LAUSR

Abstract The flow module of the Delft3D model is used to investigate the hydrodynamics of the flow at Ebrie Lagoon. The simulations are carried out for both the flood and low water conditions along the lagoon tributaries over a complete tidal cycle. After the due model validation, the breakdown of energy along the vertical and horizontal is performed. It has been noted that the values of the turbulent energy are generally weak over the whole lagoon. However, slight Spatio-temporal variations were noted in areas near the main estuary that undergoes the direct impact of the tides regardless of the regimes of the tributaries. These values increase with the depth and show apparent variations along the whole tidal cycle. Away from the main estuary, precisely at the mouths of the tributaries, the turbulent energy is also very high. During the low tides (weak flows), the turbulent energy is also weak and tends to decrease with the depth. During the floods, it displays the opposite behaviour. These results are quite crucial because they allow one to locate the suitable areas for biologic production and hence fisheries management in the lagoon.