Tracking Marine Debris in Northwest Spain

This research article investigates the influence of wind on the accumulation patterns of plastic debris transported by the Ulla River into the Ría de Arousa, an estuary in Northwest Spain. The study employs Lagrangian particle tracking models to assess how varying wind conditions affect the distribution and beaching of floating particles. It details the methodology used for simulations, including the evaluation of spatial and seasonal patterns of particle concentration and residence time. The findings indicate that lower wind conditions lead to greater near-shore accumulation and longer residence times, particularly in the northern regions of the estuary. Conversely, increased wind influence results in intensified particle dispersion, reducing overall accumulation and weakening correlations between river discharge and coastal deposition. Seasonal variations are also highlighted, with higher concentrations observed in the north during winter and in the south during summer. This work contributes to a better understanding of pollutant transport and aids in developing effective mitigation strategies.