3d9ddcfa-af99-4c31-b881-8749abe53e76 English series series 2026-04-07T15:19:34 MEDIN 3.1.2 biota oceans Acoustic noise in the water column SeaDataNet Parameter Discovery Vocabulary 2023-12-12 revision Cetacean behaviour SeaDataNet Parameter Discovery Vocabulary 2023-12-12 revision Seal behaviour SeaDataNet Parameter Discovery Vocabulary 2023-12-12 revision Fish behaviour SeaDataNet Parameter Discovery Vocabulary 2023-12-12 revision Consenting The Crown Estate Renewable Energy Development Phases 2012-05-15 revision Zone search area The Crown Estate Renewable Energy Development Areas 2012-05-15 revision Production and industrial facilities GEMET - INSPIRE themes, version 1.0 2009-07-31 revision 3700 SeaDataNet sea areas 2012-11-07 revision Irish Sea and St. George's Channel SeaVoX Vertical Co-ordinate Coverages 2020-05-21 revision water column 2013-09-10T00:00:00 2014-11-21T23:59:59 -5.0537 -3.6694 53.4913 53.9755 TCE-2676 Marine Data Exchange 2013-2014, Subacoustech, Zone 9 - Celtic Array, Noise Assessment Noise Assessment 2014-09-01T00:00:00 creation 2021-05-17T14:23:49 publication English Subacoustech Environmental Ltd carried out a detailed noise assessment for the proposed Rhiannon Wind Farm (RWF) on behalf of Centrica. This assessment forms Chapter 9 and 11 of the Stage 2 Preliminary Environmental Information (Stage 2 PEI) of the Rhiannon Offshore Wind Farm, which is part of the Environmental Impact Assessment (EIA). Analysis and modelling of underwater noise at various stages of the life-cycle of the developments were considered. For the underwater environment the source of noise relevant to construction and operational life were considered. A combination of bespoke software models and database information – gathered from monitoring at many previous wind farm constructions were used to produce these results. The results were presented using various metrics, capturing both the behavioural and the possible injurious nature of sounds. The results were also presented for the relevant range of fish and marine mammals. From a behavioural perspective each species has been considered separately since the noise will have a different impact on species due to the differing perceptions of noise caused by their differing hearing capabilities. Ranges and areas of influence were given without relationship to actual population distributions. Underwater noise components for the four aspects of the lifecycle of the build: Baseline, pre-construction; Construction phase; and Operational phase were considered. The cumulative effects of noise in terms of how multiple potential sources of noise could be integrated in terms of their environmental impact were considered where possible, as well as the cumulative effects of the influence of nearby wind farms. Also decommissioning was considered briefly, although a further impact assessment will most likely be required nearer the time. 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 Subacoustech Environmental Ltd Technical Director tim.mason@subacoustech.com originator The Crown Estate +44 020 7851 5000 enquiries@thecrownestate.co.uk distributor Celtic Array info@celticarray.com owner weekly Delimited Documents Geographic Information System https://www.marinedataexchange.co.uk/details/TCE-2676/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 The approach to the assessment of noise for the Rhiannon Offshore Windfarm was to use models and computer simulation augmented, where possible, by measurements taken in situ. Details of the approaches were given in detail in subsequent chapters. Here it is sufficient to highlight that the validated models used are able to give two types of output: • The level of noise received at a point given a particular type of construction methodology; • The potential effect of this noise, whether it be behavioural or based on injury for specific species. These calculations were then considered as a bridge to further assessment for the actual effect of noise on local animal distributions. The discussion of details of underwater noise and its measurement and descriptors in Appendix A,. was provided to aid in the assessment and understanding of the results provided in Section 4 of the report . please note that noise, sound and vibration was referred to as ‘noise’ throughout the report. And for the assessments to be made in this report, vibration did not have a long range effect (more than a few hundred metres). The detailed modelling of short range effect (up to one or two thousands of metres) of vibrations travelling through the substrate and affecting bottom dwelling animals, such as crustaceans, were not been considered in detail, primarily due to the paucity of information concerning the effect of vibration on benthic life Celtic Array GIS and Data Manager info@celticarray.com pointOfContact EPSG Geodetic Parameter Registry 2022-11-29 revision WGS 84