739a052fe37c54be81e183eae86e9bc3 English series BioConsult Georg Nehls BioConsult SH Brinkmannstr 31 25813 Husum Germany pointOfContact 2009-05-07 MEDIN Discovery Metadata Standard Version 2.3.5 urn:ogc:def:crs:EPSG::4326 OGP 2007, COWRIE, Assessment and costs of potential engineering solutions for the mitigation of the impacts of underwater noise arising from the construction of offshore windfarms 2007-09-01 publication 2007-01-01 creation 3229 http://data.offshorewind.co.uk/ This reports reviews the possibilities to mitigate the noise arising from pile driving for the construction of offshore windfarms. It analyses mitigation measures which have been applied in related projects and assesses their applicability to offshore pile driving. Based on this, suggestions for new mitigation measures are made. The report identifies two methods which are promising to be both applicable and effective in reducing underwater noise arising from offshore pile driving. Both methods are considered to be generally compatible to the working processes at sea. Although further engineering work would be needed, they could be brought into practice within a few months. It is concluded, that noise mitigation measures offer good opportunities to reduce the impacts of underwater noise arising from the construction of offshore windfarms. For the offshore industry, noise mitigation may prove to be beneficial as their application may allow construction works in areas and times when restrictions are needed to protect sensitive species. BioConsult-SH George Nehls +49 (0) 48 41 - 66 32 9 - 10 +49 (0) 48 41 - 66 32 9 - 19 Schobueller Str. 36 Husum 25813 Germany info@bioconsult-sh.de http://bioconsult-sh.de/en/ originator The Crown Estate +44 020 7851 5000 16 New Burlington Place London W1S 2HX United Kingdom enquiries@thecrownestate.co.uk http://www.thecrownestate.co.uk custodian Klaus Betke Institut für technische und angewandte Physik GmbH +49 (0)441 570610 +49 (0)441 5706110 Marie-Curie-Straße 8 Germany info@itap.de http://www.itap.de originator notPlanned pdf Marine Environmental Data and Information Network Metadata record availability 2012-01-11T07:46:54 revision Research Research and Development Activity The Crown Estate Renewable Energy Development Phases 2012-05-15T02:00:03 revision Fish behaviour Cetacean behaviour Seal behaviour Sound velocity and travel time in the water column Acoustic noise in the water column SeaDataNet Parameter Discovery Vocabulary 2017-10-18 revision 104 no conditions apply eng environment -9.33312855790775 2.68743327033997 49.0399981037863 60.7672028638749 2007-09 2007-09 Origin: BioConsult, ITAP, MENCK and Baugesellschaft http://www.marinedataexchange.co.uk/search?q=#fq=fq%3DProject%253Amdecowrie108 download https://www.marinedataexchange.co.uk/details/266/summary A link to the web service or dataset. https://www.marinedataexchange.co.uk A link to the general host site. dataset This reports reviews the possibilities to mitigate the noise arising from pile driving for the construction of offshore windfarms. It analyses mitigation measures which have been applied in related projects and assesses their applicability to offshore pile driving. Based on this, suggestions for new mitigation measures are made. The report identifies two methods which are promising to be both applicable and effective in reducing underwater noise arising from offshore pile driving. Both methods are considered to be generally compatible to the working processes at sea. Although further engineering work would be needed, they could be brought into practice within a few months. Based on measurements of offshore pile driving, noise emissions of large piles are estimated to reach peak levels of 201-205 dB re 1μPa and sound exposure levels SEL of 175-178 dB re 1μPa at a distance of 500 m. Noise produced from offshore pile driving may be harmful and disturbing to marine wildlife. From literature data it is inferred, that physical impairment may occur above levels (SEL) of 180 dB re 1μPa. As a first proxy for disturbance of marine mammals, the report refers to a level of 140 dB re 1μPa.