a2b1fea6-6dff-46a7-a38c-f2afc1c5ce1b eng series ABP Marine Environmental Research Ltd +44 023 8071 1840 Quayside Suite, Medina Chambers Southampton SO14 2AQ United Kingdom enquiries@abpmer.co.uk http://www.abpmer.co.uk pointOfContact 2020-07-20 MEDIN Discovery Profile 2.3.8 urn:ogc:def:crs:EPSG::32631 2019, Fugro, Sheringham Shoal Offshore Wind Farm, Seabed Monitoring Survey Comparison 2015-03-23 publication 4500153674 Fugro was commissioned by Equinor (U.K), to undertake monitoring surveys of the Sheringham Shoal Offshore Wind Farm, export cable route, and transit route. The report in this series provides a comparison of the results from five surveys carried out by Fugro; the 2008 pre-installation survey, winter 2013, winter 2014, winter 2015 and winter 2018 monitoring surveys. The 2008 survey was a full pre-construction geophysical and hydrographic survey and provided a baseline for an assessment of changes that may have resulted from the construction of the Wind Farm infrastructure. The 2013, 2014, 2015 surveys were carried out in order to meet the requirements for site monitoring as set out in MMO Licence L/2011/00153/16. The 2018 survey was undertaken as part of an ongoing program of preventative maintenance. The Crown Estate +44 020 7851 5000 1 St James's Market London SW1Y 4AH United Kingdom enquiries@thecrownestate.co.uk www.thecrownestate.co.uk custodian Fugro +44 (0)2392 205500 Victory House,Trafalgar Wharf (Unit 16) The Sawmills Durley Portsmouth Hampshire PO6 4PX United Kingdom unknown www.fugro.com originator notPlanned Post-Construction monitoring The Crown Estate Renewable Energy Development Phases 2012-05-15 revision 1 Offshore Cable Corridor Pre-Construction monitoring Construction monitoring Renewable Energy Lease area Bathymetry and Elevation Side-scan sonar Sound velocity and travel time in the water column Marine Environmental Data and Information Network Marine Environmental Data and Information Network http://www.marinedataexchange.co.uk/pages/terms-of-use.aspx copyright otherRestrictions copyright otherRestrictions http://www.marinedataexchange.co.uk/pages/terms-of-use.aspx http://www.marinedataexchange.co.uk/pages/terms-of-use.aspx eng elevation geoscientificInformation 0.828491 1.231625 52.948708 53.182847 2008-03-01 2018-11-23 series Overall, the quality of the MBES data acquired by Fugro on the Sheringham Shoal Wind Farm improved from the 2008 baseline survey to the 2013, 2014, 2015 and 2018 monitoring surveys. All survey data collected exceeded the specified quality requirements. The improvement in data quality over this time period was due to continued improvements in MBES data resolution and positioning accuracy, alongside refinements in the processing methodology. Fewer motion artefacts were present in data collected since 2013, which resulted in a cleaner data set and improved resolution of fine scale features (such as seabed dunes less than 0.1 metre high). In addition, this also ensured that the bathymetric difference grids were more precise. This was apparent in areas where no movement of the seafloor had occurred. In these regions’ vertical differences between all three surveys were less than +/-0.2 m. Therefore, changes of less than 0.3 m were not considered significant, when assessing areas of erosion or accretion. The SSS data were acquired using the same equipment and employed the same processing methodology each year and therefore did not exhibit any significant changes; although some of the interpretation criteria differed between surveys due to different project objectives (as detailed in Sections 1.1 and 3.2.1). https://www.marinedataexchange.co.uk/details/1987/summary A link to the web service or dataset. https://www.marinedataexchange.co.uk A link to the general host site.