The Scheldt estuary is 160 km long and runs though the Netherlands and Belgium from the estuary up to the locks in Ghent. Its basin, including tributaries Rupel, Durme, Dender, ... has a surface of 21.000 km². Due to the connection to the North Sea the tidal effects are sensible deep inland. The amount of water running in and out of the Scheldt daily and its flow rate largely determines morphological changes in the system. Tides, water levels, management and wave action are closely monitored. On top of that, research on the influence of rising sea levels, flood risks... is also carried out.