Search results for: turbidity

445 results

A list of search results

  • 26 May 2020

    The latest CEDA Information Paper is discussing crucial concepts for setting turbidity limits, which allow for cost-effective dredging operations and also protect the environment. “In 2016, the CEDA Environment Commission (CEC) conducted a survey, of companies and organisations working with dredging, to investigate which environmental turbidity limits existed for dredging projects, how they were set, and how […]

  • 9 July 2018
    Business & Finance, Equipment, Technology

    The working group on turbidity limits (WGETL) has started its work, Central Dredging Association (CEDA) said in its latest announcement.  “Turbidity limits are often encountered by the dredging industry around the world and often significant resources are used to comply with turbidity limits. It is therefore very important that the imposed turbidity limits are optimized to […]

  • 25 December 2018
    Business & Finance, Equipment, Technology

    Cowes Harbor Commission’s (CHC) harbor turbidity monitoring equipment is in the process of being upgraded to enable automatic data transmission instead of the current manual data collection, reports the CHC. CHC set up a long-term program to monitor the turbidity of the estuary in November 2015. This turbidity monitoring complements an annual audit of bed-level […]

  • 28 February 2019
    Business & Finance

    Work is well underway on the latest CEDA information paper on guidelines for assessing and evaluating environmental turbidity limits for dredging.  The main aim of the paper is to facilitate knowledge exchange on the topic, along with an assessment of which parameters should be included in the evaluation at a local level both in terms […]

  • 2 July 2015
    Business & Finance, Equipment, Technology

    The International Association of Dredging Contractors (IADC) has just released its latest ‘Facts About’ publication, named ‘Turbidity and Dredging’. ‘Facts About’ is a series of concise easy-to-read leaflets which give an effective overview of essential facts about specific dredging and maritime construction subjects. Each leaflet provides a kind of ‘management summary’ for stakeholders who need […]

  • 6 August 2020
    Infrastructure

    The International Association of Dredging Companies’ (IADC) latest edition of their Terra et Aqua magazine featured a very interesting article named ‘Assessing and evaluating environmental turbidity limits for dredging’. The maintenance and development of ports, harbors and waterways requires dredging, a process which relocates large volumes of sediment. A method to set limits on the […]

  • 17 October 2019
    Business & Finance, Equipment, Technology

    Turner Designs, a California based provider of sensitive fluorometers for environmental and industrial uses, has introduced a new turbidity sensor with a minimum detection limit of 0.05NTU and a maximum range of 500NTU.   “Turbidity measurements at very low levels of detection can be of great importance to those interested in harbor dredging, underground pipeline […]

  • 21 May 2019
    Business & Finance, Equipment, Technology

    In the latest edition of their Terra et Aqua magazine, the International Association of Dredging Companies (IADC) put a special spotlight on the challenges of optical backscatter monitoring in mixed sediment environments. Optical backscatter instruments (OBS) are very popular instruments for measuring suspended sediments in the field. In this IADC article, an analysis is given based […]

  • 5 January 2012

    High spring tides over the Christmas period caused Gladstone Ports Corporation (GPC) to implement its Turbidity Management Plan for the Western Basin Dredging and Disposal Project. “The Turbidity Management plan (TMP) was implemented over the Christmas Boxing Day period to minimize the impact of dredging on the high spring tides,” Mr Zussino said. “We anticipated […]

  • 11 January 2012

    Turbidity levels in the Western Basin of Gladstone harbour have been increasing in recent days. Water quality monitoring systems have recorded levels at QE4 (at the northern end of the bund wall) above the limits set out in the project approvals. This has meant a temporary suspension of cutter suction dredging has been put in […]

  • 4 May 2012

    Gladstone Ports Corporation (GPC) has received confirmation from the Department of Environment and Heritage Protection (EHP) that some trigger values for turbidity will be raised. The decision comes after an extensive review of additional data by the regulator to better reflect the background turbidity levels. Naturally occurring turbidity prior to dredging commencing was analysed to […]

  • 22 June 2020
    Environment

    Dredging is essential for the maintenance and development of ports, harbours and waterways to allow for safe navigation, remediation and flood management. The process, which relocates large volumes of sediment, can be accompanied by the release of suspended sediments into the water column referred to as sediment plumes. In its summer issue of the Terra […]

  • 4 March 2016
    Business & Finance, Equipment, Technology

    Aquatec Group has just announced the introduction of 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 […]

  • 16 June 2015
    Business & Finance, Project & Tenders

    The CT Department of Energy and Environmental Protection together with TRC, the firm conducting the cleanup work for Exide, has just released the June update on the Mill River cleanup project in Fairfield, Connecticut. The contractor is currently in the process of dredging, dewatering the sediment, treating the filtrate water from the dewatering process, and discharging treated water back […]

  • 25 January 2012

    As part of the adaptive approach to manage the dredging project, a voluntary suspension of cutter suction dredging is in place. Yesterday, cutter suction dredging operations were stopped. The decision was taken in response to high turbidity recordings in the Western Basin to allow turbidity levels to return to normal as soon as possible. All […]

  • 29 September 2016
    Business & Finance, Equipment, Technology

    MacArtney’s German subsidiary, MBT GmbH, has manufactured a turbidity monitoring buoy, which is intended for deployment for accompanying environmental monitoring during dredging. Being deployed as a surface buoy, the compact sized, autonomous buoy system intended for determining turbidity in coastal water areas consists of a yellow buoy corpus made from durable GRP, a turbidity sensor, […]

  • 10 January 2012

    The Department of Environment and Resource Management (DERM) has directed contractors dredging on behalf of Gladstone Ports Corporation (GPC) to immediately cease operation of the cutter suction dredge in Gladstone Harbour. DERM Director-General Jim Reeves said that an Environmental Protection Order was issued yesterday following evidence of high levels of turbidity at a monitoring site […]

  • 4 January 2012

    Gladstone Ports Corporation blames toxic turbidity in World Heritage Area on spring tide loophole. The Queensland Greens have called on the Department of Environment and Resource Management to amend Gladstone Ports Corporation environmental licence conditions so that it excludes the natural variation clause and high turbidity is appropriately managed when turbidity levels are exceeded.  “Turbidity […]

  • 23 January 2012

    The seasonal king tides of 4.48m coupled with extremely low tides of 0.61m, and strong winds are contributing to natural water turbidity in Gladstone Harbour. The Western Basin Dredging and Disposal Project has put the Turbidity Management Plan in action to assist in mitigating these natural variations. The TMP reduces Al Mahaar Cutter Suction dredging […]

  • 4 May 2017
    Business & Finance, Equipment, Technology

    Royal IHC has just released this very interesting video named ‘Tackling turbidity and reducing maintenance costs with Royal IHC’s Plumigator® overflow’. “Our continuous focus on innovation has resulted in an upgraded version of the telescopic overflow. The patented Plumigator® overflow tackles issues caused by the overflow process,” said Royal IHC. This solution not only offers […]

  • 28 November 2012
    Business & Finance

    Environmetrics Australia has announced the development of a suite of models for the prediction of water column turbidity and benthic photosynthetically active radiation (PAR) for time periods of hours to months into the future. This unique capability is the result of years of extensive R&D in support of improved environmental decision-making for major dredging projects […]

  • 19 January 2012

    Gladstone Ports Corporation (GPC) has resumed normal dredging operations in the Western Basin after receiving notification from the Queensland Department of Environment and Resource Management (DERM). The temporary suspension of cutter suction dredging was put in place on the 9th January following high recordings of turbidity in the Gladstone harbour. The suspension was lifted around […]

  • 3 July 2018
    Business & Finance, Equipment, Technology

    Ocean Scientific International Ltd (OSIL) has provided construction company Dragados UK with a turbidity monitoring solution to report on the dredging activities of the Aberdeen Harbor Expansion Project. The UK based provider of tailored integrated systems for environmental monitoring has supplied two 1.9m buoy platforms, equipped with standalone turbidity sensors, and were on-site for the […]

  • 6 June 2012

    Gladstone Ports Corporation (GPC) is not breaching turbidity levels in the Gladstone harbour, nature is. Western Basin Dredging and Disposal Project (WBDDP) Manager Peter O’Sullivan said all current data reveals the current Spring and King tides primarily drive turbidity levels in the Gladstone harbour. “Turbidity is a natural phenomenon that occurs in most bodies of […]

  • 3 April 2015
    Business & Finance, Project & Tenders

    Exide Group has returned and resumed sediment dredging activities in the Mill River in Fairfield, following the winter shutdown.   The winter shut‐down occurred from mid‐December to early‐March. Exide returned to the site on March 3rd 2015, and completed remobilization activities, including restarting the water treatment plant, and positioning the turbidity curtains and sediment conveyance pipeline in […]

  • 3 August 2020

    Emily Twiggs, Senior Project Scientist, EOMAP Australia https://www.linkedin.com/in/emily-twiggs-796989b5/ www.eomap.com https://www.portandcoastalsolutions.com https://nqbp.com.au EOMAP applies its satellite-derived turbidity monitoring capabilities to dredging programs run by the North Queensland Bulk Ports Corporation (NQBP). Turbidity plumes are stirred-up sediment which can be transported long distances by currents. Understanding the full spatial and temporal variability of turbidity, whether from natural […]