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

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.

scholarly journals Numerical Study of Remote Sensed Dredging Impacts on the Suspended Sediment Transport in China’s Largest Freshwater Lake

Water ◽  
2019 ◽  
Vol 11 (12) ◽  
pp. 2449 ◽  
Author(s):  
Jianzhong Lu ◽  
Haijun Li ◽  
Xiaoling Chen ◽  
Dong Liang
Keyword(s):  
Remote Sensing ◽  
Sediment Transport ◽  
Suspended Sediment ◽  
Transport Model ◽  
Poyang Lake ◽  
Numerical Study ◽  
Point Sources ◽  
Freshwater Lake ◽  
Suspended Sediment Transport ◽  
Sediment Transport Model

As the largest freshwater lake in China, Poyang Lake plays an important role in the ecosystem of the Yangtze River watershed. The high suspended sediment concentration (SSC) has been an increasingly significant problem under the influence of extensive sand dredging. In this study, a hydrodynamic model integrated with the two-dimensional sediment transport model was built for Poyang Lake, considering sand dredging activities detected from satellite images. The sediment transport model was set with point sources of sand dredging, and fully calibrated and validated by observed hydrological data and remote sensing results. Simulations under different dredging intensities were implemented to investigate the impacts of the spatiotemporal variation of the SSC. The results indicated that areas significantly affected by sand dredging were located in the north of the lake and along the waterway, with a total affected area of about 730 km2, and this was one of the main factors causing high turbidity in the northern part of the lake. The SSC in the northern area increased, showing a spatial pattern in which the SSC varied from high to low from south to north along the main channel, which indicated close agreement with the results captured by remote sensing. In summary, this study quantified the influence of human induced activities on sediment transport for the lake aquatic ecosystem, which could help us to better understand the water quality and manage water resources.

Numerical study of sediment transport time scales in an ebb-dominated waterway

2020 ◽  
Vol 591 ◽  
pp. 125299 ◽  
Author(s):  
Lei Zhu ◽  
Wenping Gong ◽  
Heng Zhang ◽  
Weihao Huang ◽  
Rui Zhang
Keyword(s):  
Sediment Transport ◽  
Time Scales ◽  
Numerical Study ◽  
Transport Time

scholarly journals Numerical Study of the Hydrodynamic and Sediment Transport Process in a Subtropical Water Reservoir: the Impacts of Storms and Winds

2020 ◽  
Vol 25 (6) ◽  
pp. 843-860
Author(s):  
Xinchen Wang ◽  
Hong Zhang ◽  
Edoardo Bertone ◽  
Rodney A. Stewart ◽  
Kelvin O’Halloran
Keyword(s):  
Sediment Transport ◽  
Transport Process ◽  
Numerical Study ◽  
Water Reservoir ◽  
Subtropical Water
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