Tidal wetlands act as critical interfaces between terrestrial and aquatic ecosystems, influencing nutrient cycling, water quality, pollutant mitigation, and biodiversity. Solute transport in these systems is strongly affected by unsteady wind and tidal effects, which are not yet fully understood. This study presents a novel mathematical model using Mei's homogenization technique to analyze reactive solute transport under varying wind dynamics and vegetation densities, including both reversible and irreversible reactions. Results show that the wind direction and pulsation frequency significantly alter flow and solute dispersion: forward wind enhances spreading, whereas backward wind induces accumulation. Vegetation stabilizes flow, dampening wind-induced oscillations and restricting dispersion. A critical wind strength for minimal dispersion under opposing wind is identified, dependent on reaction and retention effects. Higher Damköhler numbers shift the solute centroid upstream and amplify concentration gradients, while increased vegetation improves transverse uniformity. These findings provide insights for wetland conservation, pollutant management, and water quality preservation. The strong agreement of the present solution with existing analytical models validates the approach and supports future studies on multi-pollutant transport and sediment interactions in wetlands.
Hossain et al. (Sat,) studied this question.
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