We simulate numerically the interaction of river influxes with tidal propagation in regions of varying complexity for the Scheldt basin (river, tributaries and estuary) and the European continental shelf. While the computational domain for rivers is one-dimensional and extends up to the limit of tidal influence, the estuary and shelf region are dealt by two-dimensional equations. Within this region, a hydraulic structure in one of the tributaries is implemented to simulate the bidirectional flow of the tide. The coupled model was first calibrated for a quiet period and then extensively validated using available measurements for simulations in the month of January (2021) that involves storm surges. Moreover, the shelf region of the model was compared with the existing literature for the harmonic analysis of the dominant M2 tide. The simulated sea level elevation exhibits an RMS error smaller than 0.3 meters.
