Seabed Online

Maps and images of seabed habitat, geology and biological data in the seas around North-West Europe can now be viewed online. This resource has been created by the Joint Nature Conservation Committee, in a five nation project called, The Development of a Framework for Mapping European Seabed Habitats, or MESH.   Important to the project was discovering more about the processes that determine the existence of certain habitats in a particular location. These habitats are defined by a combination of unique conditions such as current, depth of water, temperature and the rock structure under the seafloor. Understanding and classifying this... (read more)
2008-01-10 09:02:14

Seabed in Motion

How ripples and waves determine sand-grain movement
Despite its great practical importance, we still have much to learn about the transport of sand grains in the coastal environment. This mainly due to the complexity of sand transportation processes influenced by both waves and net currents like the tide. Here an overview of recently completed PhD research that yielded new insights into, and predictive models for, wave-induced sand transport over rippled beds. Coastal regions and shallow shelf seas like the North Sea are increasingly subjected to human activity. Cities, harbours and industry are situated near the coastline, and farther offshore the seabed is used for the construction of... (read more)
2008-01-01 01:00:00 Jebbe J. van der Werf, University of Twente, The Netherlands.

Post-trawling Seabed Recovery

A voyage to find out what happens to seabed fauna in a deep-water trawling area if you leave it undisturbed several years got underway on 9th May 2011. The RRS James Cook set sail from Glasgow, Scotland (UK) in the direction of Rockall Trough, Rockall Bank and Hatton Basin, .     The deep-water banks and basins to the northwest of the UK are rich habitats for a variety of benthic species, including sponge reefs, cold-water coral mounds and sediment communities. At the same time, those areas form important fishing grounds for an international fishing fleet, including bottom fisheries such... (read more)
2011-05-12 09:13:49 ka

Seabed Surveys for EMEC

UK-based subsea services company Fathoms Ltd recently undertook two comprehensive surveys for the European Marine Renewable Energy Test Centre (EMEC) based in Orkney. The results of these surveys have enabled EMEC Ltd to extend its capabilities in the marine renewables sector, generating electricity from devices moored to the seabed.   Fathoms has recently expanded its operations to include work for clients such as Dounreay Site Restoration Ltd (to detect and recover radioactive particles from the seabed) and the Channel Coastal Observatory (National Oceanographic Centre, Southampton) collecting data to be used in a new coastal model being built to assist with... (read more)
2010-10-14 12:17:27

Seabed Sampling Investigation System

In 2008, GC Rieber Shipping took a 40% strategic stake on a geotechnical survey company - Bluestone Offshore. From start-up to operational, the team based in Singapore has come a long way in the past two years between purchasing their first vessel, initiating the retrofitting work with ST Marine early November and hiring key staff with extensive experience in Health & Safety, drilling, geotechnical and laboratory analysis.     The conversion work is upgrading the Bluestone Topaz into a dedicated DP geotechnical vessel and is focused on three main areas: shift the moon pool to the center of the vessel,... (read more)
2008-12-19 12:00:00

Autonomous Seabed Transponder Calibration

ASV’s C-Worker 6 successfully carried out a seabed transponder calibration in 1,300m-deep waters. The sea trials, which took place in the Gulf of Mexico, were conducted in rough conditions with 2.5m waves. ASV technical sales manager Brian Anderson said that this unmanned capability could save the oil and gas industry millions of dollars. The ability to conduct precise subsea positioning in challenging conditions broadens the possible applications for C-Worker. C-Worker is the world’s first unmanned oil and gas workboat. ASV designed and built the 6m vehicle at its waterside facility in Portchester, UK. ASV has completed the build of a... (read more)
2014-06-04 09:19:10

Airborne Seabed Mapping

Irish Project Features Hawk Eye II Bathymetric LiDAR
Seabed mapping in the near-shore marine environment is as vital as it is difficult. The Geological Survey of Ireland therefore turned to airborne remote sensing to perform bathymetric mapping of Ireland’s most critical shallow-water zones. As part of the Irish National Seabed Survey in 2008, Blom Aerofilms was contracted to deploy its Hawk Eye II bathymetric LiDAR system to create subsurface topographic maps. Data were acquired in three bays that presented significant challenges to traditional ship-borne seabed mapping and in a fraction of the time that surveying by ship would have required. View Larger Map   Subsurface topographic mapping has... (read more)
2009-02-12 04:36:33 David Critchley, Blom Aerofilms (UK)

Mapping Northwest UK Seabed

The Maritime and Coastguard Agency (MCA, UK) and six partner organisations launched the Ireland, Northern Ireland and Scotland Hydrographic Survey (INIS Hydro) project at the Belfast Harbour Commissioners Office on Monday 4th July 2011. INIS Hydro, which receives GBP3.2 million from the European Union's INTERREG IVA Programme, will produce a standardised hydrographic survey specification and accurate high-resolution bathymetric datasets for seven important seabed areas to the east of Ireland/Northern Ireland and off the west coast of Scotland. A total of 1400 km2 will be surveyed by the partner organisation's research vessels fitted with multibeam sonar technology.   High-quality bathymetric information... (read more)
2011-07-04 10:48:21 ka

Airborne Seabed Mapping

Seabed mapping in the near-shore marine environment is as vital as it is difficult. The Geological Survey of Ireland therefore turned to airborne remote sensing to perform bathymetric mapping of Ireland (read more)
2009-02-27 12:00:00 David Critchley

Klaipeda Harbour Seabed Mapped

The Lithuanian Coastal Research and Planning Institute (CORPI) has recently completed the first ever 100% coverage survey of Klaipeda Harbour, Lithuania, using the Kongsberg GeoAcoustics GeoSwath Plus COMPACT system. This EU-funded project was carried out during the implementation of the Sustainable Management of Contaminated Sediments (SMOCS) project, developed under the framework of the Baltic Sea Region Programme 2007-2013. The work focuses on the mapping of contaminated sediments in the modern port development area. Full-scale, shallow water multibeam, sidescan sea floor imagery and seismic mapping were carried out by CORPI's staff in order to gain a full understanding of the morphology... (read more)
2013-08-19 11:20:47
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