2388369a-8a82-4575-9483-33033cb6e3f2 English series series 2026-09-10T10:43:45 MEDIN 3.1.2 oceans Acoustic noise in the water column SeaDataNet Parameter Discovery Vocabulary 2026-06-19 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 Land use GEMET - INSPIRE themes, version 1.0 2009-07-31 revision SeaDataNet sea areas 2012-11-07 revision North Sea SeaVoX Vertical Co-ordinate Coverages 2020-05-21 revision water column 2010-01-01T00:00:00 2011-12-31T23:59:59 -2.902705 -2.569394 58.068017 58.319742 CES-353 Marine Data Exchange 2011, Subacoustech, Zone 1 - Moray Firth, Noise Modelling Survey 2026-09-10T10:43:45 publication English Modelling was undertaken to provide a prediction of the likely extent of impacts on marine fauna. The impacts are calculated as a result of underwater noise generated during the predicted events during construction and operation of the Moray Offshore Windfarm. The general approach to estimating the levels of subsea noise from offshore wind farm developments has been undertaken in two phases. In the first a broad-brush modelling approach has been used to rank order a wide range of offshore wind farm-related sources of underwater noise. This was done using the proprietary Simple Propagation Estimator And Ranking model (SPEAR) developed specifically for the Moray Firth developers. In the main, the information used to validate this model has come from the very substantial database of recordings of various noise sources compiled by Subacoustech Environmental over the last 20 years. Phase 2: (Recordings at six locations at MORL development) Impact piling is known to generate high levels of underwater noise. It is therefore important to make an accurate estimate of its likely level so that its impact can be accurately assessed. There are a variety of acoustic models for the estimation of underwater noise propagation in coastal and offshore regions, mainly developed as a result of military interests. However, the authors are not aware of any underwater broadband noise propagation models suitable for the much shallower environments typical of wind farm construction, or for the highly impulsive time histories encountered from impact piling. In these environments and with these source types there is a greater capacity for underwater sound to be affected by absorptive processes in the seabed, resulting in propagation losses which typically increase with frequency but decrease with depth. The series present a full set of dBht contours and noise allocations per 4x4km grid square for the marine mammal impact assessment: · Scenario 1 is just piling at location 1 · Scenario 2 is piling at location 1 and 5 · Scenario 3 is piling at all 6 MORL locations · Scenario 4 is piling at all 6 MORL locations and locations A and B for BOWL. 'Extent' is for the piling locations for the study. 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 Crown Estate Scotland +44 (0)131 260 6070 enquiries@crownestatescotland.com custodian Richard Barham Subacoustech Environmental Ltd. Consultant +44 (0)1489 892 881 richard.barham@subacoustech.com originator Crown Estate Scotland +44 (0)131 260 6070 enquiries@crownestatescotland.com distributor Rebecca Hughes EDP Renewables GIS & Data Manager 0131 556 7602 rebecca.hughes@edpr.com owner asNeeded Delimited Geographic Information System https://www.marinedataexchange.co.uk/details/CES-353/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 Location information for the study (e.g. piling locations) was provided to Subacoustech Ltd by Moray Offshore Renewables Limited (MORL). Subacoustech carried out the work under contract to MORL. Output data contributed to noise impact assessments produced by Natural Power. Rebecca Hughes EDP Renewables GIS & Data Manager 0131 556 7602 rebecca.hughes@edpr.com pointOfContact EPSG Geodetic Parameter Registry 2022-12-12 revision WGS 84 / UTM zone 30N