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Metadata: 2021, Fugro, Sheringham Shoal Offshore Wind Farm, Seabed Monitoring Survey Comparison
Abstract:
Fugro was commissioned by Equinor (U.K), to undertake monitoring surveys of the Sheringham Shoal Offshore Wind Farm, export cable route, and transit route.This report provides a comparison of the results from six surveys carried out by Fugro: the 2008 pre-installation survey, winter 2013, winter 2014, winter 2015, winter 2018 and winter 2020 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 and 2020 surveys were undertaken as part of an ongoing program of preventative maintenance. Following an assessment of data collected in 2008, 2013, 2014, 2015, 2018 and 2020 the following summary conclusions have been made: - The most prominent natural seabed change since 2008 was associated with the movement of large dune bedforms in the south-east of the Wind Farm site. The largest seabed change was associated with a reduction in depths of up to 3.91 m (accretion) and increase in depths of -3.37 m (erosion). - Since 2008 a total of 19 WTG locations exhibited a seabed deepening (erosion) of over 0.5 m within a radius of 25 m from the monopiles and the surrounding rock armour. These corresponded to WTG locations A3, D5, E5, F5, F6, F7, G5, G6, G8, H4, H5, H6, H8, I6, I7, I8, J7, J8 and K8. - Since 2018 seven WTG locations (E5, F6, G6, H6, I6, J8, K8) exhibited a seabed deepening (erosion) ranging from 0.4 m and 0.9 m. Additional 12 WTG locations exhibited not significant erosion ( less than 0.3 m); these corresponded to A3, D5, F5, F7, G5, G8, H4, H5, H8, I7, I8 and J7. A further WTG location (A7) is reported to have undergone net accretion. - Within the Cromer Shoal Marine Conservation Zone (MCZ) on the export cable route one minor change in depth was seen within the trenching area since the last survey was conducted in 2018, this represented an area of erosion between 0.2 to 0.7 m. -One exposure on the eastern export cable route (B) was identified in both the 2018 and 2020 surveys; this exposure decreased from 14.9 m to 9.6 m since 2018. - Fifteen exposures were identified in the main array area in the 2020 survey, of which nine were new exposures not seen in 2018. Four exposures exhibited evidence of freespan. - Eight cable exposures were found adjacent to 8 WTG locations, all located in an area of mobile seabed sediment waveforms. These corresponded to WTG locations K8, J8, J7, I7, H6, G6, F6 and G5. Those adjacent to WTG locations J8 and G6 exhibited evidence of freespan. - Where no construction activity, trenching or sediment transport was observed, bathymetric differences were generally less than +/-0.5 m between all bathymetry surveys, as demonstrated by differences recorded at the datum square
Data holder:
The Crown Estate
Use constraints:
Kept confidential until owner and distributor agree to give public access
| Other details | ||
| Internal code | Internally assigned metadata identifier | 4942 |
| Title | The title is used to provide a brief and precise description of the dataset such as 'Date', 'Originating organisation/programme', 'Location' and 'Type of survey'. All acronyms and abbreviations should be reproduced in full. | 2021, Fugro, Sheringham Shoal Offshore Wind Farm, Seabed Monitoring Survey Comparison |
| File Identifier | The File Identifier is a code, preferably a GUID, that is globally unique and remains with the same metadata record even if the record is edited or transferred between portals or tools. | 800dcf2057cbfb471c713d0840d4371a |
| Resource Identifier | This is the code assigned by the data owner. | 201193-R004 |
| Resource type | The resource type will likely be a dataset but could also be a series (collection of datasets with a common specification) or a service. | series |
| Start date | This describes the date the resource starts. This may only be the year if month and day are not known | 2008-03-01 |
| End date | This describes the date the resource ends. This may only be the year if month and day are not known | 2020-12-29 |
| Spatial resolution | This describes the spatial resolution of the dataset or the spatial limitations of the service. | 0.25 |
| Spatial resolution unit | This describes the unit of spatial resolution which for distance must be metres. | http://standards.iso.org/ittf/PubliclyAvailableStandards/ISO_19139_Schemas/resources/uom/gmxUom.xml#m |
| Frequency of updates | This describes the frequency with which the resource is modified or updated i.e. a monitoring programme that samples once per year has a frequency that is described as 'annually'. | notPlanned |
| Abstract | The abstract provides a clear and brief statement of the content of the resource. | Fugro was commissioned by Equinor (U.K), to undertake monitoring surveys of the Sheringham Shoal Offshore Wind Farm, export cable route, and transit route.This report provides a comparison of the results from six surveys carried out by Fugro: the 2008 pre-installation survey, winter 2013, winter 2014, winter 2015, winter 2018 and winter 2020 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 and 2020 surveys were undertaken as part of an ongoing program of preventative maintenance. Following an assessment of data collected in 2008, 2013, 2014, 2015, 2018 and 2020 the following summary conclusions have been made: - The most prominent natural seabed change since 2008 was associated with the movement of large dune bedforms in the south-east of the Wind Farm site. The largest seabed change was associated with a reduction in depths of up to 3.91 m (accretion) and increase in depths of -3.37 m (erosion). - Since 2008 a total of 19 WTG locations exhibited a seabed deepening (erosion) of over 0.5 m within a radius of 25 m from the monopiles and the surrounding rock armour. These corresponded to WTG locations A3, D5, E5, F5, F6, F7, G5, G6, G8, H4, H5, H6, H8, I6, I7, I8, J7, J8 and K8. - Since 2018 seven WTG locations (E5, F6, G6, H6, I6, J8, K8) exhibited a seabed deepening (erosion) ranging from 0.4 m and 0.9 m. Additional 12 WTG locations exhibited not significant erosion ( less than 0.3 m); these corresponded to A3, D5, F5, F7, G5, G8, H4, H5, H8, I7, I8 and J7. A further WTG location (A7) is reported to have undergone net accretion. - Within the Cromer Shoal Marine Conservation Zone (MCZ) on the export cable route one minor change in depth was seen within the trenching area since the last survey was conducted in 2018, this represented an area of erosion between 0.2 to 0.7 m. -One exposure on the eastern export cable route (B) was identified in both the 2018 and 2020 surveys; this exposure decreased from 14.9 m to 9.6 m since 2018. - Fifteen exposures were identified in the main array area in the 2020 survey, of which nine were new exposures not seen in 2018. Four exposures exhibited evidence of freespan. - Eight cable exposures were found adjacent to 8 WTG locations, all located in an area of mobile seabed sediment waveforms. These corresponded to WTG locations K8, J8, J7, I7, H6, G6, F6 and G5. Those adjacent to WTG locations J8 and G6 exhibited evidence of freespan. - Where no construction activity, trenching or sediment transport was observed, bathymetric differences were generally less than +/-0.5 m between all bathymetry surveys, as demonstrated by differences recorded at the datum square |
| Lineage | Lineage includes the background information, history of the sources of data, data quality statements and methods. | verall, 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, 2018 and 2020 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 regionsâ?? 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). |
| Related keywords | ||
| Keyword | General subject area(s) associated with the resource, uses multiple controlled vocabularies | Marine Environmental Data and Information Network |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Elevation | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Geology | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Hydrography | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Land cover | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Oceanographic geographical features | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Bathymetry and Elevation | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Sound velocity and travel time in the water column | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Side-scan sonar | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Construction monitoring | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Pre-Construction monitoring | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Post-Construction monitoring | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Renewable Energy Lease area | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Offshore Cable Corridor | |
| Geographical coverage | ||
| North | The northern-most limit of the data resource in decimal degrees | 53.1828 |
| East | The eastern-most limit of the data resource in decimal degrees | 1.2316 |
| South | The southern-most limit of the data resource in decimal degrees | 52.9487 |
| West | The western-most limit of the data resource in decimal degrees | 0.8285 |
| Responsible organisations | ||
| Role | The point of contact is person or organisation with responsibility for the creation and maintenance of the metadata for the resource. | pointOfContact |
| Organisation name | ABP Marine Environmental Research Ltd | |
| Position name | Data Manager | |
| Postal code | SO14 2AQ | |
| City | Southampton | |
| Country | United Kingdom | |
| enquiries@abpmer.co.uk | ||
| URL | http://www.abpmer.co.uk | |
| Role | The originator is the person or organisation who created, collected or produced the resource. | originator |
| Organisation name | Fugro | |
| Phone | +44 (0)2392 205500 | |
| Delivery point | Victory House,Trafalgar Wharf (Unit 16), The Sawmills, Durley | |
| Postal code | PO6 4PX | |
| City | Portsmouth | |
| Unknown | ||
| URL | www.fugro.com | |
| Role | The custodian is the person or organisation that accepts responsibility for the resource and ensures appropriate care and maintenance. If a dataset has been lodged with a Data Archive Centre for maintenance then this organisation is be entered here. | custodian |
| Organisation name | The Crown Estate | |
| Phone | +44 020 7851 5000 | |
| Delivery point | 1 St James's Market | |
| Postal code | SW1Y 4AH | |
| City | London | |
| Country | United Kingdom | |
| enquiries@thecrownestate.co.uk | ||
| URL | www.thecrownestate.co.uk | |
| Resource locators | ||
| Locator URL | Web address (URL) that links to the resource | https://www.marinedataexchange.co.uk/details/3493/summary |
| Web address (URL) that links to the resource | https://www.marinedataexchange.co.uk | |
| Dataset constraints | ||
| 20 Limitations on Public Access - Access constraints | otherRestrictions | |
| 20 Limitations on Public Access - Other constraints | This states any limitations on access to the data and uses free text. | Kept confidential until owner and distributor agree to give public access |
| 21 Conditions for Access and Use - Use limitation | This states any constraints on use of the data. Multiple conditions can be recorded for different parts of the data resource. If no conditions apply, then `No condtions apply` is recorded. This uses free text. | https://www.marinedataexchange.co.uk/content/info/faq |
| Version info | ||
| Date of publication | The publication date of the resource or if previously unpublished the date that the resource was made publicly available via the MEDIN network. | 2021-05-20 |
| Harvest date | The date which this record has been (re)harvested from the provider. | 2026-04-19 |
| Metadata date | The date when the content of this metadata record was last updated. | 2021-08-18 |
| Metadata standard name | The name of the metadata standard used to create this metadata | MEDIN Discovery metadata standard |
| Metadata standard version | The version of the MEDIN Discovery Metadata Standard used to create the metadata record | 2.3.8 |