4f4c4942-4343-5764-6473-313135313739 English NRW_DS121633 Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en 2026-03-03T16:20:37.893Z NRW 1.0 wel British National Grid (EPSG::27700) Swansea Bay Tidal Lagoon Geophysical Investigation (February 2012) (3rd Party Data) Swansea Bay Tidal Lagoon Geophysical Investigation (February 2012) (3rd Party Data) Ymchwiliad geoffisegol i lagwn y llanw ym Mae Abertawe, Chwefror 2012 2012-02-28 EXT_DS115179 A hydrographic and geophysical survey of the proposed Swansea tidal lagoon in Swansea Bay was carried out by Titan Environmental Surveys Ltd in the winter of 2011/12. This included singlebeam echosounder, sidescan sonar, surface tow boomer and magnetometer surveys. All data were referenced to OSGB36 datum using OSTN02 datum transformation, and seabed bathymetry was reduced to chart datum using the UKHO Vertical Offshore reference frame (VORF) model. The dataset shows a gently sloping seabed of thin sand and gravels overlying a sequence of fine sediments of up to 20m thickness on top of boulder clay. An outcrop of boulder clay divides the site into E and W zones with featureless smooth sands in the E, and predominantly gravel in the W. No bedforms large enough to produce bathymetric features were identified. The purpose of this data capture was to carry out a hydrographic and geophysical survey of the proposed Swansea Tidal Lagoon site in Swansea Bay. Data provided to Countryside Council for Wales (CCW) for internal business use only - for consultation on the Swansea Bay Tidal lagoon casework . Data is considered confidential and may not be disseminated. A hydrographic and geophysical survey of the proposed Swansea tidal lagoon in Swansea Bay was carried out by Titan Environmental Surveys Ltd in the winter of 2011/12. This included singlebeam echosounder, sidescan sonar, surface tow boomer and magnetometer surveys. All data were referenced to OSGB36 datum using OSTN02 datum transformation, and seabed bathymetry was reduced to chart datum using the UKHO Vertical Offshore reference frame (VORF) model. The dataset shows a gently sloping seabed of thin sand and gravels overlying a sequence of fine sediments of up to 20m thickness on top of boulder clay. An outcrop of boulder clay divides the site into E and W zones with featureless smooth sands in the E, and predominantly gravel in the W. No bedforms large enough to produce bathymetric features were identified. The purpose of this data capture was to carry out a hydrographic and geophysical survey of the proposed Swansea Tidal Lagoon site in Swansea Bay. Data provided to Countryside Council for Wales (CCW) for internal business use only - for consultation on the Swansea Bay Tidal lagoon casework . Data is considered confidential and may not be disseminated. Titan Environmental Survey Ltd Tital Environmental Surveys, Orion House, Waterton Industrial Estate, Bridgend, Mid Glamorgan, CF311 3XB, Wales n/a http://www.titansurveys.com/ INAZIN Power Ltd Inazin Power Ltd, Swan Yard, 9-13 West Marke Place, Cirencester, GL7 2NH, England info@inazin.com http://www.inazin.com/ Titan Environmental Survey Ltd Tital Environmental Surveys, Orion House, Waterton Industrial Estate, Bridgend, Mid Glamorgan, CF311 3XB, Wales n/a http://www.titansurveys.com/ INAZIN Power Ltd Inazin Power Ltd, Swan Yard, 9-13 West Marke Place, Cirencester, GL7 2NH, England info@inazin.com http://www.inazin.com/ Titan Environmental Survey Ltd Tital Environmental Surveys, Orion House, Waterton Industrial Estate, Bridgend, Mid Glamorgan, CF311 3XB, Wales http://www.titansurveys.com/ Titan Environmental Survey Ltd Tital Environmental Surveys, Orion House, Waterton Industrial Estate, Bridgend, Mid Glamorgan, CF311 3XB, Wales http://www.titansurveys.com/ Hydrography GEMET - INSPIRE themes, version 1.0 2008-06-01 geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme geophysical surveys single beam echosounder 3rd Party Data Third Party Data NRW Thesaurus 2023-12-31 geonetwork.thesaurus.local.theme.converted_nrw-keywords Side-scan sonar SeaDataNet Parameter Discovery Vocabulary 2021-01-06 geonetwork.thesaurus.external.theme.rdf+xml Integrated Public Sector Vocabulary 2013-04-03 geonetwork.thesaurus.external.theme.subjects NRW SMNR Vocabulary 2023-12-27 geonetwork.thesaurus.local.theme.converted_nrw-smnr-keywords This dataset is wholly owned by Titan Environmental Surveys Ltd. Data was provided to NRW for internal business use only and for consultation on the Swansea Bay Tidal lagoon casework. Data is considered confidential and may not be disseminated. no limitations © Titan Environmental Surveys Ltd, 2012. NRW cannot disseminate this data. Those seeking the data such permission should approach the originator directly. English oceans SeaVoX Vertical Co-ordinate Coverages 2021-01-06 benthic boundary layer Irish Sea Swansea Bay Carmarthen Bay -3.946 -3.859 51.576 51.617 2011-02-14 2012-02-16 -5.6 -9 Image Geotiff image Bathymetry .xyz file Sidescan sonar .xtf .jsf Report .pdf .dwg CAD files of interpreted features from SSS, also CAD bathymetry layer. Geophysical data (boomer, magnetometer) data not supplied. 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 2010-12-08 This dataset has not been assessed for conformance to the referenced INSPIRE regulation. false Survey carried out by Titan Environmental Surveys Ltd on commission from Inazin (formerly Low Carbon Tidal). Data and report provided to CCW by Titan, and marked as confidential. Odom Hydrotrac single beam echosounder at 200KHz and 16/sec sounding rate. Fully corrected using on board motion sensor and VORF models for tidal correction to chart datum. Sidescan sonar data captured using an Edgetech 4200-FS sidescan sonar, recording frequencies at 100 and 400 MHz simultaneously. See report for further information. Survey carried out by professional hydrographers. All data corrected and referenced to OSGB36 datum and chart datum for bathymetry using the UKHO Vertical Offshore Reference Frasme (VORF) model. Survey carried out by Titan Environmental Surveys Ltd on commission from Inazin (formerly Low Carbon Tidal). Data and report provided to CCW by Titan, and marked as confidential. Odom Hydrotrac single beam echosounder at 200KHz and 16/sec sounding rate. Fully corrected using on board motion sensor and VORF models for tidal correction to chart datum. Sidescan sonar data captured using an Edgetech 4200-FS sidescan sonar, recording frequencies at 100 and 400 MHz simultaneously. See report for further information. Survey carried out by professional hydrographers. All data corrected and referenced to OSGB36 datum and chart datum for bathymetry using the UKHO Vertical Offshore Reference Frasme (VORF) model.