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This data series details the results of the metocean survey undertaken by EMU Limited in the Rampion Offshore Wind Farm Zone in the English Channel. The survey data were collected between November 2010 and May 2011 and comprise measurements of Directional wave parameters, Current profiles, Water levels, Suspended sediment concentrations , Water temperature , Wind speed, gust and direction, Air temperature and pressure. The aim of the measurement campaign was to capture low frequency, high energy events and high frequency, low energy events in order to establish a description of the site conditions. The three seabed measurement stations were deployed on the 1st November 2010. The equipment at Locations 1 and 2 was recovered in February 2011, whereas the deployment at Location 3 was extended to allow collection of oceanographic data concurrent with the meteorological buoy. The resultant dataset from Location 3 is approximately 6 months of oceanographic data and in excess of 3 months of meteorological data. The deliverables of this contract are intended to inform the Environmental Impact Assessment (to be undertaken by ABPmer) and the engineering design of wind farm structures. The deliverables provided in this dataseries consist of: 1. The Metocean Survey Report (this document) 2. The Operational Reference Document 3. The data files in both processed and RAW format. (all RAW data is zipped as 'Deployment 1', 'Deployment 2' and 'Deployment 3')
The Crown Estate
Restricted public access
| Other details | ||
| Internal code | Internally assigned metadata identifier | 7695 |
| 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. | 2010-2011, Fugro EMU, Zone 6 - Rampion, Metocean Survey and Assessment |
| 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. | d1ee34f077861b18b148eacff208e221 |
| Resource Identifier | This is the code assigned by the data owner. | RAMFugroEMUMetocean200620141 |
| 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 | 2010-11-01 |
| End date | This describes the date the resource ends. This may only be the year if month and day are not known | 2011-05-10 |
| Spatial resolution | This describes the spatial resolution of the dataset or the spatial limitations of the service. | inapplicable |
| 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'. | continual |
| Abstract | The abstract provides a clear and brief statement of the content of the resource. | This data series details the results of the metocean survey undertaken by EMU Limited in the Rampion Offshore Wind Farm Zone in the English Channel. The survey data were collected between November 2010 and May 2011 and comprise measurements of Directional wave parameters, Current profiles, Water levels, Suspended sediment concentrations , Water temperature , Wind speed, gust and direction, Air temperature and pressure. The aim of the measurement campaign was to capture low frequency, high energy events and high frequency, low energy events in order to establish a description of the site conditions. The three seabed measurement stations were deployed on the 1st November 2010. The equipment at Locations 1 and 2 was recovered in February 2011, whereas the deployment at Location 3 was extended to allow collection of oceanographic data concurrent with the meteorological buoy. The resultant dataset from Location 3 is approximately 6 months of oceanographic data and in excess of 3 months of meteorological data. The deliverables of this contract are intended to inform the Environmental Impact Assessment (to be undertaken by ABPmer) and the engineering design of wind farm structures. The deliverables provided in this dataseries consist of: 1. The Metocean Survey Report (this document) 2. The Operational Reference Document 3. The data files in both processed and RAW format. (all RAW data is zipped as 'Deployment 1', 'Deployment 2' and 'Deployment 3') |
| Lineage | Lineage includes the background information, history of the sources of data, data quality statements and methods. | Oceanographic parameters were measured at three locations within the Rampion site. The locations were chosen in agreement between E.ON, EMU, ABPmer and the fisheries liaison representatives appointed by E.ON. Nortek AWAC: In order to establish any spatial differences in wave climate across the wind farm site, the approach taken was to use the same wave measurement device at each of the three chosen locations. The selected instrument was the Nortek AWAC which, in addition to the wave parameters, provides current profiles and water level readings. A 1MHz AWAC was the appropriate frequency to operate at Locations 1 and 2 (25m and 26m depth to LAT respectively). At location 3 (49m depth to LAT), a 600 KHz AWAC was deployed. In each case, the acoustic heads of the AWAC instruments were mounted 0.6m above the seabed. A current profile was recorded every ten minutes over a 60 second averaging period, and a wave measurement burst was conducted every hour, which consisted of 1024 records at 1Hz. This equates to 2048 records created during the Acoustic Surface Tracking burst. A requirement of the contract stipulates that AWACs less than two years old must be used for this project. Alternatively, instruments greater than two years old must be returned to the manufacturer for acceptance testing. Two instruments (those used at Locations 1 and 2) were required to be returned to the manufacturer. They also underwent thorough testing by EMU prior to deployment to ensure acceptable performance. Aqualogger 210TYT: Aqualogger 210 TYT instruments with Seapoint Optical Backscatter Sensors (OBS) were used to provide backscatter measurements. This was to complement the acoustic backscatter data collected by the AWACs. The backscatter readings were converted to suspended sediment concentration using a regression equation established by taking water samples during field operations. Further details of the methods used in establishing the conversion can be found in section 9.5. The Aqualoggers were mounted on the seabed frame 0.5m above the seabed and also provided sea temperature measurements. The Aqualoggers were configured to take a burst of readings â?? at 1 Hz for 60 seconds, once every ten minutes. The burst was averaged during post-processing to produce one reading per ten minutes. The Aqualogger instruments deployed for this project were purchased by EMU in October 2010. The on board sensors were calibrated by the manufacturer prior to dispatch. Seabed Franme Mooring: Each AWAC and Aqualogger was mounted in a seabed frame, deployed as part of an L shaped mooring as shown in Figure 2.2.1 below. The L shaped mooring allowed the equipment to be marked by a navigational mark at the surface and to be safely recovered. Suspended Sediment Measurements: The suspended sediment measurements were gathered using both the acoustic return of the AWACs and the Optical Backscatter readings. These values were converted to a suspended sediment concentration in mg/l using a regression equation. The equations were established by analysing water samples collected alongside the instruments and from previous studies. The analysis of water samples was undertaken at EMU?s sediment laboratory according to the procedure set out in â??EMU in-house Methods for the Determination of Suspended Sediment (Emu MET/17): 1.2µm Glass Fibre Paper Filtration Method (105ºC)â? based on â??Methods for the Examination of Water and Associated Materialsâ? (HMSO, 1980). Meteorological Buoy: The meteorological buoy deployed at Location 3 was developed for the project to accommodate two different wind sensors. The primary sensor was a Vaisala WXT 520 measuring wind speed and direction, gust speed, air temperature and pressure. A secondary sensor; a Gill Windsonic was mounted on the buoy for redundancy. The Planet Ocean DB-175 buoy provided the measurement platform. Both sensors logged data to an on board logger unit every ten minutes and one record per hour was transmitted ashore via iridium satellite telemetry. At the time of report writing, the Vaisala sensor is undergoing a calibration procedure at a recognised MEASNET facility; Svend Ole Hansen ApS Wind Engineering. The calibration is being performed post-deployment due to initial technical problems with the calibrated sensor. |
| Related keywords | ||
| Keyword | 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 | Consenting | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Pre-Construction engineering | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Air temperature | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Air pressure | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Sea level | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Wave direction | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Spectral wave data parameters | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Other wave statistics | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Wave height and period statistics | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Temperature of the water column | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Temperature variation in the water column | |
| 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 | Suspended particulate material aggregates | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Wind strength and direction | |
| 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 | |
| Geographical coverage | ||
| North | The northern-most limit of the data resource in decimal degrees | 50.8165 |
| East | The eastern-most limit of the data resource in decimal degrees | -0.0497 |
| South | The southern-most limit of the data resource in decimal degrees | 50.6121 |
| West | The western-most limit of the data resource in decimal degrees | -0.3725 |
| Regional sea | soil and sediment | |
| Eastern Channel | ||
| VIId | ||
| 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 | EMU Limited - Head Office | |
| Individual name | Marine Data Officer Emu Ltd. | |
| Role | The originator is the person or organisation who created, collected or produced the resource. | originator |
| Organisation name | EMU Limited - Head Office | |
| Individual name | Marine Data Officer Emu Ltd. | |
| 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 | |
| URL | https://www.thecrownestate.co.uk/ | |
| Resource locators | ||
| Locator URL | Web address (URL) that links to the resource | https://www.marinedataexchange.co.uk/details/2586/summary |
| Web address (URL) that links to the resource | https://www.marinedataexchange.co.uk | |
| Dataset constraints | ||
| 20 Limitations on Public Access - Access constraints | ISO restriction code chosen from ISO 19115-1 Codelist | otherRestrictions |
| 20 Limitations on Public Access – Other constraints | Any restriction on the use of the resource such as the need to agree to certain licence conditions. | Restricted public access |
| 21 Conditions for Access and Use - Use limitation | Any restrictions imposed on accessing the resource such as the need to agree to certain licence conditions. | Restricted public access |
| Available data formats | ||
| Data format | Format in which digital data can be provided for transfer | Database |
| 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. | 2011-09-09 |
| Date of last revision | The most recent date that the resource was revised. | 2011-09-09 |
| Metadata date | The date when the content of this metadata record was last updated. | 2014-06-20 |
| 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 | 2.3.7 |
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