OSIL Launches ROV/AUV-mounted Sediment Corer

UK-based Ocean Scientific International (OSIL) has announced the release of an innovative new sediment corer designed to be mounted to the skids of ROVs or AUVs. The self-contained system will allow sediment samples to be collected during routine ROV operations and can be daisy chained together to allow multiple core assemblies to be installed as one system. The assemblies are powered and controlled by the customers own skid control unit and have been pressure tested for use in depths of up to 1200m, with deeper units currently in development. The design is based around the industry standard multiple (multi) corer,... (read more)
2018-01-19 12:58:15

Fraction of Buried Fukushima Sediment Uncovered

An international research team reports results of a three-year study of sediment samples collected offshore from the Fukushima Daiichi Nuclear Power Plant in a new paper published on 18 August 2015 in the American Chemical Society's journal, Environmental Science and Technology. The research aids in understanding what happens to Fukushima contaminants after they are buried on the seafloor off coastal Japan. Led by Ken Buesseler, a senior scientist and marine chemist at the Woods Hole Oceanographic Institution (WHOI), the team found that a small fraction of contaminated seafloor sediments off Fukushima are moved offshore by typhoons that resuspend radioactive particles... (read more)
2015-08-19 09:31:32

Measuring Sediment Fluxes with H-ADCP

During floods that occurred in September 2013 in Germany, Dutch company Aqua Vision carried out stream flow and sediment flux measurements on the River Elbe. The campaign was carried out in close cooperation with the Hamburg Port Authority (HPA) and represents one part of a larger research project. The primary goal was to develop a permanent sediment flux monitoring station using horizontal ADCPs (H-ADCP). Several further campaigns are planned in the coming months to monitor different flow conditions. Sediment fluxes have already been measured in close proximity to the H-ADCP currently in operation in The Port of Hamburg. This was... (read more)
2013-10-30 12:24:39

Acoustic Profiler Simplifies Suspended Sediment Measurements

The AQUAscat 1000LT acoustic profiler by Aquatec (UK) has been developed to make measurement of suspended sediment easier. The AQUAscat 1000LT observes profiles of suspended sediment concentration of up to 2.5m using multi-frequency acoustics. Profiling allows sediment dynamics such as re-suspension and entrainment to be explored, which is not possible with single point measurements. The instrument is supplied with user-friendly post-processing software that allows the mean particle size and concentration to be calculated from the acoustic backscatter output. The self-contained design and rechargeable battery make it easy to deploy and maintain. Suitable for use to 200m, the new AQUAscat can... (read more)
2016-02-16 08:35:59

OSIL Designs Innovative Sediment Transport Solution

BMM Meetdienst in Belgium has chosen OSIL to provide a high-tech sediment transport measurement solution. The system will be used to measure sediment direction and currents off the coast of Belgium in the North Sea. OSIL designed an integrated system that includes a SonTek ADCP for current measurement, a SonTek ADV for water velocity, a Seabird MicroCat for conductivity and temperature, and an optical backscatter device from D&A Instruments to measure sediment concentration. OSIL has harnessed these instruments to provide a synchronised system which interprets the data to provide highly accurate information on sediment movement and also currents. (read more)
2004-12-16 12:00:00

Underwater Laser Scanners for Sediment Transport and Scour Analysis

Genex Systems, USA, has trialled and the purchased a 2G Robotics' ULS-100 underwater laser scanner. The objective of the trials was to test the capabilities of the ULS-100 for bridge scour experiments and sediment transport analysis. The trials were conducted at the TFHRC J. Sterling Jones Hydraulics Research Laboratory. 2G Robotics’ ULS line of underwater laser systems produce true-scale high-resolution 3D models of underwater structures and environments in real time. These 3D models function as dimensional records and serve as reliable references from which to obtain accurate measurements and information. Both stationary and dynamic scans were performed with the ULS-100.... (read more)
2016-04-20 09:56:38

Sediment and Soil Characterisation Systems for North America

MacArtney entered into a partnership with dotOcean for North American markets. The agreement provides MacArtney’s customers via its subsidiary MacArtney Inc. access to the range of dotOcean sediment and soil measurement products. The products included in this partnership include the GraviProbe, a, free-fall impact instrument analysing soil layers during intrusion; the deep sea GraviProbe, which captures high quality geotechnical profiles of mud and soil layers up to 5,500m water depths; the DensX, an in-situ, direct measurement mud density method using safe X-ray technology and an automated winch; and the iCone, a manual profiler that analyses underwater soil layers in small... (read more)
2016-02-18 03:19:53

Sediment Analysis Unveils Historic Life in Black Sea

Marine paleoecologist Marco Coolen from Woods Hole Oceanographic Institution (WHOI, USA) was amazed about the variety of past plankton species that have left behind their genetic make-up (i.e. the plankton paleome), as data mining showed. The semi-isolated Black Sea is highly sensitive to climate-driven environmental changes, and the underlying sediments represent high-resolution archives of past continental climate and concurrent hydrologic changes in the basin. The brackish Black Sea is currently receiving salty Mediterranean waters via the narrow Strait of Bosphorus as well as freshwater from rivers and via precipitation. During glacial sea level lowstands, the marine connection was hindered, and... (read more)
2013-05-07 04:57:09

USV to Map Lakes and River Sediment Movement in Norway

Swathe Services has announced that an Unmanned Surface Vessel (USV), designed and built by Unmanned Survey Solutions in Hayle, Cornwall, has been purchased by Trondheim University for research studies in Norway. The Inception Class Mark 2 USV is built by surveyors for surveyors. It’s designed for hydrographic surveys and data acquisition in ports and harbours, lakes and rivers, shallow coastal or enclosed inland areas. James Williams, managing director of Swathe Services said: “We are proud to have been selected to provide the Department of Civil Engineering with a complete Multi-Beam Echo-Sounder (MBES) system along with the USS Inception Mark II... (read more)
2018-07-10 01:25:49

Liverpool Bay Sediment Dynamics Discovery Could Save Millions

New research tracking the movement of dredged sediment around Liverpool Bay could save millions of pounds, according to scientists at the National Oceanography Centre in Liverpool, UK. Each year, sediment has to be dredged from the port and deposited elsewhere to maintain access for commercial vessels. But according to the new study, the dredged material reappears in the port within just a few weeks of its removal, carried by sea currents. According to Dr Alex Souza of the Natural Environment Research Council’s (NERC) National Oceanography Centre, there are two competing sediments coming in; from the sea and from the river.... (read more)
2013-04-18 09:44:14
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