Follow-up measures

Monitoring of avifauna by terrestrial radar

Objectives and methodology

As the offshore radar can only be functional when the wind turbines are energized, monitoring by terrestrial radar was set up before and during construction.

Specific monitoring was implemented to assess micro/macro avoidance as well as migratory flows within the park during the operational phase (see avifauna monitoring sheet by maritime radar).

The main objectives of this monitoring of avifauna by terrestrial radar were to evaluate potential changes in the behavior of seabirds due to the presence of the park and to measure the migratory flow in order to better understand the importance of the passages. in the bay of Saint-Brieuc.

A radar system was installed on the Cap Fréhel site (point of the coast closest to the park) during the two main bird migration periods (April and October).

For each monitoring, the radar system (vertical mode and horizontal mode) continuously measured migratory flows and flight heights over a period of one week.