Zoom on environmental opportunities

Zoom on LCA outcomes

The LCA undertaken in the CEAMaS project has been undertaken in compliance with the international ISO standard. The most significant conclusions regarding LCA results and sediment reuse options are as follows:

  • LCA gives interesting outcomes to identify process impacts and help ecodesign of these processes
  • Common trends show that
    • The use of additives (e.g. cement, lime…) have strong impacts on LCA
    • The energy consumption (e.g. electricity, fuel…) used for sediment transportation (link with distance) have a very significant impact on LCA.
  • Impacts of reuse options versus re-location at sea or dumping at sea can be positive (depending on the local condition and the processes selected)
  • Results interpretation is complex and clearly depends on the hypotheses made
  • Sediment management is very specific for each site and limits the possibility of comparing two local solutions:
    • Geography is specific (e.g. distance to disposal site, distance to quarry, urbanisation…)
    • Process depends on sediment characteristics
  • LCA methodologies have some limits when applied to sediment management:
    • Toxicity of sediment is a key factor for disposal but the dynamics of toxicity are difficult to take into account in the LCA
    • The local constraints (quarry materials availability, disposal site opening possibilities…) are not taken into account in the LCA
    • The initial risks (environmental, flooding…) motivating the requirement to dredge are not taken into account.
  • LCA is a multi-criteria decision tool to use to share for local scenarios optimisation and discussion but has to be completed in conjunction with other analyses to take social and economic impacts and benefits such as local environmental issues into consideration.

Download slideshow “Life Cycle Assessment (LCA) applied to sediment reuse

 

Some Impacts of Reuse Applications on EU Environmental Policy

This report presents information on the impacts of two specific reuse applications for sediments on EU environmental policies.  The applications presented are reuse at sea as part of a coastal defence strategy and the ‘Room for the River’ Project.  Both projects are innovative in the international context of dredge sediment management, have been applied in the Netherlands and illustrate some imaginative approaches to providing a beneficial use for dredged sediment.

Each of the two case studies/projects is presented including an overview of the project and the sediment management approach implemented the volumes of sediment involved and the impacts of the sediment management strategies implemented.

Download the report “Evaluation of the impacts of reuse applications on other EU environmental policies