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This project addresses an issue in the present FEPA license pertaining to cable installation methods between the turbines for the Gunfleet Sands Offshore Wind Farm. A review of potential inter-turbine cable installation methods for Gunfleet Sands Offshore Wind Farm has been undertaken. The review identifies the two primary installation options as jetting or ploughing and provides consideration of the potential environmental issues arising from each option. Practical engineering solutions favour the jetting option above ploughing, and considerations provided in this note suggest that the majority of material being fluidised will settle out over a period of less that 10 minutes. A set of conservative calculations have been provided to indicate primary features of the fate of fluidised sediment arising from jetting methods. From these calculations it is determined that the small fraction of silts have the potential to remain in suspension for longer periods and become advected away from the trench in the form of a sediment plume. The relative impact of this plume needs to reflect that , in the main, the mud fraction is nominal (<5% content) and hence the actual volume of material released at any time is low. Furthermore, the rapid dispersion of any plume is unlikely to create concentrations that are measurable above ambient conditions and detectable beyond distances of a few hundred metres as the plume is entrained into ambient sediment loads. All plume effects are expected to be short-lived and not act cumulatively with subsequent cable laying operations.
DONG Energy
| Other details | ||
| Internal code | Internally assigned metadata identifier | 15422 |
| 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. | 2005, ABP Mer, Gunfleet Sands Offshore Wind Farm, Inter-turbine Cable Installation Options |
| 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. | c84ff5e57ee45cceb2e2b9205a3803dc |
| Resource Identifier | This is the code assigned by the data owner. | 1460 |
| 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 |
| End date | This describes the date the resource ends. This may only be the year if month and day are not known | 2012-10-29 |
| 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'. | notPlanned |
| Abstract | The abstract provides a clear and brief statement of the content of the resource. | This project addresses an issue in the present FEPA license pertaining to cable installation methods between the turbines for the Gunfleet Sands Offshore Wind Farm. A review of potential inter-turbine cable installation methods for Gunfleet Sands Offshore Wind Farm has been undertaken. The review identifies the two primary installation options as jetting or ploughing and provides consideration of the potential environmental issues arising from each option. Practical engineering solutions favour the jetting option above ploughing, and considerations provided in this note suggest that the majority of material being fluidised will settle out over a period of less that 10 minutes. A set of conservative calculations have been provided to indicate primary features of the fate of fluidised sediment arising from jetting methods. From these calculations it is determined that the small fraction of silts have the potential to remain in suspension for longer periods and become advected away from the trench in the form of a sediment plume. The relative impact of this plume needs to reflect that , in the main, the mud fraction is nominal (<5% content) and hence the actual volume of material released at any time is low. Furthermore, the rapid dispersion of any plume is unlikely to create concentrations that are measurable above ambient conditions and detectable beyond distances of a few hundred metres as the plume is entrained into ambient sediment loads. All plume effects are expected to be short-lived and not act cumulatively with subsequent cable laying operations. |
| Lineage | Lineage includes the background information, history of the sources of data, data quality statements and methods. | conducted by ABP marine environmental research for RPS Hydrosearch |
| Additional information | This describes relevant references to the data e.g. reports, articles, websites plus other useful information not captured elsewhere. | Presentation type: digital representation of a primarily textual item (can contain illustrations also) Supply media: 002 Origin: ABPmer |
| 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 | FEPA | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Socio-economic and Infrastructure | |
| Geographical coverage | ||
| North | The northern-most limit of the data resource in decimal degrees | 51.752910014735 |
| East | The eastern-most limit of the data resource in decimal degrees | 1.2609909324585 |
| South | The southern-most limit of the data resource in decimal degrees | 51.710526813632 |
| West | The western-most limit of the data resource in decimal degrees | 1.1822141549296 |
| 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 | DONG Energy | |
| Position name | Project Manager | |
| Phone | +45 99 55 11 11 | |
| Delivery point | Kraftværksvej 53, Skærbæk, 7000 Fredericia | |
| URL | www.dongenergy.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 | DONG Energy | |
| Position name | Project Manager | |
| Phone | +45 99 55 11 11 | |
| Delivery point | Kraftværksvej 53, Skærbæk, 7000 Fredericia | |
| URL | www.dongenergy.com | |
| Role | The originator is the person or organisation who created, collected or produced the resource. | originator |
| Organisation name | DONG Energy | |
| Position name | Project Manager | |
| Phone | +45 99 55 11 11 | |
| Delivery point | Kraftværksvej 53, Skærbæk, 7000 Fredericia | |
| URL | www.dongenergy.com | |
| Resource locators | ||
| Legal limitations | Any restrictions imposed on accessing the resource. | no conditions apply |
| Available data formats | ||
| Data format name | Format in which digital data can be provided for transfer | doc |
| 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. | 2004-10-22 |
| Date of creation | The date that the resource was created. | 2004 |
| Metadata date | The date when the content of this metadata record was last updated. | 2008-04-09 |
| 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 | Version 2.3.5 |
© OpenStreetMap contributors