© OpenStreetMap contributors
- Add External Layer
- Upload Shapefile
- Layer Tutorial
- Close
Use the checkbox () to show or hide a layer.
Use the radio buttons () to select a layer to use with the identify function.
- Layers
- Opacity
Available layers
(ctrl+c)
Search for marine data across UK organisations
- API
- How-To
- About
- Contact MEDIN
- Share
Metadata: 2004, Envision Mapping Ltd, Lynn, Lincs and Inner Dowsing Offshore Windfarms, Sabellaria Spinulosa Survey
Abstract:
This project presents survey information to determine seabed conditions pre- and post-construction for three offshore wind farms off the Lincolnshire coast (Lincs, Lynn and Inner Dowsing). This report presents the survey results and analysis of the pre-construction phase. The purpose of the survey was to:- • Identify the occurrence of Sabellaria spinulosa and, if present, describe the extent of development of reef communities likely to be of conservation importance; • Identify of other benthic habitats that might be sensitive to the construction and operation of wind farms; • Provide a baseline from which the effects of construction can be assessed, especially on any Sabellaria spinulosa; • Survey the seabed bathymetry. The survey strategy stipulated that grab sampling was to be avoided where reefs were detected. No substantial reef structures were detected on the sidescan sonar and this permitted a more representative grab sampling program. 30 samples were taken for sediment size and infauna. The infauna were analysed using multivariate techniques and trend analysis in a geographic information system (GIS). The sediments were classed into categories and these used to classify the AGDS data. One of the ‘sediment’ classes was the biogenic sediment Sabellaria spinulosa tubes. The classification predicted that the location most likely to support Sabellaria spinulosa reef was at the margin of the stony/gravel shoal. Although no substantial Sabellaria spinulosa reefs were found, dense aggregations were observed and the predicted distribution of habitats most likely to support this biogenic habitat, derived from the interpretation of the acoustic data, lay on the eastern margin of the Lynn, Lincs and Inner Dowsing sites. This also coincided with high species diversity. The majority of the shallow gravel shoal which makes up the proposed wind farm sites support low to moderate diversity epifaunal biotopes typical of the southern North Sea and are of low conservation significance when taken in their wider geographic context.
Data holder:
Centrica Renewable Energy Ltd
Use constraints:
http://www.marinedataexchange.co.uk/pages/terms-of-use.aspx
| Other details | ||
| Internal code | Internally assigned metadata identifier | 4442 |
| 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. | 2004, Envision Mapping Ltd, Lynn, Lincs and Inner Dowsing Offshore Windfarms, Sabellaria Spinulosa Survey |
| 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. | 2256bd633e0459e68888012151ce79c8 |
| Resource Identifier | This is the code assigned by the data owner. | 3176 |
| 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 | 2004-09-01 |
| End date | This describes the date the resource ends. This may only be the year if month and day are not known | 2004-11-30 |
| 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. | This project presents survey information to determine seabed conditions pre- and post-construction for three offshore wind farms off the Lincolnshire coast (Lincs, Lynn and Inner Dowsing). This report presents the survey results and analysis of the pre-construction phase. The purpose of the survey was to:- • Identify the occurrence of Sabellaria spinulosa and, if present, describe the extent of development of reef communities likely to be of conservation importance; • Identify of other benthic habitats that might be sensitive to the construction and operation of wind farms; • Provide a baseline from which the effects of construction can be assessed, especially on any Sabellaria spinulosa; • Survey the seabed bathymetry. The survey strategy stipulated that grab sampling was to be avoided where reefs were detected. No substantial reef structures were detected on the sidescan sonar and this permitted a more representative grab sampling program. 30 samples were taken for sediment size and infauna. The infauna were analysed using multivariate techniques and trend analysis in a geographic information system (GIS). The sediments were classed into categories and these used to classify the AGDS data. One of the ‘sediment’ classes was the biogenic sediment Sabellaria spinulosa tubes. The classification predicted that the location most likely to support Sabellaria spinulosa reef was at the margin of the stony/gravel shoal. Although no substantial Sabellaria spinulosa reefs were found, dense aggregations were observed and the predicted distribution of habitats most likely to support this biogenic habitat, derived from the interpretation of the acoustic data, lay on the eastern margin of the Lynn, Lincs and Inner Dowsing sites. This also coincided with high species diversity. The majority of the shallow gravel shoal which makes up the proposed wind farm sites support low to moderate diversity epifaunal biotopes typical of the southern North Sea and are of low conservation significance when taken in their wider geographic context. |
| Lineage | Lineage includes the background information, history of the sources of data, data quality statements and methods. | Two acoustic systems were used to survey the area: a RoxAnn™ AGDS system and a GeoSwath™ interferometric swath bathymetric system. This proved to be an efficient use of vessel time in that AGDS and GeoSwath data (side scan, swath bathymetry and backscatter) were collected simultaneously. The high resolution of the swath system gives information on bedform features as well as general bathymetry and major seabed sediment categories. The system has accurate motion-sensing so that all final outputs are corrected for motion and tide. Although AGDS gives poor resolution, it supplements swath data by giving greater discrimination between different sediment types. The two systems can be operated at a vessel speed of around 10-12km/hr, which enabled areas to be covered relatively rapidly. |
| Related keywords | ||
| Keyword | General subject area(s) associated with the resource, uses multiple controlled vocabularies | Marine Environmental Data and Information Network |
| Keyword title | MEDIN | |
| Keyword | General subject area(s) associated with the resource, uses multiple controlled vocabularies | Marine Environmental Data and Information Network |
| Keyword title | MEDIN | |
| Keyword | General subject area(s) associated with the resource, uses multiple controlled vocabularies | Offshore area of search |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Offshore Cable Corridor | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Zone search area | |
| 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 | Acoustic noise in the water column | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Sediment grain size parameters | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Horizontal velocity of the water column (currents) | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Habitat characterisation | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Habitat extent | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Seabed photography | |
| 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 | Side-scan sonar | |
| Geographical coverage | ||
| North | The northern-most limit of the data resource in decimal degrees | 53.271317239598 |
| East | The eastern-most limit of the data resource in decimal degrees | 0.52389494189844 |
| South | The southern-most limit of the data resource in decimal degrees | 53.164480450937 |
| West | The western-most limit of the data resource in decimal degrees | 0.44765720155553 |
| 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 | The Crown Estate | |
| mde@thecrownestate.co.uk | ||
| URL | marinedataexchange.co.uk | |
| 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 | Centrica Renewable Energy Ltd | |
| Position name | Offshore Wind Development Manager | |
| Delivery point | 1st Floor Millstream East | |
| City | Maidenhead Road, Windsor | |
| laura.jeffs.@centrica.com | ||
| URL | www.centricaenergy.com/renewables | |
| Role | The originator is the person or organisation who created, collected or produced the resource. | originator |
| Organisation name | Centrica Renewable Energy Ltd | |
| Position name | Offshore Wind Development Manager | |
| Phone | 01753 431289 | |
| Delivery point | 1st Floor Millstream East | |
| City | Maidenhead Road, Windsor | |
| laura.jeffs.@centrica.com | ||
| URL | www.centricaenergy.com/renewables | |
| Resource locators | ||
| Locator URL | Web address (URL) that links to the resource | https://www.marinedataexchange.co.uk/details/726/summary |
| Web address (URL) that links to the resource | https://www.marinedataexchange.co.uk | |
| Dataset constraints | ||
| 20 Limitations on Public Access - Access constraints | copyright | |
| 20 Limitations on Public Access - Other constraints | This states any limitations on access to the data and uses free text. | http://www.marinedataexchange.co.uk/pages/terms-of-use.aspx |
| 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. | http://www.marinedataexchange.co.uk/pages/terms-of-use.aspx |
| 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. | http://www.marinedataexchange.co.uk/pages/terms-of-use.aspx | |
| 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. | 2005-01-01 |
| 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. | 2014-08-19 |
| Metadata standard name | The name of the metadata standard used to create this metadata | MEDIN Discovery Profile |
| Metadata standard version | The version of the MEDIN Discovery Metadata Standard used to create the metadata record | 2.3.8 |