Several important lessons were learned during the execution of the dredging works, concerning the workability of the design and the consequences of creating a specific landscape as compared with a case without predefined bedforms:

  1. Make sure that there is sufficient data on bathymetry, sediment properties, local currents and tidal windows. This is essential information for contractors to determine their dredging strategy.
  2. Involve the contractors early in the design phase, so that the final design fits easily into the dredging plans and methods and can therefore be created cost-effectively, i.e. with a minimum loss of productivity. Use their knowledge on sediment properties, ship types, planning and general dredging expertise when designing and planning the location.
  3. Make the decision on landscaping as early as possible and provide data on requirements and/or locations so that the contractors can fit the bedform creation into their dredging plans and therefore also in the permits.
  4. Maintain an open communication with contractors / dredger captains to determine the actual workability of the design and to discuss the need for any optimisations;
  5. If the scope of the project and /or available fleet of TSHDs changes, confer with contractor to determine if the design needs to be adapted (e.g. concerning dredging depths).