Under the contract of Delta “Camargue” and the Plan for the management of natural spaces in the environmental crown around the industrial-portuary area of Fos, the Grand Maritime Port of Marseille wishes to carry out hydraulic restoration works on the Camargua wetlands as well as the carrying out of scientific monitoring to evaluate the effect of the work carried out by studying the effectiveness of the different modes of hydraulic management. The aim is to move towards sustainable hydrological management reconciling Mediterranean biodiversity with cyngetic and pastoral uses at two natura 2000 sites “Le Grand Clos” and “Le Relai”.