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Large

scale effects

scale environmental effects of tidal energy extraction in the Eastern Scheldt storm surge barrier

 

Tidal energy will become much more important in the future renewable energy mix. In the Netherlands several tidal energy pilots are present. One of these locations is the Eastern Scheldt storm surge barrier, which provides a unique location where tidal velocities are locally enhanced due to the presence of the barrier. Five turbines were installed in one of the openings of the barrier in 2015 by Tocardo.

The construction of the storm surge barrier has led to sand hunger within the basin and erosion of the tidal flats. The tidal flats are important for coastal protection, local ecology, recreation, shipping and fishery. Implementation of more turbines is expected to lead to an additional deterioration in tidal flat area, which is undesirable.

    

The research questions which have been formulated are:

What predictions can be made on

  1. What are the governing processes of tidal flat development since the construction of the storm surge barrier?
  2. What is the influence of tidal energy extraction on the governing processes
involved
  1. in tidal flat development
based on scientific knowledge
  1. ?
 
  2. How can
a model be calibrated such that it accurately represents these processes to verify these predictions
  1. modeling tools be applied to accurately represent the influence of tidal energy extraction on the hydrodynamics and morphodynamic processes?
  2. How
can the momentum extraction due to tidal turbines adequately be parametrized such that there is a realistic representation of the change in hydrodynamics?

  • What are acceptable values for thrust forcing due to tidal turbines and their possible configurations for tidal flat erosion rates?

    1. are the hydrodynamics affected with increasing tidal energy extraction and different positioning of tidal turbine arrays?
    2. How are the sediment dynamics affected with increasing tidal energy extraction and different positioning of tidal turbine arrays?

    3. Which tidal energy extraction scenarios can be implemented such that their combined effects remain below the threshold of acceptable erosion rates? 

    In which scenarios would the Tocardo turbines have acceptably small influences on erosion rates?

    Currently literature review is still being performed

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    Info:

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    Metadata list
    || Name | Kamilla Guijt  ||
|| Email | Kamilla.Guijt@Deltares.nl ||
|| Room | Tetra, 2nd floor |
|| Software package | Delft3D |
|| Start Date | 01-03-2017|
|| Specialisation Programme | Hydraulic Engineering |
|| Deltares supervisor | Arnout Bijlsma 
 Anton de Fockert |
|| TU Delft supervisor |  Zheng Bing Wang 
 Bram van Prooijen 
 Robert Jan Labeur  |