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2012-2013, Fugro EMU, Westermost Rough, Annex 1 Geogenic Reef Assessments

A geotechnical survey campaign was undertaken within the vicinity of the Westermost Rough Offshore Wind

Farm. This was supported by a preliminary review of acoustic data and assessment for the presence of Annex I

reefs to minimise the risk of potential damage to protected features.

Following the review of existing data, a drop down video survey protocol was

developed (EMU, 2011) and approved by the Marine Management Organisation (MMO). Part of this protocol

identified that a number of proposed geotechnical sampling sites were likely to be in the vicinity of potential

Annex I reefs and therefore warranted field ground-truthing by means of drop down video to verify the

presence and status of these features. The video ground-truthing survey has now been completed. Drawing upon the findings of this survey, the 2012 EMU report present within this series provides an update of the assessment of the potential Annex I reefs present at the proposed

geotechnical sample locations and fulfils condition 3.1.1 of the Marine Licence (Licence L/2011/001075). The aim of the 2013 Fugro EMU document also present within this series was to satisfy Marine Licence condition 31.22 and to address the responses from

the MMO regarding the Annex I reef features (letter ref: REN024, dated 12th April 2013, and 21st June

2013). The objectives were to assess the impacts (direct and indirect) of the construction activities on

the potential Annex I features.

The objectives of this report were to:

1. Assess the direct impact (loss of habitat) of each of the construction activities;

2. Assess the associated indirect impacts (increase in sediment smothering, and suspended

sediment concentrations.

3. Assess the cumulative impacts of all construction activities.

Simple

Date (Creation)
2012-05-07
Date (Revision)
Date (Publication)
2021-10-12
Date (Publication)
2024-11-15
Citation identifier
7f9e988f-7851-49d9-b626-1561e5f5673f
Point of contact
Organisation name Individual name Electronic mail address Role
Fugro EMU Limited Originator of Dataset
Joint Nature Conservation Committee, Peterborough Office Author
GEMET - INSPIRE themes, version 1.0
  • Oceanographic geographical features
SeaVoX salt and fresh water body gazetteer
  • North Sea
SeaDataNet Agreed Parameter Groups
  • Biota composition
  • Habitat
  • Acoustics
  • Field geophysics
  • Area Management/Designation
  • Energy
  • Underwater photography
SeaDataNet device categories
  • underwater cameras
SeaDataNet Parameter Discovery Vocabulary
  • Habitat characterisation
  • Habitat extent
  • Seabed photography
SeaVoX Platform Categories
  • self-propelled boat
MEDIN data format categories
  • Geographic Information System
SeaDataNet Measurement Periodicity Categories
  • day to sub-week
Keywords
    Access constraints
    Other restrictions
    Other constraints
    no limitations to public access
    Use limitation

    Conditions for access and use apply

    Use constraints
    Other restrictions
    Other constraints

    ODC-ODbL

    Language
    English
    Character set
    UTF8
    Topic category
    • Oceans
    Begin date
    2011-11-12
    End date
    2011-11-21
    N
    S
    E
    W
    thumbnail




    Unique resource identifier
    WGS 1984

    Spatial representation info

    No information provided.
    Distribution format
    Name Version
    Geographic Information System

    1

    OnLine resource
    Protocol Linkage Name

    WWW:DOWNLOAD-1.0-http--download

    https://cloud.emodnet-ingestion.eu/index.php/s/0kVJT5DspSh4itO

    WWW:LINK-1.0-http--link

    https://emodnet.ec.europa.eu/geonetwork/srv/eng/catalog.search#/metadata/e6ae04e7-b725-4cbd-b946-fc664ef40818
    Hierarchy level
    Dataset

    Conformance result

    Title

    COMMISSION REGULATION (EC) No 1205/2008 of 3 December 2008 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards metadata

    Date (Publication)
    2010-12-08
    Explanation

    See the referenced specification

    Pass
    No

    Conformance result

    Title

    Corrigendum to INSPIRE Metadata Regulation published in the Official Journal of the European Union, L 328, page 83

    Date (Publication)
    2010-12-08
    Explanation

    See the referenced specification

    Pass
    No

    Conformance result

    Title

    Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services

    Date (Publication)
    2010-12-08
    Explanation

    See the referenced specification

    Pass
    No
    Statement

    Two marine vessels were used during the geophysical campaign. At each geophysical site a circle of 50m radius was examined to assess for presence of features. At geophysical survey sites with potential Annex 1 features ground truthing took place using drop down video to assess seabed biological communities, and substrate type.



    A total of 31 sites were investigated by Fugro Survey Limited between 12th November and 21st November 2011 inclusive on board the survey vessel MV Flatholm. Photo stills were taken with their accompanied positional fixes for geo-referencing. Full video coverage and at least 5 stills images collected along a 100m transect in the direction of the feature, to confirm extent or proximity of the habitat If no features of interest were found then an additional transect was surveyed perpendicular to the original transect to confirm habitat extent. This maximised the potential to use the information derived from the geophysical data, rather than employing a simple four point (cardinal) survey. A modified approach was employed for the 325m radius circles, as cross transects across the entire sites would not have been practicable, due in part to the anticipated high density of static fishing gear within the area, and tidal constraints. Instead, where features were identified, a single transect crossing either side of the feature was undertaken. The purpose of conducting the drop down video in this way was to confirm the presence of the feature, and also to confirm the absence of Annex I habitat either side of the anticipated feature.



    Each stills image collected as part of the seabed video survey was analysed and categorised (no reef, low, medium and high) using the established geogenic reef scoring protocols as described by the EU revised interpretation manual (CEC, 2007) in the EU habitats directive. These categories were then overlain on the existing acoustic data. The video footage was also reviewed to confirm the observations made from the static images and to provide further detail on the qualifying features. The video footage also enabled the extent of the features to be confirmed against the acoustic data and stills image analysis results. Drawing upon the acoustic, benthic and seabed video data, additional potential Annex I features were also interpolated and delineated within the Offshore Wind Farm Area and Cable Route.

    Metadata

    File identifier
    7f9e988f-7851-49d9-b626-1561e5f5673f XML
    Metadata language
    English
    Character set
    UTF8
    Hierarchy level
    Dataset
    Date stamp
    2025-05-09T00:00:00
    Metadata standard name

    ISO 19115:2003/19139

    Metadata standard version

    1.0

    Metadata author
    Organisation name Individual name Electronic mail address Role
    Joint Nature Conservation Committee, Peterborough Office Point of contact
     
     

    Overviews

    Spatial extent

    thumbnail

    Keywords

    GEMET - INSPIRE themes, version 1.0

    Oceanographic geographical features
    MEDIN data format categories

    Geographic Information System
    SeaDataNet Agreed Parameter Groups

    Acoustics Area Management/Designation Biota composition Energy Field geophysics Habitat Underwater photography
    SeaDataNet Measurement Periodicity Categories

    day to sub-week
    SeaDataNet Parameter Discovery Vocabulary

    Habitat characterisation Habitat extent Seabed photography
    SeaDataNet device categories

    underwater cameras
    SeaVoX Platform Categories

    self-propelled boat


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