Contaminant transport in wetland flows over bottom-layer absorption subject to wind effect

Ecological decomposition and bottom-layer absorption are omnipresent and greatly influence pollutant mass transport in natural and modeled wetland flows. In addition, it considers the force of wind that blows on the wetland’s surface. The present work analytically explores the two-dimensional and lo...

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Veröffentlicht in:Modeling earth systems and environment Jg. 11; H. 2; S. 91
Hauptverfasser: Mondal, Buddhadeb, Barman, Krishnendu, Saha, Shuvendu, Mazumder, Bijoy S.
Format: Journal Article
Sprache:Englisch
Veröffentlicht: Cham Springer International Publishing 01.04.2025
Springer Nature B.V
Schlagworte:
Absorption
Approximation
Chemistry and Earth Sciences
Computer Science
Contaminants
Decomposition
Dispersion
Drag
Earth and Environmental Science
Earth Sciences
Earth System Sciences
Ecological effects
Ecosystems
Emission analysis
Environment
Flow velocity
Fluid flow
Free surfaces
Homogenization
Mass transport
Math. Appl. in Environmental Science
Mathematical Applications in the Physical Sciences
Momentum
Momentum equation
Original Article
Physics
Pollutants
Pollution dispersion
Pollution transport
Statistics for Engineering
Surface wind
Two dimensional analysis
Two dimensional flow
Velocity
Vertical distribution
Wetlands
Wind effects
Ecological decomposition
Bottom-layer absorption
Multi-scale analysis
Contaminant transport
Dispersion
Wetlands
Wind drags
ISSN:2363-6203, 2363-6211
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Zusammenfassung:Ecological decomposition and bottom-layer absorption are omnipresent and greatly influence pollutant mass transport in natural and modeled wetland flows. In addition, it considers the force of wind that blows on the wetland’s surface. The present work analytically explores the two-dimensional and longitudinal mean concentrations under the effects of ecological decomposition, bottom-layer absorption, and wind drag force based on Mei’s homogenization technique up to third-order approximation. The flow velocity is computed from the basic momentum equation under the free-surface wind effect to understand the mechanism behind the pollutant mass transport in wetland flows. Also, from the results it seems that as wind intensity increases, it typically exerts a greater force on the fluid, enhancing the downstream flow velocity. As an extension of the Taylor dispersion model, Mei’s homogenization technique up to third-order approximation is employed for the environmental dispersion processes for the above three factors jointly considered in wetland flows. For large-time scale investing in 2-D concentration distribution, it reveals that 2-D concentration distribution is not uniform in the vertical direction. Moreover, it is concluded that the concentration of pollutants flowing through a wetland is decreased with the increase of bottom-layer absorption parameters. Also, it is seen that when decomposition rate ( ) increases, the pollutant is removed more rapidly, leading to a decrease in the longitudinal mean concentration. For pollutant emission into wetlands, this work is also analytically derived for a critical length and duration of a region influenced by pollutants.
Bibliographie:ObjectType-Article-1
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ISSN:2363-6203
2363-6211
DOI:10.1007/s40808-025-02285-3