012001
Author(s):  
Nguyen Thong ◽  
Ho Tuan Duc ◽  
Phan Quang Hung ◽  
Tran Hai Yen
Keyword(s):  
Sediment Transport ◽  
Numerical Study ◽  
Monsoon Season ◽  
Sand Dunes ◽  
Coastal Areas ◽  
Main Trend ◽  
North Coast ◽  
Northeast Monsoon ◽  
The North ◽  
Depth Study

Abstract The area of Cua-Dai estuary and the coastal areas of Hoi-An City have experienced complicated erosion and sedimentation in recent years. Along the coast of Hoi-An, erosion often occurs, whereas in the area of Cua-Dai River, there is an accretion phenomenon that obstructs the waterway navigation from Cua-Dai to Cu-Lao-Cham. Occurrence of sand dunes in the offshore location of Cua-Dai has been recorded at a number of times in recent years. Studying the process of bed morphological change due to the sediment transport in the Thu-Bon river and the influence of monsoons in the area allows to explain the above phenomenon thus an in-depth study to propose appropriate solutions. This study used the numerical model Telemac which combines the hydro-morphodynamic and wave modules. The simulation results show that the main trend of coastal currents caused by tides and waves tends to go southward, leading to coastal erosion especially in the northeast monsoon season as well as sedimentation in the estuarine area. In addition, the model also shows the crucial role of waves in shoreline erosion, with the degree of erosion in the north coast near Cua-Dai being more severe than the southern coast, through the formation of local eddy flow on the north coast.

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