cb3fa3b9-b165-491d-aecc-1345d30c5e89 eng series The Crown Estate +44 020 7851 5000 1 St James's Market London SW1Y 4AH United Kingdom enquiries@thecrownestate.co.uk http://www.thecrownestate.co.uk pointOfContact 2015-10-28 MEDIN Discovery Profile 2.3.8 urn:ogc:def:crs:EPSG::4326 2011, Envision, Lewis Wave Farm, Benthic Drop-down Video Survey 2011-10 publication 00029 Lewis Wave Power Ltd. (LWP) (a wholly owned subsidiary of Aquamarine Power Ltd.) is seeking to develop a wave energy demonstration array off the west coast of the Isle of Lewis. As a first stage of the Environmental Impact Assessment (EIA) for the project, LWP commissioned Royal Haskoning Ltd. to produce an Environmental Scoping Report (Lewis Wave Power Ltd., 2011) to facilitate the identification and assessment of the potential environmental impacts associated with the project. The survey reported on here formed this field-based benthic component. Its purpose was to provide site-specific benthic data to inform an assessment of impact of the proposed development. The key objectives were to:  Determine the distribution and abundance of marine habitats and communities within the study areas;  Determine the substrate type at all locations sampled;  Identify habitats or species of conservation importance. Aquamarine Power Elder House 24 Elder Sreet Edinburgh EH1 3DX info@aquamarinepower.com www.aquamarinepower.com distributor Envision Mapping Ltd +44 (0)1661 854 250 +44 (0)1661 854 361 Stephenson House, Horsley Business Centre Newcastle-upon-Tyne Horsley NE15 0NY United Kingdom mail@envision.uk.com http://www.envision.uk.com/ originator Crown Estate Scotland 0131 260 6070 Quartermile Two, 2nd Floor, 2 Lister Square Edinburgh EH3 9GL enquiries@crownestatescotland.com custodian notPlanned Renewable Energy Lease area The Crown Estate Renewable Energy Development Areas 2012-05-15 revision 1 Pre-Construction monitoring The Crown Estate Renewable Energy Development Phases 2012-05-15 revision 1 Habitat extent Habitat characterisation SeaDataNet Parameter Discovery Vocabulary 2015-04-09 revision 88 Marine Environmental Data and Information Network Marine Environmental Data and Information Network http://marinedataexchange.co.uk/pages/terms-of-use.aspx copyright otherRestrictions copyright otherRestrictions http://marinedataexchange.co.uk/pages/terms-of-use.aspx http://marinedataexchange.co.uk/pages/terms-of-use.aspx eng environment -6.8290893 -6.3343413 58.3186404 58.5074111 2011-08-23 2011-08-30 GIS inapplicable https://www.marinedataexchange.co.uk/details/CES-207/summary A link to the web service or dataset. https://www.marinedataexchange.co.uk A link to the general host site. series The survey took place over the period 23rd - 30th August 2011. Sampling began on 24th August at the north end of the original Siadar study area, working southwards from one transect to the next. Video drops were carried out along the transects from east to west with the prevailing wind and current conditions. On Day 2 (25th August) the field work began at the southern boundary of the Labost site, moving north, again working with the wind (which had moved round to southerly - Force 2), and surface currents. After a change of survey plans in accordance with Aquamarine’s instructions, Envision concentrated on completing and extending the northern (Siadar) site. However, by the end of Saturday 27th August, the whole of both the Labost and Siadar survey areas and four additional transects, adjoining the northern boundary of the Siadar site, had been completed. Fortunately, the sea conditions had remained favourable during this time, although sea work ceased at around 3.15pm on Saturday 27th as the wind had moved round to the NW, Force 5, and was due to pick up to Force 7-8 later. Conditions were not suitable to go to sea on Sunday 28th (NW Force 7-8). Interestingly, the underwater visibility was relatively good on the first survey day (7m+), but it subsequently became poor (approximately only about 2m), due to a sharp rise in the presence of phytoplankton