The salt marshes can be found at the edges of the Eastern Scheldt. They are located outside the dykes and have become higher than silts because of the rising ground level. They are therefore not flooded every day and are only under water at spring tides. The salt water does however enter the salt marsh every day via deep channels.
As a result, the salt marshes have a salty character and the vegetation consists of salt-loving plants. These are not plants that love salt; they manage to live with the high salt content with special adaptations. Coastal birds breed on the salt marshes, such as terns and plovers. In addition, they also act as a high-water flight site for birds who seek food on the plates and silts at low tide.
A large part of the salt marshes is located behind the compartmentalisation dams, where the salt tides of the Eastern Scheldt no longer have any influence. As a result, they have become wild and forested and have lost their value as breeding sites for coastal birds. In addition, the salt marshes located in the Eastern Scheldt are threatened by erosion. Due to the reduced supply of building materials, virtually no recovery is taking place.