Bureau Waardenburg
Varkensmarkt 9
4101 CK Culemborg
the Netherlands
T: +31 (0) 345 512710
email buwa

Aangroei op turbinepalen OWEZ

Research into the effects of Offshore Wind Farm Egmond aan Zee (OWEZ)

Growth of underwater life on wind turbines

In 2008 and 2011 we assessed the underwater life on the monopile foundations and the rocks around the base of the foundations that serve as scour protection. The assessments were based on video footage, pictures and samples collected by divers at three different wind turbines.

A total of 55 taxa (including several non-indigenous) were identified on the monopiles and 35 species on the rocks of the scour protection layers. The new hard substrate communities can form a valuable food source for fish and bird species.

The interim report and and the final report are also available from the Noordzeewind website.

Bureau Waardenburg has a number of professional divers and is involved with a range of offshore and marine research including Marine Mammal Observers, Drop-cam video surveys of the seafloor, Biodiversity on ship wrecks, Bird studies.

From 2013, the Bureau Waardenburg professional divers will be fully certified for diving at offshore installations (Surface supplied, IMCA and HSE approved).

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Growth on a monopile in the Offshore Windfarm Egmond aan Zee during February (left) and September (right).

The intertidal zone is generally characterised by a band of green algae, different species of barnacles, several oysters and small mussels. Generally a thick layer of adult mussels was present from the shallow subtidal zone to circa 10-12 m depth. From circa 12 to the seafloor at circa 15 m depth, the monopiles were fully covered by small crustaceans, anemones (plumose, orange and Sargartia spp.) and ringed tubularia.