RTE - Saint Nazaire wind farm connection: ecological monitoring of the connection during operation, monitoring of benthic populations in soft and rocky environments, monitoring of riprap, monitoring of sediment and water quality. Year 1/2023, September 2024
Description
RTE is responsible for connecting the offshore wind farm off Saint Nazaire built by EDF Renouvelables in 2021-2022. In order to comply with ISO 14001 certification and sustainable environmental protection, RTE has set up monitoring systems to establish a baseline condition, as well as monitoring during the construction work, both at the landfall and along the connection. These operations are governed by the Prefectoral decree No. 2016/BPUP/072 concerning authorization under Article L.214-3 of the French Environment Code, and include: monitoring of benthic populations on soft and rocky substrates; monitoring of sediment quality; monitoring of water quality. Now that the work has been completed, the process enters a new phase during operation of the wind farm. The monitoring to be carried out during this phase should enable us to characterize the long-term dynamics of the environment's return to equilibrium, and to take into account the factors that explain variability outside the effect of the connection. The protocols were established and validated at the Environmental Technical Committee (ETC) meeting on April 14, 2021, and the periodicity was validated at the ETC meeting on May 3, 2022. Along the connection, monitoring during the operational phase will be carried out in 2023 and 2024, and will focus on sediment and water quality, as well as the monitoring of loose and rocky substrates and riprap where it has not been possible to embed the cable. Observations made during these monitoring campaigns will then be compared with the baseline condition achieved in 2020, as well as with the post-construction monitoring campaigns carried out in 2021 for rocky substrates and in 2022 for loose substrates. This report describes the sampling campaigns carried out to conduct the various monitoring programs, as well as the results of this monitoring in 2023
Abstract (French)
RTE a a sa charge de raccorder le parc eolien en mer au large de Saint Nazaire construit par EDF Renouvelables en 2021-2022. Afin de respecter la certification ISO 14001 et la protection durable de l'environnement, RTE a mis en place des suivis afin de realiser un etat de reference mais egalement des suivis pendant les travaux tant au niveau de l'atterrage que le long du raccordement. Ces operations sont encadrees par l'Arrete Prefectoral No. 2016/BPUP/072 portant sur l'autorisation au titre de l'article L.214-3 du code de l'environnement et ils comprennent: Un suivi des peuplements benthiques sur substrats meubles et sur substrats rocheux; Un suivi de la qualite des sediments; Un suivi de la qualite de l'eau. Les travaux desormais termines, le processus rentre dans une nouvelle phase pendant l'exploitation du parc eolien. Les suivis qui devront etre realises au cours de cette phase devront permettre de caracteriser sur le long terme la dynamique de retour a l'equilibre du milieu et la prise en compte des facteurs explicatifs de la variabilite hors effet du raccordement. Les protocoles ont ete etablis et valides lors du Comite technique Environnemental (CTE) du 14 avril 2021 et les periodicites ont ete validees lors du CTE du 03/05/2022. Le long du raccordement, les suivis en phase d'exploitation seront realises en 2023 et 2024 et concerneront la qualite des sediments et de l'eau ainsi que le suivi des peuplements meubles et rocheux et des enrochements ou un ensouillage du cable n'a pas ete possible. Les observations faites au cours de ces suivis seront ensuite compares a l'etat de reference realise en 2020 ainsi qu'aux suivis post travaux realises en 2021 pour les substrats rocheux et en 2022 pour les substrats meubles. Le present rapport expose les campagnes de prelevements realises pour effectuer les differents suivis ainsi que les resultats de ces suivis en 2023
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Additional details
Additional titles
- Original title (French)
- RTE - Raccordement du parc eolien de Saint Nazaire: suivi ecologique du raccordement en phase d'exploitation, suivi des peuplements benthiques en milieu meuble et rocheux, suivi des enrochements, suivi de la qualite des sediments et de l'eau. Annee 1/2023, Septembre 2024
Publishing Information
- Imprint Pagination
- 161 p.
- Report number
- INIS-FR--25-0275
INIS
- Country of Publication
- France
- Country of Input or Organization
- France
- Subject category
- S54: ENVIRONMENTAL SCIENCES; S17: WIND ENERGY;
- Descriptors DEI
- WIND TURBINE ARRAYS; OFFSHORE SITES; ENVIRONMENTAL IMPACTS; QUALITY CONTROL; SEDIMENTS; SPECIES DIVERSITY; SAMPLING; SITE CHARACTERIZATION; BENTHOS; GRAIN SIZE; MOLLUSCS; POPULATION DENSITY; WATER QUALITY
- Descriptors DEC
- ANIMALS; AQUATIC ORGANISMS; CONTROL; ENVIRONMENTAL QUALITY; INVERTEBRATES; MICROSTRUCTURE; SIZE
Optional Information
- Notes
- Available from the INIS Liaison Officer for France, see the INIS website for current contact and E-mail addresses