Ifremer environment
Dredging and marine environment

Operations required to maintain access to port facilities involve the excavation and dredging of channels to preserve the specified draughts, and the subsequent disposal of spoils. The major portion of dredged materials is dumped at sea in dedicated authorized zones off the coast. This dumping potentially induces strong biological effects. However, current information remains limited regarding the fate of the sediment-bound contaminants or their potential effects.

“Dredging & marine environment” edited by Ifremer describes the different steps of the bottom-up predictive approach to be followed for compliance with French regulations and with the recommendations and guidelines of international conventions. The main instruments proposed herein to port managers include a method of risk analysis based on regulatory thresholds for the respective contaminants, assessment of overall toxicity via four selected bioassays, the I2EC index ("Index for Coastal Endofauna Evaluation"), and active biomonitoring programs of dumping sites. These operational tools are the outcome of efficient cooperation efforts between scientists, central administrations and port engineers from the main French harbours.

The book entitled “Dredging & marine environment” represents a digest of the three previous Ifremer publications in French.

Claude Alzieu editor.

Last update: 15/11/2005 Copyright : Ifremer