Figure 5 : Estimates of dredging operations
data sources : Ifremer, Direction Départementale de l'Equipement (DDE),  Affaires Maritimes, 1997
data processing from Ifremer

The figure shows, in red, the leases concerned by the operation. In Etier de Perquis, 8 parcels make up a total surface area of 14.8 hectares, whereas in Coursière de Ronce, 67 parcels amount to 79 hectares. In Etier de Perquis, the first phase involved a surface to be dredged of 22000 m²  with an average sediment height of 0.7 metres, i.e., a volume of 15500 m³. In Coursière de Ronce, 50000 m² are involved, on a height of 1.6 metres, i.e., a volume of 81000 m³.

For more information, contact Jacques.Populus@ifremer.fr