Martin Austin

Martin Austin is a Senior Lecturer in Coastal Sediment Dynamics in the School of Ocean Sciences at Bangor University, UK. His research focuses on the wave- and tidally-driven transport of sediments in shallow marine environments, particularly around the transition between the inter- and sub-tidal regions. Current projects focus on the patterns of sediment suspension that result from energetic storm forcing over shallow offshore sandbanks and the generation of turbulence and sediment suspension from seabed structures. He leads the Coastal Observatory work package of the SEACAMS2 project.  (read more)
2018-11-20 09:44:12

Netherlands and USA Cooperate in Environmental Security Certification Programme

Partrac GeoMarine, a Houston, USA, based Marine Survey and Consultancy company, has announced the award by the US Department of Defense (DoD) of a 3-year contract to demonstrate a new tool for mapping the in situ distribution of Contaminants of Concern (COCs) in aquatic sediments. The award is part of the Environmental Security Technology Certification Program (ESTCP), the DoD's environmental technology demonstration and validation programme. Partrac, together with its Netherlands based partner Medusa Explorations, will deploy the new instrument at up to three contaminated DoD Superfund sites to map the distribution of COCs such as Polycyclic Aromatic Hydrocarbons (PAHs), Polychlorinated Biphenyls... (read more)
2019-07-04 11:55:22

Non-linear Acoustics in Echosounding and Sediments

For attaining high-resolution echo-prints, echosounding equipment must fulfil certain requirements regarding directivity, pulse length and other properties possible to achieve using non-linear acoustics. One important problem in sediment acoustics is determination of the thickness of sediment layers. If the sound velocity is known, thickness can be calculated from travel times. Parametric acoustics, combined with principles of seismic refraction, allow estimation of the sound velocity of selected sediment layers. Non-linear acoustics demonstrates advantages when obtaining frequency-dependent sediment properties, such as the attenuation coefficient. Sediment echosounders transmit sound pulses directionally to the sea bottom and receive reflected signals both from the bottom... (read more)
2008-01-01 01:00:00

Multiple Corers

OSIL's range of Bowers and Connelly Multiple Corers are capable of collecting an undisturbed sediment sample from the seabed. Each of the four corers, Mega, Maxi, Midi and Mini use a hydrostatically damped coring mechanism to attain the undisturbed sample.   The Multiple Corers can sample from 4 up to 12 cores in a single deployment and are easy to deploy and operate. The corers collect the undisturbed sediment sample together with overlying supernatant water, which provides a unique insight into the sediment water interface. The rugged frame of the corers is made of 316 stainless steel and the core tubing itself... (read more)
2007-10-23 01:13:38

Arcelor Mittal’s Canal Dredging Work Starts

LUSCHI will mobilise its vessel Giovanella to Espírito Santo, Brazil, to assist in the dredging and final disposal of accumulated sediments in the seawater storage canal of Arcelor Mittal, one of the world's leading steel and mining companies. The canal is approximately 600 metres long and includes a sedimentation volume in the order of 46,000m³. The project aims to use a trailing suction hopper dredger, self-propelled, that sucks up the sediments into its own cisterns for disposal in offshore waters, provided by Companhia Docas do Espírito Santo - Codesa. This dredging equipment was chosen due to the material's characteristics and... (read more)
2014-07-30 10:34:24

Sedimentation Monitored in Yellow River Dam

The sediment levels in the Xiaolangdi dam (Yellow River, China) are being monitored using a GeoSwath wide swath bathymetry sonar.     The Yellow River (Huang He in Chinese) runs for over 5,400km. After leaving Inner Mongolia it passes through the extensive Loess Plateau, picking up an annual silt load of up to 3.91 billion tonnes. This makes it the most sediment-laden river in the world. The Xiaolangdi Dam is located 40km north of the ancient city of Luoyang (Henan Province) at the lower end of the middle reaches of the river. Xiaolangdi is a multi-purpose project for flood prevention,... (read more)
2008-01-08 12:00:00

Equipment Awards for Young Professionals

UK-based Aquatec is launching its second annual Equipment Awards on 1 March 2013. The awards are designed to give students and early career researchers the opportunity to use high-tech, commercially established instrumentation for their innovative and original research. Three awards are available, covering a range of instruments from a temperature and depth logger to an acoustic suspended sediment profiler. The awards give a loan of the instrument (varying from 6 weeks to 3 months), and a travel grant to allow the results of the research to be presented at a national or international conference. Graduate students and university researchers in... (read more)
2013-01-16 10:30:47

ASL Announces Next Generation in Acoustic Backscatter Measurements

A new tool to measure both sediment concentration and sediment size are being built by ASL Environmental Sciences (ASL). The Multi-frequency Ultrasonic Device (MUD) is based on ASL's successful Acoustic Zooplankton Fish Profiler (AZFP). The MUD and AZFP echosounders can be configured with up to four frequencies ranging from 38 kHz to 2 MHz. The MUD prototype is based on a set of higher frequencies (200 kHz, 769 kHz, 1.2 MHz and 2.0 MHz) that will allow for a broad range of particle size discrimination. While the AZFP is a high gain device for low scattering conditions and the greatest... (read more)
2019-01-08 08:16:34

Mariana Trench Teeming with Bacterial Community

An international research team has found a highly active community of bacteria in the bottom of the Mariana Trench located nearly 11 kilometres below sea level, which makes it the deepest site on Earth. The analysis documents that the trench sediments house almost 10 times more bacteria than in the sediments of the surrounding abyssal plain at much shallower water depth of 5-6km water – even though the environment at a depth of 11km is under extreme pressure: almost 1,100 times higher than at sea level. The participating deep-sea experts, among then scientist Frank Wenzhöfer from the Alfred-Wegener-Institut and the... (read more)
2013-03-20 10:10:03

OSIL Multi-corers in CSA Ocean Sciences' Gulf of Mexico Study

CSA Ocean Sciences has purchased two Mega Multiple Corers from UK-based Ocean Scientific International Ltd (OSIL) for use in a month-long deep-water sampling effort to assess sediment chemistry and infaunal communities in the Gulf of Mexico. The OSIL Multiple Corer enjoys a privileged position as the primary corer for environmental impact assessment worldwide, owing to its ability to collect up to 12 simultaneous high-quality undisturbed sediment samples including the sediment/water interface and overlying supernatant water. The 600mm long core tube collects approximately 450mm of sediment (0.35l) and 150mm of water (0.12l). The OSIL Multi Corer design has recently been updated... (read more)
2014-09-05 12:00:00
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