Improving the Accuracy of ADCP Discharge ­Measurements

Automating Edge Discharge Calculation in ADCP Software
There is a key new feature in the discharge measurement software ViSea DAS that allows the user to add a bottom profile. By doing so, side extrapolation from the start and end points of the survey track to the shore is calculated automatically using dGPS positioning. This removes the error inherent in estimating the track to shore distance for each individual track, which is the current method used in comparable software packages. This paper describes research that validates this new approach. Discharge measurements are important for the characterisation of rivers and are the basis of many models. There are many... (read more)
2014-05-19 02:19:44

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

Express ADCP Configuration For Basic Current Profiling Needs

Teledyne RD Instruments' Marine Measurements has developed an Express Acoustic Doppler Current Profiler (ADCP) Configuration, designed to offer the performance benefits of Broadband processing, in a basic package priced nearly 30% below Teledyne RDI’s Workhorse ADCPs. The Express ADCP configuration answers to the needs of customers whose applications involve the collection of only basic current profile measurements at fixed locations. This configuration offers an entry-level option for those with limited needs and/or budgets, with applications that demand Teledyne RDI's Broadband performance and data reliability. The Express can also be upgraded to the full spectrum of Workhorse capabilities without the need... (read more)
2006-10-04 12:00:00

TRIAXYS Currents Buoy Available with Teledyne RDI ADCP

The TRIAXYS Directional Wave Buoy can be ordered with a Monitor 600 KHz Teledyne RD Instruments Acoustic Doppler Current Profiler (ADCP). The combination can provide accurate, real-time waves and currents data in virtually any water depth, without the need for divers or cables. It can also be easily mobilised for utilisation at a variety of deployment sites.  Teledyne RDI engineers are finalising the ADCP design and expect to ship the first unit to AXYS in mid-September 2010. AXYS engineers will then perform integration and test activities to ensure compliance with all quality assurance requirements. This first integrated buoy will be... (read more)
2010-08-10 02:05:02

Unmanned Vehicle Deploys ADCP Mooring Near Calving Ice Cliff

Global concern about rising sea levels has thrust increasing loss of glaciers and ice sheets into public attention. A key uncertainty in projections of sea level rise is the rate of ice loss at the seaward margin of glaciers. The glaciers of Greenland and Alaska that reach the sea have therefore received increased scientific notice. Yet the ways in which warm ocean water interacts with and erodes the face of these glaciers have been largely unobserved. Difficult and Dangerous Operating near an ice cliff that is actively calving icebergs - above and below the water line - is both difficult... (read more)
2019-06-10 10:46:22

Successful Deployment and Recovery of 50th ADCP

UK metocean survey contractor Partrac has been deploying ADCPs in support of the tidal and wave energy sector since 2008. The recent recovery of one unit from the Inner Sound of the Pentland Firth in the UK marks the 50th successful deployment and recovery completed by Partrac at tidal energy sites. This milestone has been reached thanks to a dedicated marine team who have focused on every detail of acquiring ADCP data in such complex and dynamic regions. The team has worked tirelessly through every aspect of the projects, developing the equipment and methodology required that has led to such... (read more)
2013-07-09 11:13:33

Technology in Focus: Acoustic Doppler Current Profilers (ADCP)

Widespread Applications Stem from Diverse Measurement Capabilities
Rather than a spinning propeller, the Acoustic Doppler Current Profiler (ADCP) – just like dolphins and bats – uses sound to explore its environment. Operating underwater, the method works like hand-held radars used by police to catch speeding motorists. This article explains the technique of this frequently used type of instrument and some of its applications. A sound burst is emitted by the ADCP along beams angled downward. Echoes are returned due to scattering off particles carried by water currents. A second burst can be used to track movement over the seabed. By analysing these sound echoes, the ADCP makes... (read more)
2017-01-25 08:53:33

RiverPro ADCP and Q-View QA/QC Software Launched

US-based Teledyne RD Instruments has released two products designed for the Water Resources community: the RiverPro Acoustic Doppler Current Profiler (ADCP) and Q-View Data QA/QC software. The 1200kHz RiverPro ADCP has been designed to quickly and accurately measure the flow and discharge of moving water in shallow rivers and streams, ranging from 20cm to 25m in depth. This discharge measurement system is the latest addition to TRDI’s line of ADCPs for Water Resources professionals, suited for a wide range of applications including river hydrology, environmental impact and fisheries studies, and bridge scour monitoring. The RiverPro ADCP utilises a 20 degree... (read more)
2014-08-19 11:44:05

New Features Added to Teledyne RDI's Sentinel V ADCP

Teledyne RD Instruments (TRDI) has released two new features for its Sentinel V Acoustic Doppler Current Profiler (ADCP). The first feature is an option for bottom-tracking for moving boat applications. The second feature is new utilities software to interface with TRDI’s existing VMDAS software program to simplify vessel-mounted data applications. Originally designed for self-contained current profiling and waves measurement applications, the ADCP’s functionality was recently expanded to allow for real-time applications at data rates of up to 16Hz. The 5-beam Sentinel V represents Teledyne RDI’s next-gen family of ADCPs. With profiling ranges from <1m to >150m and a 200m depth... (read more)
2017-11-13 09:00:45

ADCP in Slocum Glider to Support Ocean Observatories Initiative

Engineering and field work is underway to test the full integration of Teledyne RDI’s Acoustic Doppler Current Profiler (ADCP) into the Teledyne Webb Research Slocum Glider. In 2011, Teledyne Webb Research was selected by The Consortium for Ocean Leadership and the Woods Hole Oceanographic Institution (WHOI) to provide coastal G2 Slocum gliders for the Ocean Observatories Initiative (OOI). The gliders will support the Pioneer and the Endurance Arrays of the OOI's Coastal and Global Scale Nodes (CGSN). Teledyne Webb Research’s Slocum G2 gliders are designed for long deployment endurance with the ability to manoeuvre and operate where the total water... (read more)
2012-03-23 12:57:23
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