Emu Survey for Thames Dredging

Emu Ltd, UK, has completed a study in the Thames Estuary to provide comparative data for a dredging programme. The Port of London Authority commissioned Emu to monitor background dissolved oxygen (DO2) and suspended sediment levels in support of a maintenance dredging project in the Princes Channel on the southern side of the Estuary. The Emu-gathered data will be compared with data gathered during dredging to determine the effect of dredging activity on the marine environment. The data was obtained from a custom-designed seabed-mounted frame with sensors positioned one metre above the seabed. (read more)
2003-10-25 12:00:00

TerraStar Positioning for Dredging Operations

DEME, Belgium, has commissioned TerraStar GNSS’s TerraStar-D Precise Point Positioning (PPP) service to support the worldwide near-shore operations of its multifunctional fleet of dredgers and auxiliary vessels. Operating in conjunction with Septentrio AsteRx2eL GNSS positioning and AsteRx2eH heading receivers, the TerraStar-D service will provide DEME’s vessel fleet with seamless high-precision decimetre-level accuracies using a combination of GPS and Glonass satellites to ensure faster levels of convergence and high update rates in the most demanding environments. Selection of the specialist service follows extensive trials under the auspices of DEME’s Survey Department during which recurring real-time accuracies were also shown to be... (read more)
2013-02-01 12:00:00

Echoscope Sonar for Dredging International

Unique Maritime Group of UAE has recently delivered two Echoscope 3D sonar to DI-MEDCO, a joint venture between Dredging International and Middle East Dredging Company, for the planned shore protection and harbour construction works of two artificial islands. The Echoscope, produced by CodaOctopus Products, is a sonar capable of producing real-time 3D imagery, enabling the operators of visualise underwater activity in 3D even in zero-visibility conditions. This latest delivery adds to Dredging International’s existing pool of Echoscope systems, further enabling the company to increase the efficiency of its operations. (read more)
2012-05-04 12:00:00

Dredging Industry more than Doubled

According to the just-released Dredging in Figures report, the drivers of dredging have developed favourably, though moderately, over the last decade. Despite this, total turnover in the dredging industry itself has more than doubled. The report examines why the dredging industry has grown faster than its drivers. The present document, issued in November 2012, focuses on the situation in 2011. The information includes data about the drivers of dredging – waterborne trade, urbanisation and demography, energy, tourism, climate change and coastal defence and the environment – as well as the turnover of the global dredging market per region and per... (read more)
2012-12-19 12:04:01

Wreck Monitoring in Dredging Operations

Multiple survey and positioning techniques for MV <i>Assi Eurolink</i>
The problems posed by the wrecked vessel Assi Eurolink called for unique solutions that have set a new benchmark in the way that similar wrecks are made safe. On 25th January 2003 a collision occurred between the Swedish vessel Seawheel Rhine and a Dutch freighter, the Assi Eurolink. The collision was within the shipping lane ‘Friesland Junction’, about 77 kilometres (48 miles) off the coast of the Dutch island of Terschelling. The Swedish ship Seawheel Rhine sustained visual damage to her bow above water line, but the ship was able to continue to Hamburg. However, the Assi Eurolink sank almost... (read more)
2008-01-01 01:00:00

Safe Dredging Around Coral Reefs

A new whitepaper 'Facts About Dredging Around Coral Reefs' gives a clear view of the importance of these natural phenomena, best technical practices to protect coral reefs and how to ensure that the economic and environmental aspects of a project are kept in balance. Strategic planning prior to dredging, Environmental Impact Assessments and Environmental Management Plans during the life-cycle of the project, along with elaborate monitoring plans, are essential to preserve coral reefs whilst still allowing a project to proceed.     Coral reefs are large, long-lived bio-geological structures that include all associated marine plants and animals. Although Coral Reefs... (read more)
2011-03-23 11:03:10

Dredging Seminar 35th Edition

Since dredging is an indispensable, but often misunderstood, tool in land reclamation projects, the International Association of Dredging Companies (IADC) has developed an ‘International Seminar on Dredging and Reclamation'. The seminar is continually updated for this 35th edition of the Seminar will be held in co-operation with the National University of Singapore and take place at the Grand Park City Hall Hotel in Singapore from Monday 8th to Friday 12th November 2010. The course is given by recognised experts from the world's leading dredging companies and is aimed at (future) project managers, project staff and decision makers in governments, port... (read more)
2010-08-03 04:50:48

Damen Dredging Equipment Acquires NAVGUARD

Damen Dredging Equipment has acquired the dealership of the software package NAVGUARD. This application software, which has especially been developed for hydrographic surveying and dredging operation control, is a valuable addition to the broad range of dredging instrumentation & automation Damen already offers. The NAVGUARD software package consists of various modules for positioning the dredger and its digging tool, for positioning survey launches, gathering depth-sounding data and for processing logged hydrographic data in the survey office. Using this software the dredging efficiency is enhanced, the dredging activities can be checked and maps and charts can be brought up to date... (read more)
2005-03-07 12:00:00

Seagrass Mitigation for Miami Harbour Dredging Project

CSA Ocean Sciences Inc. (CSA) has successfully completed the transplantation of over 115,000 seagrass plants into a newly filled dredge hole north of the Julia Tuttle Causeway in Miami, Florida, USA, as part of the overall environmental mitigation requirements for the deepening and widening of Miami Harbour. CSA was part of the Great Lakes Dredge and Dock LLC (GLDD) team that was awarded the prime contract by the U.S. Army Corps of Engineers. The “deep dredge” project took two years to complete and is the first federal navigation project in the southeast built to accommodate post-Panamax vessels. During August and... (read more)
2015-10-19 10:45:01

Sharp View at Dredging and Excavation Monitoring

Tritech’s latest product in the Gemini Multibeam range, the Gemini Narrow Beam Imager (NBI), has been used in extremely limited visibility conditions. The Gemini NBI was successfully used by Reef Subsea to monitor the trenched installation of 6-inch and 2-inch cables, while using controlled flow excavation techniques. The seabed conditions around the site varied considerably, however, even where there was high turbidity Reef was able to clearly monitor the cables using the device. With the increasing level of cables being laid in shallow water, where turbidity can be at its worst, the Gemini NBI has proven to be highly effective... (read more)
2013-10-18 10:30:45
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