Sustainable Environmental Treatment and Reuse of Marine Sediment

WP 1 - Overview of the dredging in the Channel

ACTIONS AND OBJECTIVES

With a better knowledge of the dredging methods, the disposal at sea sites, the regulation, and the social and environmental aspects, we want to :

Define sustainable practices regarding the management of dredging operations
Suggest solutions of mutualization
Suggest communication solutions to improve the image of the dredging operations

Study 1 - Dredging methods and sediments re-use opportunities

Different ways to re-use the dredged sediments in France and England :Beach nourishment / Beach Sub layer road / Dykes for coastal protection and against flooding / Agricultural amendment / Saltmarsh creation or Mudflat enhancement / Career filling /Civil engineering (bricks, cereamic)

but : only isolated actions on small volumes / Few opportunities and important cost
In France, specific regulation regarding each one Sediment status : Wastes (regulation constraint)

WP 1 - Overview of the dredging in the Channel-

Study of the frequency of the maintenance dredging in the local Channel Ports: 

Most ports dredge at least one time per year

Information required to define the mutualization potential (means and common contracts) before the dredging operations

WP 1 - Overview of the dredging in the Channel-

Destination of the Dredged sediments in the Channel local ports

Channel Volume
France (11 ports) 1 600 000 m3
England (11 ports) 566 000 m3

WP 1 - Overview of the dredging in the Channel-

Distance between the coast and the disposal at sea sites (nautic miles-NM)

The highest distance : 5 NM
But some of new sites will be certainly more far.
Ex. A permit was selected with a disposal at sea site at 15 NM from the port after 10 years of studies

WP 1 - Overview of the dredging in the Channel-

Comparison of the technics used in the Channel

mechanical
hydraulic
mixed
others

Study 2 : comparison between French and English regulations

 

Link to the complete study : French version / English version

Valorisation of the contaminated dredged sediments (CDS)- which difficulties?

Competitiveness of the CDS / Other material – need of a quality protocol;
Availability of the material?
Market near the port ? Transport cost and handling?
Refusal of use the CDS by some industrialists -> no wastes in their project. 

>>>There is a big interest to have a better knowledge of our sediment to develop new streams

 

Study 4 - Assessment of co-operation potential

objectives : find solutions for decrease the dredging costsof maintenance dredging (economic and regulatory feasability) of the Channel local ports

study in 5 phases : 
1. Inventory of the statutes of the English Channel ports
2.Inventory of the companies in charge of dredging operations in Europe and the Channel Area
3. Economic and legal feasibility in terms of joint purchase of dredging equipment
4. Economic and legal feasibility in terms of joint procurement
5. Comparison of options for cooperation