<p>In the context of a growing offshore wind energy sector, the multiplication of wind turbine foundations in the marine environment has raised concerns about the potential environmental impact of metallic elements, particularly aluminium, released from their Galvanic Anode Cathodic Protection (GACP) systems. To assess the potential effects of a chemical element, the common approach of a risk analysis is to compare a threshold below which no biological impact is expected against the Predicted Environmental Concentration (PEC). To evaluate these risks prior to the widespread deployment of these GACP systems, we propose a methodology for estimating a realistic PEC. This approach utilises a fully three-dimensional numerical configuration implemented in the Coastal and Regional Ocean Community (CROCO) model. The dispersion of dissolved aluminium is investigated in the case study of the Gulf of Lion, in relation to regional hydrodynamics, taking into account inputs from galvanic anode degradation as well as contributions from rivers and other natural sources that may lead to elevated concentrations.</p>

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Numerical modelling of dissolved aluminium dispersion from floating wind farm cathodic protection in the gulf of lion

  • Nicolas Michelet,
  • Vincent Faure,
  • Matthieu Dussauze,
  • Christelle Caplat,
  • Georges Safi

摘要

In the context of a growing offshore wind energy sector, the multiplication of wind turbine foundations in the marine environment has raised concerns about the potential environmental impact of metallic elements, particularly aluminium, released from their Galvanic Anode Cathodic Protection (GACP) systems. To assess the potential effects of a chemical element, the common approach of a risk analysis is to compare a threshold below which no biological impact is expected against the Predicted Environmental Concentration (PEC). To evaluate these risks prior to the widespread deployment of these GACP systems, we propose a methodology for estimating a realistic PEC. This approach utilises a fully three-dimensional numerical configuration implemented in the Coastal and Regional Ocean Community (CROCO) model. The dispersion of dissolved aluminium is investigated in the case study of the Gulf of Lion, in relation to regional hydrodynamics, taking into account inputs from galvanic anode degradation as well as contributions from rivers and other natural sources that may lead to elevated concentrations.