6dac652e-a824-43ea-8031-35004d6e51b8 English series series 2026-07-15T10:37:35 MEDIN 3.1.2 oceans Acoustic noise in the water column SeaDataNet Parameter Discovery Vocabulary 2026-06-19 revision Construction monitoring The Crown Estate Renewable Energy Development Phases 2012-05-15 revision Research The Crown Estate Renewable Energy Development Phases 2012-05-15 revision Research and Development Activity The Crown Estate Renewable Energy Development Areas 2012-05-15 revision Species distribution GEMET - INSPIRE themes, version 1.0 2009-07-31 revision SeaVoX Vertical Co-ordinate Coverages 2020-05-21 revision water column 2008-04-22T23:00:00 2008-04-22T23:00:00 -5.69 -5.5 54.35 54.6 TCE-261 Marine Data Exchange 2008, Subacoustech, COWRIE Research, Assessment of background underwater noise from pin pile drilling Assessment of background underwater noise from pin pile drilling 2008-01-01T00:00:00 creation 2021-05-17T13:33:53 publication English This report has been prepared by Subacoustech Ltd for COWRIE. This report details a series of underwater noise measurements undertaken during drilling operations for the pin piles used to secure the quadropod base of the SeaGen tidal turbine device in Strangford Lough, Northern Ireland. The results have been interpreted in terms of the potential impact this noise may have on marine species. Background noise measurements were also undertaken during periods when the drilling was not being carried out to determine pre-existing ambient underwater noise levels in the region. It had been intended to include measurements of underwater noise generated by high pressure water jet cutting at the Strangford Lough site. The installation procedure for the construction project however, was changed and this technique was not required Origin: Subacoustech Ltd There will be no limitations when published on the Marine Data Exchange otherRestrictions Data Must be used in accordance to the Marine Data Exchange's Terms of Use: https://www.marinedataexchange.co.uk/content/info/terms-of-use otherRestrictions The Crown Estate +44 020 7851 5000 enquiries@thecrownestate.co.uk custodian Dr J Nedwell Subacoustech Ltd +44 (0)1946 814463 jeremy.nedwell@subacoustech.com originator The Crown Estate +44 020 7851 5000 enquiries@thecrownestate.co.uk distributor COWRIE cowrie@offshorewind.co.uk owner notPlanned Documents https://www.marinedataexchange.co.uk/details/TCE-261/summary A link to the web service or dataset. https://www.marinedataexchange.co.uk A link to the general host site. Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services 2010-12-08T00:00:00 publication Conformity with the Commission Regulation (EU) No 1089/2010 was either not relevant to this dataset or not a requirement of the Marine Data Exchange for the creation and submission of this dataset; therefore, conformity has not been assessed and cannot be declared False series Measurements of background underwater noise during periods when no drilling was being carried out have indicated high levels of high frequency background noise are present in the Strangford Narrows region of Strangford Lough. It is thought that this is due to the high speed of tidal flow in the region generating noise by interaction of turbulent water with the sea bed and at the water surface. Measurements at ranges of 28 m to 2130 m from the drilling operation indicated that the unweighted, one second RMS Sound Pressure Levels varied from 105 to 139 dB re. 1 μPa. A fit to the measured data has indicated a Source Level for the drilling noise of 162 dB re. 1 μPa @ 1 m. The levels of underwater noise from the drilling operation are comparable with small vessel noise, and considerably lower than the levels of noise generated by other piling techniques such as impact piling or vibro-piling. Subacoustech Ltd Dr J Nedwell 02380711840 jeremy.nedwell@subacoustech.com pointOfContact EPSG Geodetic Parameter Registry 2022-11-29 revision WGS 84