Numerical Simulation of Tidal Current and Sediment Movement in the Sea Area near Weifang Port
Abstract
:1. Introduction
2. Numerical Models
2.1. Hydrodynamic Model
2.2. Wave Model
2.3. Suspended-Sediment-Transport Model
2.3.1. Sediment-Settling Velocity
2.3.2. Bottom Reference Concentration
2.3.3. Sediment-Diffusion Coefficient
2.4. Model Coupling
3. Study Area and Model Settings
3.1. Study Area
3.2. Model Settings
4. Model Results and Analysis
4.1. Tide Elevation and Tidal-Current Verification
4.2. Suspended Sediment Concentration Verification
4.3. Sediment-Content Comparison
5. Conclusions
- (1)
- After introducing settling-velocity Formula (6), the overall settling velocity of the sediment decreased. The higher the sediment concentration is, the more the settling velocity is tempered. The sediment in the bottom water body was more highly concentrated than that in the surface water body. The SSC in the bottom layer was high and fluctuated more. After the introduction of settling-velocity Formula (6), the model fitted the measured data better. Hence, the model can effectively describe the sediment-movement process in the sea area near Weifang Port.
- (2)
- The SSCs simulated by settling-velocity Formula (6) were higher than those simulated by settling-velocity Formula (3), and the SSCs simulated by the two formulas differed more when the current velocity was faster. With settling-velocity Formula (6), the overall settling velocity of the sediment was slower than that simulated by settling-velocity Formula (3). When the current velocity was high, more sediment was suspended, the suspended sediment settled less easily, and the SSCs in the water body increased and fluctuated more.
- (3)
- For the SSC field in the sea area of Weifang Port, the nearshore SSCs calculated by settling-velocity Formula (6) were higher than those calculated by settling-velocity Formula (3). Specifically, the nearshore SSCs in the surface and bottom layers calculated by settling-velocity Formula (6) were approximately 1 kg/m3 and 2 kg/m3 higher, respectively than those calculated by settling-velocity Formula (3). In practical engineering applications, the SSCs calculated by a settling-velocity formula considering gradation will be even higher, so a construction scheme with a higher safety factor is recommended for the study area.
Author Contributions
Funding
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Station Number | Beijing54 | WGS84 | ||
---|---|---|---|---|
x | y | E | N | |
1 | 429,431.5 | 4,134,252 | 119.2 | 37.34 |
2 | 433,521.9 | 4,132,544 | 119.25 | 37.32 |
3 | 437,045.2 | 4,130,220 | 119.29 | 37.30 |
4 | 431,003.2 | 4,128,988 | 119.22 | 37.29 |
5 | 428,060.5 | 4,124,240 | 119.19 | 37.25 |
6 | 428,809.7 | 4,124,215 | 119.20 | 37.25 |
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Qi, J.; Jing, Y.; Chen, C.; Zhang, J. Numerical Simulation of Tidal Current and Sediment Movement in the Sea Area near Weifang Port. Water 2023, 15, 2516. https://doi.org/10.3390/w15142516
Qi J, Jing Y, Chen C, Zhang J. Numerical Simulation of Tidal Current and Sediment Movement in the Sea Area near Weifang Port. Water. 2023; 15(14):2516. https://doi.org/10.3390/w15142516
Chicago/Turabian StyleQi, Jiarui, Yige Jing, Chao Chen, and Jinfeng Zhang. 2023. "Numerical Simulation of Tidal Current and Sediment Movement in the Sea Area near Weifang Port" Water 15, no. 14: 2516. https://doi.org/10.3390/w15142516