Seabased’s WEC uses a simple, ring-shaped buoy tethered by a steel and synthetic line to a power unit housed on the seabed, and based on the technology developed at Uppsala University. As the waves rise and fall, the buoy pulls up and down on a cable attached to a linear ‘translator’ — a kind of rotor — that uses a permanent or ferrite-magnet system encased in stators to generate power.
Skagerrak, North Sea, Swedish waters outside the municipality of Sotenäs and the town Smögen, 120 km N of Gothenburg, at approximately 50 m depth.
A full scale permitting process, including an Environmental Impact Assessment (EIA) and consultations, started in 2007 and in October 2009 an application was filed to the permitting body, the Environmental Court in Vänersborg. Final court negotiations took place in May 2010 and the permit was issued in July 2010. Seabased was responsible for and carried out the Environmental Impact Statement (EIS), including consultations etc., for the whole permitting process. Due to unclear competitive legislation, under the EU, the project awaited clearance from the EU for one and a half years before the project approval and start was given, which halted the project with some 18 months. A large number (15+) of additional permits/consents/licenses, from various authorities, were also required in order to enable necessary pre-construction studies, the project start itself and operation.
First phase, 1 MW (34 units), completed in early 2015.
Second phase, up to 9 MW, under negotiation during 2017-18.
Permit for operation is 20 years.
Key Environmental Issues
Although the project area was chosen carefully, in order to minimize competing interests and conflicts but without compromising with necessary siting requirements, the permit from the Environmental Court was conditioned with four “control programs” (post construction studies) regarding the marine environment: effects on the Norwegian lobster population (also a very important commercial species in the area); (benthic) fish population and behaviour changes in relation to the wave power park; eventual changes in the seabed conditions and therefore also the benthic faunal community, and finally; under water noise monitoring.
The purpose of the environmental studies being undertaken at the Sotenäs wave energy park is to follow up expected, known possible stressors/receptors, follow up new findings, and with “new” monitoring techniques. The project was conditioned with four specific study/control programs considering eventual effects from: under water noise, seabed changes, population alterations in (1) Norwegian lobster and (2) fish in general within the projects area. Seabased AB is conducting the monitoring with support from Uppsala University (coordinating) but also Swedish University of Agricultural Sciences and Gothenburg University, plus independent consultancy firms.
Environmental Webpage: https://www.seabased.com/environmental-benefits
Papers, Reports, Research Studies
Only yearly/internal reports to authorities. No final study reports, or journal publication yet released.
Baseline Assessment: Sotenäs Project
|Receptor||Study Description||Design and Methods||Results||Status|
|Marine Mammals||N/A||National statistics|
|Fish, Fisheries||Population effects/trends||Fisheries statistics||Baseline information||Completed|
|Invertebrates||Norwegian lobster population effects/trends||Fisheries statistics||Baseline information||Completed|
|Physical Environment||Wave measurements||Satellite data, during operation Datawell WaveRiderTM Buoy||Ongoing|
|Physical Environment||General baseline information of benthos||Sediment sample collection in wave park area and surrounding control areas||Baseline information||Completed|
|Human Dimensions||Marine uses/users.||National statistics|
Post-Installation Monitoring: Sotenäs Project
|Stressor||Receptor||Study Description||Design and Methods||Results||Status|
|Collision, Habitat Change||Fish||Population effects/trends||Passive sonar monitoring and complementary test fishing (nets, trawls etc.)||Ongoing|
|Collision, Habitat Change||Fish, Demersal Fish||Population effects/trends||Standardised test fishing – focus benthic fish||Planned|
|Noise||Fish, Marine Mammals||Disturbance from underwater noise||Hydrophone recording during different phases of the project (deployment, operation, maintenance etc.).||Started but halted|
|EMF, Habitat Change||Invertebrates, Fisheries||Norway lobster population effects/trends - also some other benthic invertebrate species will be able to be included||ROV equipped with video camera on standardized routes within park and control areas. |
Also, application of baited Prawn creels (inside and control areas)
|Two years of sampling performed (2016-17) within wave park area and control areas. At least two more years of sampling remain.||Ongoing|
|Habitat Change||Physical Environment, Invertebrates||Population effects/trends for benthos||Sediment sample collection in wave park area and surrounding control areas||Two years of sampling performed (2015-16) within wave park area and two control areas. At least two more years of sampling remain||Ongoing|
|Changes in Flow||Physical Environment||Wave measurements||Datawell Wave RiderTM Buoy||Ongoing|