Workpackage I1 : Pilot application of sediment realocation within the system to 'reset' a natural system for bank nourishment in Port of Rotterdam

This investment will consist in managing and monitoring dredging and reallocation of 200.000 tons of sediment within the river in Port of Rotterdam (Contribution to main output : 1 new solution / 200 000 t sediment reused / 200 000t raw material saved). To reallocate 200 000 t of sediment, 500 000 m3 of sediment must be dredged from a clean part of the port, not impacting the erosion/sedimentation rate in the harbour. Reallocated sediment must be traceable within the inter tidal area and coastal zone to establish a nourishing impact on the river bank and coast. To do so, the sediment origin has to be distinguishable from the mostly marine sediments in this part of harbour. Specific and dedicated dredging have to be done. To face the needed of extra transport distance to guaranty fluvial (non marine) sediments, a hopper will be rented. The hopper rental cost (a 584 kEuro investments) is not claimed within the project.  Deltares and Port of R’dam will work together to cover the procedure to get the necessary permits, planning activities in conjunction with other port maintenance projects, prepare and carry out the field surveys during and after the reallocation, do lab experiments to determine which processes impact the settling and sediment strength development, present the results as input for other WPs.

Activities

Port of Rotterdam, with the support of Deltares, will work to obtain the authorisation to experiment sediment realocation in the port for the pilot. This work will use field survey of current system status (T0) and impact assessment of the implementation and detailed workplan and planning.

Port of Rotterdam and Deltares will work to manage together the implementation of the pilot site, to coordinate operators onsite, and get operational feedback linked to implementation works to link with replication condition analyses in workpackage T2 and workpackage Long Term Effect.

Deltares & Port of R’Dam, with ARMINES, CIT, BRGM expertise support, will monitor the processes occurring in the pilot site.

Project partners will:

- characterise sediment properties for the change in physical and chemical sediment composition;

- monitor the site impact of the application of sediments and the critical environmental parameters for erosion and flooding.

Ongoing results will be used in workpackage T2 to set up roll-out conditions and initiate WPLTE activities. Final results will be used for final documents.