High-resolution hydrodynamics modeling for managing coastal bay
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This work investigates the hydrodynamic response of a semi-open bay with micro-tidal dynamics, is located in the Ebro Delta (NW Mediterranean Sea) Fangar Bay, in order to solve the problems affecting mussel farms, such as the impact of freshwater discharges from multiple planting areas containing potential pollutants or nutrients on aquaculture areas, causing change of salinity field the decline in production and the limited water renewal that causes anoxia within the bay. Using the TELEMAC 3D model, we preliminarily included the internal and external forces affecting the bay's hydrodynamics (i.e, meteorological forcing, river fluxes, regional hydrodynamics provided by CMEMS products). The model achieved a relatively high-resolution grid (20 m) and completed the preliminary verification of temperature and salinity in the profile, as well as water residence study in the summer period, analyse the local flushing time for the bay mouth, aquatic area and the top of the bay. Also, by modifying the flow of these drainage channels, increasing the arrival of freshwater to solver problem of water renewal. In addition, explored the impact of these increases in freshwater flows on the salinity profiles and fields of the bay in particularly on aquatic areas. Results demonstrate feasibility of altering freshwater discharge and contribution to reducing residence time.