Study of greenhouse gas emissions during ripening of dredged marine sediment

As increasing greenhouse gas (GHG) emissions contribute to global warming, it is becoming more important to consider the carbon footprint of hydraulic engineering projects. This carbon footprint is more complex than previously thought however, as it can also include the carbon dynamics of the sediments from which projects are built. The purpose of this study was to provide a first approximation from sediment-related GHG emissions of dredged sediments. Using the case study of the clay ripening pilot project (‘Kleirijperij’) in Groningen, the Netherlands, one phase of sediment processing was examined: the ripening of dredged sediments for use as a clay material in dyke construction.

Creating mangrove habitat for shoreline protection

Over the past decades, there has been a growing interest in exploring innovative ways to minimise the environmental footprint of coastal developments and in nature-based approaches for shoreline protection. At Mubarraz Island near Abu Dhabi (UAE), an international oil company beneficially reused ~12 million m³ of dredged material to protect pipelines, construct a causeway and create mangrove habitat to manage coastal erosion. This ‘Working with Nature’ approach has provided a cost-effective nature-based solution for shoreline protection, with added benefits for biodiversity conservation.

Monitoring of settling and consolidation of mud after water injection dredging in the Calandkanaal

As regular maintenance and relocation of sediment deposits are highly expensive, Port authorities seek more efficient solutions for reducing the costs and CO2 emissions of maintenance dredging. One solution, water injection dredging (WID), is carried out for maintaining the sediment deposits which predominantly consist of clay and silt. WID has been proven to be a cheaper solution by leaving the sediment in place, eliminating substantial costs for relocation of the dredged sediment.

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 contractors.

Towards a Green Maritime Technology

The growing awareness of the need for diversified energy sources has collided with the maritime industry. Research initiative JOULES was created to assess the viability of a vessel being 100 per cent green by increasing efficiency and reducing emissions.

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.

Reduction of SOx Emissions for Dredging Vessels (EuDA Information Paper)
Reduction of SOx Emissions for Dredging Vessels (EuDA Information Paper)

New IMO emissions regulations are being adopted each year. But dredging vessels are more than ships. They are work-boats and legislators must keep that in mind.

Smart, Sustainable: a Life Cycle Approach to Fuel Economy as Applied to Dredging Vessels
Smart, Sustainable: a Life Cycle Approach to Fuel Economy as Applied to Dredging Vessels

No time to wait for policymakers. Dredging contractors need to act now and consider energy efficiency from beginning to end: from ship design to operations to decommissioning.