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Metadata: 2020, Seiche, Triton Knoll, Analysis of Underwater Noise and Source Level Estimation
Abstract:
An underwater acoustic survey was carried out during the installation of the first four foundations V11, V12, U10, and T09 between 17th January 2020 and 26th February 2020. This survey was performed to record the noise levels emitted during installation. The levels were measured at different distances from the piles and results were compared to the outputs of a prior modelling outcome. The report in this series presents the results and subsequent analysis of the underwater noise data recorded in this survey. The data was analysed using signal processing and acoustic propagation modelling for the survey region and Source Levels based on recorded data were reported. The underwater noise levels were recorded using two calibrated Acoustic Recording Units (ARUs) deployed at 500 m and 750 m from the foundations along pre-defined transects. In addition to ARUs, a Vertical Sound Profiling (VSP) system with a hydrophone was deployed from the starboard side of the noise monitoring vessel at distances between 4 km and 12 km. The recorded data was processed using peak detection algorithms to identify individual strike data and these are matched with relevant hammer strikes. The matched strikes were post-processed into different frequency bands and their Received noise Levels (RL) were calculated.
Data holder:
The Crown Estate
| Other details | ||
| Internal code | Internally assigned metadata identifier | 19260 |
| 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. | 2020, Seiche, Triton Knoll, Analysis of Underwater Noise and Source Level Estimation |
| Alternative title | The purpose of alternative title is to record any additional names by which the dataset may be known. | Analysis of Underwater Noise and Source Level Estimation |
| 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. | 86db5fea-371f-4ca4-9bc1-d13fbf05aff9 |
| Resource Identifier | This is the code assigned by the data owner. | TCE-2132 |
| 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 | 2020-01-17 |
| End date | This describes the date the resource ends. This may only be the year if month and day are not known | 2020-02-26 |
| 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. | An underwater acoustic survey was carried out during the installation of the first four foundations V11, V12, U10, and T09 between 17th January 2020 and 26th February 2020. This survey was performed to record the noise levels emitted during installation. The levels were measured at different distances from the piles and results were compared to the outputs of a prior modelling outcome. The report in this series presents the results and subsequent analysis of the underwater noise data recorded in this survey. The data was analysed using signal processing and acoustic propagation modelling for the survey region and Source Levels based on recorded data were reported. The underwater noise levels were recorded using two calibrated Acoustic Recording Units (ARUs) deployed at 500 m and 750 m from the foundations along pre-defined transects. In addition to ARUs, a Vertical Sound Profiling (VSP) system with a hydrophone was deployed from the starboard side of the noise monitoring vessel at distances between 4 km and 12 km. The recorded data was processed using peak detection algorithms to identify individual strike data and these are matched with relevant hammer strikes. The matched strikes were post-processed into different frequency bands and their Received noise Levels (RL) were calculated. |
| Lineage | Lineage includes the background information, history of the sources of data, data quality statements and methods. | In accordance with the site license, the monitoring and recording of underwater noise generated by the percussive piling events for installation 8.5 m diameter monopile foundations, was carried out by Seiche Ltd. during the installation of the first four foundations. The objective was to follow the methodology in accordance with the best practice underwater noise guidance and standards including those from CEFAS, MMO, and NPL [1]. The overall objective for the noise monitoring plan (document reference: 2505-TKN-CON-KRA- 3037145) is to validate the previous predictions and assess impacts on marine fauna using recorded audio data. The key objective is therefore to characterise the sound source as a function of the range and to compare this value with established recommendations. |
| Related keywords | ||
| Keyword | 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 | Bathymetry and Elevation | |
| 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 | Salinity of the water column | |
| 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 | Renewable Energy Lease area | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Species distribution | |
| Geographical coverage | ||
| North | The northern-most limit of the data resource in decimal degrees | 53.5359 |
| East | The eastern-most limit of the data resource in decimal degrees | 0.7128 |
| South | The southern-most limit of the data resource in decimal degrees | 53.4056 |
| West | The western-most limit of the data resource in decimal degrees | 0.9909 |
| 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 | |
| Phone | 02380 711840 | |
| enquiries@abpmer.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 | The Crown Estate | |
| Phone | +44 020 7851 5000 | |
| enquiries@thecrownestate.co.uk | ||
| Role | The originator is the person or organisation who created, collected or produced the resource. | originator |
| Organisation name | SHL Offshore Contractors BV | |
| Phone | unknown | |
| unknown | ||
| Role | The distributor is the person or organisation that distributes the resource. | distributor |
| Organisation name | The Crown Estate | |
| Phone | +44 020 7851 5000 | |
| enquiries@thecrownestate.co.uk | ||
| Role | The owner is the person or organisation that owns the resource. | owner |
| Organisation name | Triton Knoll Offshore Wind Farm Limited | |
| info@tritonknoll.co.uk | ||
| Resource locators | ||
| Locator URL | Web address (URL) that links to the resource | https://www.marinedataexchange.co.uk/details/TCE-2132/summary |
| Web address (URL) that links to the resource | https://www.marinedataexchange.co.uk | |
| Dataset constraints | ||
| 20.1 Limitations on Public Access - Access constraints | This states `otherRestrictions` from ISO vocabulary RestrictionCode and is an INSPIRE/GEMINI requirement. | otherRestrictions |
| 20.2 Limitations on Public Access - Other constraints | http://www.marinedataexchange.co.uk/pages/terms-of-use.aspx | |
| 21.1 Conditions for Access and Use - Use constraints | This states `otherRestrictions` from ISO vocabulary RestrictionCode and is an INSPIRE/GEMINI requirement. | otherRestrictions |
| 21.2 Conditions for Access and Use - Other constraints | 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. | 2025-08-13 |
| Harvest date | The date which this record has been (re)harvested from the provider. | 2026-04-12 |
| Metadata date | The date when the content of this metadata record was last updated. | 2026-02-10 |
| Metadata standard name | The name of the metadata standard used to create this metadata | MEDIN |
| Metadata standard version | The version of the MEDIN Discovery Metadata Standard used to create the metadata record | 3.1.2 |