The Minho and Lima estuaries comprise important and sensitive protected areas valuable for species and habitats conservation, constituting a reference for ecotoxicological and water quality studies. These estuaries, separated only by 20 km, are very productive systems with high metabolic rates that strongly influence the cycle of nutrients and the ecology of NW Iberian coast. This study aims to understand the propagation of Minho and Lima estuarine plumes in order to investigate the effects of buoyancy on the interaction between dissolved substances emitted by their outflows and its impacts on regional productivity. Using the Delft3D model, a deeper analysis of the intrusion and dynamics of outflows of these adjacent estuaries was performed, through the simulation of trajectories of passive tracers emitted in each estuary, considering river discharges and wind stress. The results show an interaction between these estuaries, both during the summer and the winter seasons. Both estuarine outflows tend to move southward in response to the predominant north wind in the summer season, while in winter the opposite is observed. The northward outflows tend to be transported very close to the coastline, while the southward and westward is diverted offshore. The estuarine outflows interaction promotes exchanges of physical-chemical properties and nutrients between these estuaries, generating ecological advantages for the smaller one. These results showed that the numerical model used accurately describes the dynamical processes in these estuarine systems, being essential for a proper assessment of the effects of forcing drivers and providing relevant information for coastal zone planning and management.

米尼奥河和利马河口包括对物种和栖息地保护有价值的重要和敏感​​保护区，构成生态毒理学和水质研究的参考。这些河口仅相隔 20 公里，是具有高代谢率的高产系统，对营养物质循环和伊比利亚西北部海岸的生态产生强烈影响。本研究旨在了解 Minho 和 Lima 河口羽流的传播，以研究浮力对其流出物排放的溶解物质之间相互作用的影响及其对区域生产力的影响。使用 Delft3D 模型，通过模拟每个河口排放的被动示踪剂的轨迹，对这些相邻河口的入侵和流出的动态进行了更深入的分析，考虑河流流量和风应力。结果表明，这些河口在夏季和冬季都存在相互作用。由于夏季主要的北风，两个河口出流都倾向于向南移动，而在冬季观察到相反的情况。向北流出的水流往往非常靠近海岸线，而向南和向西流向离岸分流。河口流出相互作用促进了这些河口之间的物理化学性质和营养物质的交换，为较小的河口产生生态优势。这些结果表明所使用的数值模型准确地描述了这些河口系统中的动力过程，