Developing a 3D Hydrodynamic and Water Quality Model for Floating Treatment Wetlands to Study the Flow Structure and Nutrient Removal Performance of Different Configurations

Wang, Yan; Gao, Xueping; Sun, Bowen; Liu, Yuan

doi:10.3390/su14127495

Cited by 5 publications

(2 citation statements)

References 27 publications

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“…Water quality models provide useful interpretations and effective evaluation and management alternatives using numerical models. The EFDC model was shown to have excellent applicability in many studies [19][20][21][22][23][24]. However, they cannot reproduce the benthic flux phenomenon that changes over space and time.…”

Section: Introductionmentioning

confidence: 99%

An Improved Model for Water Quality Management Accounting for the Spatiotemporal Benthic Flux Rate

Kim

Park

2023

Water

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Although water quality models provide useful interpretations for water quality management, it is critical to accurately input and simulate the flux rate, which varies with space and time. In the Environmental Fluid Dynamics Code model, the flux rate value set does not consider spatiotemporal variability. The water quality of the Saemangeum freshwater lake in Korea is poor despite quality improvement measures. In this study, the model was improved by considering the characteristics of flux rates that change spatiotemporally based on environmental conditions and factors influencing the benthic layer. An exponential relational expression was generated and applied to the model while considering the aerobic, anaerobic, and influencing factors. Results from four important sites in the Saemangeum Reservoir were compared with the RSR, %Difference, and AME results of the previous model for evaluating the reproducibility of the improved model. Calibration and verification of the model were performed in 2013 and 2016, respectively. The improved model yielded values close to the optimal value after computing the evaluation functions of both models. It had excellent reproducibility and simulated water quality by reflecting a reasonable value for the benthic flux rate. The improved model can be extended to evaluate other water bodies in the future.

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Section: Introductionmentioning

confidence: 99%

An Improved Model for Water Quality Management Accounting for the Spatiotemporal Benthic Flux Rate

Kim

Park

2023

Water

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“…The utilization of simulation models transcends the scope of flow optimization. Wang et al (2022) directed their attention toward water quality control and feed management, applying a 3D hydrodynamic model to anticipate the repercussions of water exchange rates. In another example, Ruiz-Velazco et al…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation study of flow patterns in shrimp pond due to aerator layout for shrimp harvesting machine application

2023

ANRES

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Importance of the work: Efficient shrimp harvesting may be enhanced using a centrifugal force technique for aerator placement optimization in Pacific white shrimp ponds. Objectives: To examine the influence of diverse aerator layouts on shrimp harvesting efficiency in the specified ponds. Materials & Methods: Three prevalent aerator layouts were examined: Type A (4-spiral and 4-wheeled paddle aerators), Type B (4 cross-shaped middle cages), and Type C (4 15-wheeled paddle aerators). The velocity and sediment aggregation efficiency were analyzed using the SolidWorks Flow Simulation software and a drop particle function. Model accuracy was validated by comparing actual water velocity measurements with the simulation results. Results: The analysis presented a strong concurrence between the real and simulated data, substantiating the precision of the simulation model in replicating the water flow characteristics in the investigated shrimp pond layouts. The highest water velocity of 21.396 cm/s was produced by the Type C aerator layout positioned at 0.5 m below the water surface, whereas the Type A layout, situated at 1.5 m depth, produced the lowest water velocity of 0.978 cm/s. The particle study revealed the superior particle collection efficiency of Type C, reaching 91% and surpassing the other layouts. These findings emphasized the significant of the aerator's location within the pond, with the Type C layout being the most effective in terms of water flow and particle collection. Main finding: This research highlighted the importance of optimizing aerator layouts in Pacific white shrimp ponds for improved water circulation dynamics and enhanced shrimp harvesting efficiency. The Type C layout achieved the highest practical collection efficiency of 91%, contributing to sustainable aquaculture practices.

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Modeling mass removal and sediment deposition in stormwater ponds using floating treatment islands: a computational approach

Xavier,

Janzen,

Nepf

2023

Environ Sci Pollut Res

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Floating Treatment Islands (FTIs) offers effective solutions for stormwater management, providing ood attenuation and pollutant removal capabilities. However, there remains a knowledge gap concerning their performance, speci cally in terms of pollutant removal and sediment deposition. To address this gap, the present study employs Computational Fluid Dynamics (CFD) modeling to investigate the intricate interactions within FTI systems. Various FTI con gurations are analyzed, considering mass removal through FTIs and sediment deposition. The ndings demonstrate that FTIs have a signi cant in uence on ow patterns and mass removal. Notably, FTIs enhance mass removal compared to the control case, with larger sediment particles exhibiting higher removal rates. The correlation between the short-circuit index and sedimentation in FTI ponds highlights the potential of FTIs as indicators of treatment e ciency. Furthermore, the study focuses on mass removal exclusively through the FTI root zones. The positioning of FTIs within the pond has a considerable impact, resulting in differences of up to 20% in mass removal. Moreover, the FTI con guration exerts a more pronounced in uence on mass removal through FTIs than through sediment deposition alone. In cases where both processes occur simultaneously, the presence of FTIs lead to higher mass removal, primarily attributed to the FTIs themselves, particularly in the initial segment. Remarkably, certain FTI con gurations enable mass removal exceeding 70% for large sediment particles, even with a pond length less than half of the original.

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Developing a 3D Hydrodynamic and Water Quality Model for Floating Treatment Wetlands to Study the Flow Structure and Nutrient Removal Performance of Different Configurations

Cited by 5 publications

References 27 publications

An Improved Model for Water Quality Management Accounting for the Spatiotemporal Benthic Flux Rate

An Improved Model for Water Quality Management Accounting for the Spatiotemporal Benthic Flux Rate

Numerical simulation study of flow patterns in shrimp pond due to aerator layout for shrimp harvesting machine application

Modeling mass removal and sediment deposition in stormwater ponds using floating treatment islands: a computational approach

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