The general objective shall be measures to: Maintaining and improving the conservation status of species and habitats of community importance in the Danube Delta. The system of channels supplying the aquatic complex concerned by the restoration works of the hydrological regime are also diurnal and seasonal migration horses for all fish species of Community importance. The ecological reconstruction works by restoring the bed and removing alluvial deposits will also restore the migration corridors and will maintain both the interconnectivity of the habitats of community interest and the spatial distribution of the species of community interest according to their natural area. Reducing the effects of hydromorphological pressures on watercourses in order to protect biodiversity (passages for crossing the ichthyofauna for watercourse cross-barring works, restoration of wetlands, restoration of bed and relief from the floodplain of the river)