Knowledge centre

    What value does a marine contractor create for its stakeholders?

    Externalities traditionally fall beyond the scope of contractors, leading to stakeholder value creation and corporate value creation being viewed as separate concepts The time has come to internalise externalities as a force of corporate value...
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    Interview: Mark van Koningsveld ‘If you focus on primary objectives only, then you will pay in sustainability’

    Mark van Koningsveld’s quest for a sustainable dredging industry takes to the front of the classroom as he begins his new role as professor of Ports & Waterways at TU...
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    Dredging for Sustainable Infrastructure

    Dredging for Sustainable Infrastructure

    The book Dredging for Sustainable Infrastructure gives state-of-the-art guidance on how to design, implement and manage a water infrastructure project with a dredging component to project owners, regulators, consultants, designers and...
    Publication

    Interview: Tiedo Vellinga – ‘There should be a shift in the way of thinking about designing infrastructure’

    A newly appointed Professor Emeritus at TU Delft and former project manager at the Port of Rotterdam Authority, Tiedo Vellinga discusses his role as a bridge between academia and practice and its impact on the direction of port...
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    How can the dredging sector join the global shift towards sustainability?

    How can the dredging sector join the global shift towards sustainability?

    A paradigm shift is being increasingly embraced within the dredging industry The traditional engineering approach is becoming a holistic approach in which the ecosystem is leading and values for people, profit and planet are integrated in an...
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    Articles

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    Ecosystem Services

    Ecosystem services: Towards integrated marine infrastructure project optimisation

    Ecosystem services (ES) are the benefits that humans derive from nature (MEA 2005, TEEB 2010) WHAT ARE ECOSYSTEM SERVICES The ecosystem services framework forms the bridge between ecosystems and human wellbeing It shows how humans depend on...
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    PDF document | 7 MB

    Environmental Monitoring and Management Plans

    Environmental Monitoring and Management Plans

    Environmental management of marine reclamation works helps manage impacts of dredging and ensures that a project’s quality objectives are met Environmental management of marine reclamation works helps manage impacts of dredging and ensures that...
    ReefGuard: A Scientific Approach to Active Reef Rehabilitation

    ReefGuard: A Scientific Approach to Active Reef Rehabilitation

    ReefGuard, a mobile coral breeding facility provides a highly controlled environment to aid in integrating the breeding and outplanting of corals This article gives a detailed look into how proven small-scale coral breeding techniques can be...
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    Articles

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    Remediation dredging

    Remediation dredging (Contaminated sediments)

    Remediation dredging is the name given to clean-up operations specifically aimed at removing contaminated sediments that can endanger marine and human life Location of contaminated sediments Contaminated sediments are often found in industrialised...
    Video webinar Ecology and Dredging

    Ecology and Dredging (on demand)

    Because dredging projects impact a wide variety of stakeholders, a fundamental knowledge of the interaction of ecology and dredging is to everyone’s benefit SUMMARY The word Ecology comes from the Greek words ‘oikos’ and ‘logos’ meaning...
    Webinar

    Turbidity & Dredging

    “Facts About Turbidity & Dredging” describes the characteristics of turbidity and the importance of measuring and monitoring turbidity during dredging Turbidity is an optical quality of water and describes how clear or transparent water...
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    Facts About

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    “Facts About Building with Nature” describes an approach to planning and designing infrastructure that respects nature and uses natural forces proactively.

    Building with Nature

    “Facts About Building with Nature” describes an approach to planning and designing infrastructure that respects nature and uses natural forces proactively Building with Nature solutions focus on sustainable development and aimed to create...
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    Facts About

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    “Facts About Environmental Impact Assessments” describes how, when and why to evaluate the environmental situation prior to the start of a dredging project.

    Environmental Impact Assessments

    “Facts About Environmental Impact Assessments” describes how, when and why to evaluate the environmental situation prior to the start of a dredging project Most dredging projects nowadays require some sort of Environmental Impact Assessment...
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    Facts About

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    “Facts About Environmental Equipment” describes equipment specifically developed to remove and remediate contaminated sediments and protect the nearby waters.

    Environmental Equipment

    “Facts About Environmental Equipment” describes equipment specifically developed to remove and remediate contaminated sediments and protect the nearby waters Use of the term “environmental” or “remediation” dredging has evolved to...
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    Facts About

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    “Facts About Dredging Management Practices for the Environment” describes how to create management guidance for improving environmental performance.

    Dredging Management Practices for the Environment

    “Facts About Dredging Management Practices for the Environment” describes how to create management guidance for improving environmental performance Whilst dredging is required to develop and maintain navigation infrastructures, dredging can...
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    Facts About

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    “Facts About Deltas and Climate Change” describes the importance of deltas as population hubs for trade and their added vulnerability as sea levels rise.

    Deltas and Climate Change

    “Facts About Deltas and Climate Change” describes the importance of deltas as population hubs for trade and their added vulnerability as sea levels rise Throughout human history river deltas have attracted people and today is no different...
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    Facts About

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    Environmental Dredging of a Chromium Contaminated Fjord

    Environmental Dredging of a Chromium Contaminated Fjord

    The sediments in Valdemarsviken fjord in Sweden were contaminated with chromium from the discharge of untreated wastewater from tannery operations decades ago The contaminated sediments were dredged, dewatered, solidified and placed as a engineered...
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    Articles

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    Long-Term Effects of Maintenance Dredging on Turbidity

    Long-Term Effects of Maintenance Dredging on Turbidity

    Maintenance dredging is required in many estuaries worldwide to provide access to ports and inland waterways A newly developed dredging module is able to capture the two fundamental processes necessary to model the long-term impacts of dredging on...
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    Articles

    PDF document | 625 KB

    Environmental Equipment

    Environmental Equipment

    Environmental dredging equipment is specially designed or adapted to remediate waterways that contain contaminated sediments Work method of Environmental Equipment The work method of each environmental dredger is specific to the equipment However,...

    Mangroves

    Mangroves are trees or shrubs growing in tropical coastal swamps whose strong, tangled roots provide natural protection against waves and storms Mangrove habitats are unique Mangrove habitats are tropical coastal swamps that usually flood during...

    Wetlands

    Wetlands are a natural coastal habitat with unique species of flora and fauna that protect against erosion and flooding of nearby communities Wetlands ecosystem Although a small percentage of the earth’s surface, wetlands contain important...
    Turbidity

    Turbidity

    Turbidity is a leading factor in causing underwater disturbances to marine life and must be minimised and monitored during a dredging project Turbidity, an optical quality Turbidity is an optical quality of water and describes how clear or cloudy...

    Sustainability

    Sustainability means acting in a way that is not harmful to the planet, preserves natural resources, and thus supports long-term ecological balance Renewables and non-renewables One guideline to sustainability defines three aspects of resources:...

    Underwater Sound

    Underwater sound created by dredging equipment below the water surface can impact marine life and requires careful evaluation and monitoring Why is underwater sound an issue Aquatic fauna such as fish and marine mammals often communicate through...

    Management Practices for the Environment

    Management Practices for the Environment help maximise both environmental and economic benefits and thus the success of dredging activities The need for management While dredging is required to develop and maintain navigation infrastructure...

    Flood Defence

    Flood defence aims to protect low-lying communities close to oceans and rivers from sudden storms and floods Storm surge prevention The best way to approach flood defence is by establishing systems, which try to assess the predictability of major...

    Environmental Monitoring

    Environmental monitoring is used to protect marine fauna and flora and should be conducted before, during and after a dredging operation Changes to the environment Dredging and maritime construction operations are a necessary element in the...

    Environmental Impact Assessment

    An Environmental Impact Assessment (EIA) provides stakeholders with environmental information about a specific project site General guidelines Environmental Impact Assessments are generally speaking compulsory and follow strict regulatory...

    Ecosystem Services

    Ecosystem Services is a concept for assigning a monetary value to both a commercial activity and the natural environs where the activity is occurring Ecosystems An ecosystem is defined as humans, animals and plants found in a particular location...

    Deltas

    Deltas are low-lying land areas at the mouths of rivers, making them fertile areas attractive for people to live and work and yet extremely vulnerable Low-lying and vulnerable Today deltas belong to the most densely populated areas in the world,...

    Coral Reefs

    Coral reefs are valuable and sensitive natural assets that require special attention when dredging operations are planned Natural protection These reefs act as natural barriers, mitigating the action of ocean waves and erosion which threaten...

    Confined Disposal Facilities

    Confined Disposal Facilities are an important solution for managing contaminated sediments that cannot be sufficiently cleaned for re-use Dredged material disposal The appropriate disposal of dredged material from navigation, maintenance and...

    Coastal Protection

    Coastal defence of beaches, cities and communities located close to oceans and seas is a primary activity of the dredging industry Vulnerable communities According to the United Nations Environmental Programme (UNEP), half the world's population...
    CO2 & Other Emissions / Greenhouse Gases

    CO2 & Other Emissions / Greenhouse Gases

    CO2 and other emissions / Greenhouse Gases – including from dredging equipment – must be controlled to help mitigate climate change, which requires innovative research Intergovernmental Panel on Climate Change The Intergovernmental Panel on...

    Climate Change

    Climate change threats including storms, rising sea levels and flooding have stimulated the dredging industry to find new sustainable solutions Evidence-based science The scientific community has confirmed that the Earth's climate is changing...

    Building with Nature

    “Building with Nature” is a method, in which the starting point is to seek solutions that integrate environment and maritime infrastructure construction Eco-dynamic engineering The Building with Nature approach means evaluating the natural...

    Environment

    The environment and its protection are always priorities during dredging projects, but dredging can also be a pro-active tool to improve the environment Dredging is not a “one size fits all” activity Each project must be carefully weighed and...

    Environmental Aspects of Dredging

    2008, hardcover, 400 pp, Taylor & Francis, ISBN: 978-0-41545-0805 This book is out of print and has been replaced with an updated book To read more about Dredging for Sustainable Infrastructure, click here Based on the famous CEDA/IADC...
    Publication
    Building with Nature is an innovative approach that combines natural processes with innovative engineering methods to realise sustainable projects.

    Building with Nature: Sustainable Protection of Mangrove Coasts

    Building with Nature is an innovative approach that combines natural processes with innovative engineering methods to realise sustainable projects Permeable dams are being utilised as part of a Building with Nature solution to help restore the...
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    Articles

    PDF document | 2 MB

    Dredging Sound Levels, Numerical Modelling and Environmental Impact Assessment (EIA)

    Dredging Sound Levels, Numerical Modelling and Environmental Impact Assessment (EIA)

    Underwater sound from anthropogenic sources and its potential adverse effects on the marine environment is a topic of much global interest This article gives an overview of known sound source levels for various dredging equipment and activities and...
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    Articles

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    Creating Horseshoe Bend Island, Atchafalaya River, Louisiana

    Creating Horseshoe Bend Island, Atchafalaya River, Louisiana

    As mounds of dredged material placed upriver are dispersed by the river’s current, an island with enriched wildlife has...
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    Articles

    PDF document | 2 MB

    Aquapuncture©: Sustainable Future of Inland Waterways

    Aquapuncture©: Sustainable Future of Inland Waterways

    Revitalising and redesigning inland water transportation routes and recreational waterfronts transforms them into vital and viable economic and social...
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    Articles

    PDF document | 4 MB

    Faunaguard: A Scientific Method for Deterring Marine Fauna

    Faunaguard: A Scientific Method for Deterring Marine Fauna

    Marine fauna is sensitive to underwater dredging sounds Scientific research indicates that inducing the fauna to leave an area temporarily before the start of a project minimises serious impacts And the marine life returns when the dredging is...
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    Articles

    PDF document | 1 MB

    Reducing Shoaling in the Texas GIWW and Erosion of Barrier Islands Along West Galveston Bay

    Reducing Shoaling in the Texas GIWW and Erosion of Barrier Islands Along West Galveston Bay

    How to protect the environment of the Texas Gulf Intracoastal Waterway and preserve a crucial economic link as...
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    Articles

    PDF document | 3 MB

    Dredging in New Caledonia at a Unesco-IUCN World Heritage Site with Care for Nature

    Dredging in New Caledonia at a Unesco-IUCN World Heritage Site with Care for Nature

    Dredging for a new port complex in a remarkable, protected marine environment required adherence to very specific thresholds and an intensive Environmental Management Plan (EMP) that included mobile monitoring as well as daily visual observations of...
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    Articles

    PDF document | 576 KB

    Implementing “Building with Nature” in Complex Governance Situations

    Implementing “Building with Nature” in Complex Governance Situations

    Decision-making for infrastructure depends on a mix of local culture, the political situation and uncertainties related to the project’s complexity To explain the process of gaining the confidence of stakeholders, two cases of “Building with...
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    Articles

    PDF document | 383 KB

    Safe Disposal of Dredged Material in a Sensitive Environment

    Safe Disposal of Dredged Material in a Sensitive Environment

    A state-of-the-art 3D plume model, used at the Ras Laffan Port Expansion project, simulates alternative disposal scenarios and helps develop Safe Disposal...
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    Articles

    PDF document | 567 KB

    Communicating about Dredging in a Precious Environment: Port of Melbourne Channel Deepening Project

    Communicating about Dredging in a Precious Environment: Port of Melbourne Channel Deepening Project

    Protests from some members of the public and by local media led both the client and contractor to work together to reassess and improve their communications with...
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    Articles

    PDF document | 2 MB

    Dredging Management Practices for the Environment: A Structured Selection Approach

    Dredging Management Practices for the Environment: A Structured Selection Approach

    PIANC Working Group Envicom 13 report distinguishes between Management Practices and Best MPs in providing environmental protection during dredging...
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    Articles

    PDF document | 2 MB

    Possibilities of Minimising Sedimentation in Harbours in a Brackish Tidal Environment

    Possibilities of Minimising Sedimentation in Harbours in a Brackish Tidal Environment

    By studying the different mechanisms of sediment movement, solutions were developed to reduce sedimentation in harbours, and thus reduce the need for maintenance...
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    Articles

    PDF document | 1 MB

    Framework for Research Leading to Improved Assessment of Dredge Generated Plumes

    Framework for Research Leading to Improved Assessment of Dredge Generated Plumes

    There are two types of driving force that urge us to assess the effects of dredge-generated plumes, a genuine concern for the environment and the regulations that forbid us to dredge unless we can demonstrate that harm will not be caused to the...
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    PDF document | 314 KB

    Dredging in a Changing Environment

    Dredging in a Changing Environment

    "Coevolution" and the "Triple P Performance" principle are applied as guidelines for modern companies - including the dredging industry - to create legitimacy for...
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    PDF document | 350 KB

    Kazakhstan, Offshore Exploration in the Caspian Sea

    Kazakhstan, Offshore Exploration in the Caspian Sea

    The real challenges of building underwater berms in the Caspian Sea were the sensitive environment, a harsh climate, complex local regulations and deep cultural...
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    Articles

    PDF document | 244 KB

    Environmental Management Framework for Ports and Related Industries

    Environmental Management Framework for Ports and Related Industries

    A systematic framework is presented for developing policy, managing, implementing and auditing the impact of ports on the...
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    PDF document | 197 KB