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

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

Global Sediment Observations for the Dredging Industry

Coastal engineering and dredging companies often require an assessment of the suspended sediment concentrations. At the project proposal stage, this information is needed to assess the amount of work to be done and the costs involved and once dredging or construction is underway, information on suspended matter concentrations may be required for monitoring the environmental impact of the dredging or construction work. ARGOSS has developed a new service to produce maps of suspended sediment concentrations, based on satellite remote sensing data. The service has been demonstrated successfully in the Berbice estuary, an area of slowly migrating mudbanks in Guyana, and... (read more)
2008-01-01 01:00:00

Horizontal ADCP Real-time Suspended Sediment Monitoring

PDT-H is Aqua Vision’s toolbox for the existing horizontal ADCP software suite, ViSea-H DAS. This toolbox lets the user quantify sediment concentrations and fluxes from horizontal ADCP data. PDT-H calculates suspended sediment fluxes by extrapolating the vertical concentration profile. The toolbox also lets the user post-process and optimise self-contained horizontal ADCP data with e.g. grain size distribution, calibration coefficients, etc. The development and testing of PDT-H has been carried out in close cooperation with the Port of Hamburg. CEO, Peter Meijer, said that developing PDT-H was the logical next step for the ViSea-H DAS software suite. He added that Aqua... (read more)
2014-05-01 09:09:14

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

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

Sediment Transport Software For Streams And Water Channels

Aqua Vision, The Netherlands, has released the ViSea STAR (Sediment Transport Analysis Routine) software package.This solution has been developed to provide quick and easy sediment concentration, flux data and figures for water resource professionals. The software calculates this data using acoustic doppler current profiler (ADCP) output files and sediment concentrations from water samples. ViSea STAR allows users to easily load and validate multiple transects, enter and edit water samples, select parameters of interest and generate an array of output, with just a few clicks of the mouse. The user can choose between multiple output formats, including ASCII files, table summaries... (read more)
2014-11-05 11:21:25

Suspended Sediment Concentration Converter for AQUAlogger 210TY

Aquatec Group has introduced an SSC converter for their popular AQUAlogger 210TY turbidity logger. Now included as standard in the AQUAtalk software package, users will be able to convert their turbidity readings to suspended sediment concentration (SSC) with ease. The conversion can be applied pre or post deployment via one of three methods. By using collected in-situ samples or carrying out laboratory analysis, users can select the most appropriate conversion and let the software do the work. Alternatively, previous conversion factors can be easily applied. The transparent process allows users to keep accurate records of conversions and continually add samples... (read more)
2016-03-04 11:53:20
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