Numerical modelling of tidal turbines in the vicinity of a weir: Application to the Eastern Scheldt barrier

Tidal energy has a large potential to contribute to achieving the sustainability goals in the Netherlands, due to the long coastline and many estuaries. The investment costs for the implementation of offshore tidal energy are however, still a drawback. A possibility to lower the investment costs for tidal energy is to implement tidal energy...

Mixing of salinity by ship traffic in canals

Salt intrusion poses a threat to the fresh water supply function of inland waterways. How far inland salt intrusion reaches is dependent on a balance of buoyancy forcing, water depth, discharge of the canal and the amount of mixing. Wind, bottom roughness, and sailing ships contribute to mixing. Currently, little is known about the contribution...

Undular bottom topography as a salt intrusion mitigation measure: A study on the potential of trapped internal waves to enhance vertical mixing

Due to climate change and human interventions, saltwater intrusion is becoming a topic of increasing concern worldwide. Salt water intrudes into the Rotterdam Waterway (RWW) by an exchange flow, where the denser sea water propagates landwards at the bottom. The main competing mechanism for this stratified exchange flow is...

Gravity Based Foundation: Scour and design optimisation

Within Royal HaskoningDHV an innovative concept is thought to be feasible as a new foundation for larger wind turbines in deeper waters. In this thesis the development of this innovative offshore wind turbine foundation was aided. The research focused on two topics: - Scour at this gravity based foundations. - Possible design optimisations with...

Hydrodynamic loading on the shaft of a gravity based offshore wind turbine

Gravity based support structure By a joint venture of BAM and Van Oord an innovative type of Gravity Based Structure (GBS) for an offshore wind turbine was developed. The GBS consist of a concrete caisson and a steel shaft. The applicable water depth range is between 35 and 60m. Hydrodynamic loading on the shaft In order to optimize the support...

Dichtheidsstroming en bodemligging achter de extra spuisluis in de Afsluitdijk

Door het uitmonden van verschillende rivieren in het IJsselmeer is er een permanente aanvoer van water. Een groot deel van het aangevoerde water wordt onder verval met spuisluizen in de Afsluitdijk afgevoerd. De capaciteit van deze spuisluizen is niet meer voldoende. Dit is het gevolg van groeiende pieken in de aanvoer van water naar het...