Numerical simulation of velocity distribution and pollution retention in flexible submerged vegetated channel

Bai, Yu; Zhao, Yufeng; Huang, Lu; Shen, Dandan; Sun, Guojin

doi:10.1016/j.jhydrol.2023.130265

Cited by 3 publications

(4 citation statements)

References 72 publications

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Section: Resultssupporting

confidence: 94%

“…Due to a certain degree of randomness, although the trend of pollutant concentration does not change, the concentration between each point is not a smooth curve, but there are certain fluctuations. This is consistent with previous research [35]. The simulation diagram of pollutant transport is shown in Figure 4, and it can be seen that the simulation accuracy is very high.…”

Section: Resultssupporting

confidence: 91%

“…Finally, by counting the total number of pollutant particles at different heights, the vertical distribution pattern of the pollutant concentration is given. The random displacement method can be used to simulate the convective diffusion process of particles in fluids, and due to its high accuracy, it is often used to simulate the diffusion of pollutants in rivers [35]. The random displacement method is applied to the simulation of pollutant transport in a multi-layer vegetated channel, and the equation to simulate the particle position is expressed as follows [36]:…”

Section: Pollution Transport Modelmentioning

confidence: 99%

See 2 more Smart Citations

A Numerical Model of the Pollutant Transport in Rivers with Multi-Layer Rigid Vegetation

Xuan,

Yang,

et al. 2024

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River water pollution is a key environmental issue to human society. How to effectively simulate the flow velocity and pollution transport in a vegetated river can provide a theoretical basis for solving such problems. Based on previous experimental data, this article uses the lattice Boltzmann method and random displacement method to simulate the velocity distribution and nutrient transport in multi-layer rigid vegetated rivers. The simulation results indicate that incorporating the drag force of the vegetation into the model according to different vegetation layers can effectively simulate the velocity in a multi-layer vegetated river. Incorporating the turbulent diffusion and mechanical diffusion effects of nutrients caused by vegetation into the model can effectively simulate the effects of multi-layer vegetation on nutrient transport. This model can provide effective predictions of the flow velocity and pollution transport in multi-layer vegetation.

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Section: Resultssupporting

confidence: 94%

Section: Resultssupporting

confidence: 91%

Section: Pollution Transport Modelmentioning

confidence: 99%

See 1 more Smart Citation

A Numerical Model of the Pollutant Transport in Rivers with Multi-Layer Rigid Vegetation

Xuan,

Yang,

et al. 2024

Water

Self Cite

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“…This model has good capture ability for the control flow dynamics of both rigid and flexible vegetation canopies. Yu B et al [21] used the Lattice-Boltzmann method to simulate the hydrodynamics of flexible vegetation channels. It was found that vegetation types and average flow velocity have a significant impact on pollutant interception efficiency.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Influence of Reed Vegetation on the Hydraulic Characteristics of the Huai River Inflow Channel

Zhang,

Cheng,

Zhang

et al. 2024

Water

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When there is vegetation on the beach or main channel bed, it will have a significant impact on the river channel. This study was based on physical model experiments to investigate the flow conditions of the Jinhu section of the Huaihe River estuary, revealing the influence of reed vegetation on water flow resistance. A new comprehensive roughness formula was proposed, and the predictive effectiveness of the formula was verified. The theoretical results indicate that under the condition of vegetation not being submerged, the comprehensive roughness is directly proportional to the square root of vegetation density in areas with vegetation coverage, the square root of water surface vegetation coverage, and the 2/3 power of the hydraulic radius. The bottom slope does not affect it. Under the condition of vegetation inundation, the comprehensive roughness is smaller than that under the condition of no inundation. The experimental prediction results of the influence of reeds on roughness indicate that the measured roughness values and theoretical roughness calculation values are in good agreement. Under the same operating conditions, the roughness gradually decreases with an increase in flow rate. Under the full-reed working condition, the calculated roughness value and the measured roughness value have the same trend of change, both decreasing with the increase in flow rate. The experimental prediction results of the influence of reeds on the relationship between water level and flow rate show that the roughness value of 0 increases with the increase in reed grass surface coverage rate Ki, and an increase in Ki can lead to an increase in comprehensive roughness.

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Effects of land use patterns on seasonal water quality in Chinese basins at multiple temporal and spatial scales

Yao,

Zeng,

Duan

et al. 2024

Ecological Indicators

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Numerical simulation of velocity distribution and pollution retention in flexible submerged vegetated channel

Cited by 3 publications

References 72 publications

A Numerical Model of the Pollutant Transport in Rivers with Multi-Layer Rigid Vegetation

A Numerical Model of the Pollutant Transport in Rivers with Multi-Layer Rigid Vegetation

Investigation of the Influence of Reed Vegetation on the Hydraulic Characteristics of the Huai River Inflow Channel

Effects of land use patterns on seasonal water quality in Chinese basins at multiple temporal and spatial scales

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