Sediment is an important asset of the trilareral Wadden Sea. For nature and for human demands. In the three countries there is a lot of knowledge and knowhow about the behaviour of sediment (sand and mud) and the management of it. The Programme towards a rich Wadden Sea took the initiative to start a Community of Understanding (CoU) Sediment Solutions. The Common Wadden Sea Secretariat, Deltares, Rijkswaterstaat and more and more people and organizations of the trilateral Wadden Sea get involved. The CoU itself is still under development. Events like webinars helps to identify shared interests and the best way to move forward, also related to the existing organizational structures of trilateral cooperation. This webpage and its subpages is for now the spot where shared information in the CoU will be available.