CONSIDERATIONS REGARDING ECOLOGICAL RESTORATION OF DEGRADED RIVERBED

Rezumat

The ecological restoration of the secondary riverbeds is a necessity for ensuring the living conditions of the aquatic habitat. At the European level, ecological works have been carried out in the last period of time that restore the natural environment from the secondary riverbeds. Ecological restoration of riverbeds is a complex process that causes the restoration of an ecosystem that has been partially or totally degraded in the aquatic environment or in the riparian area. The research carried out on the Moldova river indicated the need for designing and carrying out ecological restoration works. Research carried out on a river sector, where two rivers (main and secondary) are present, revealed a series of changes in the aquatic and riparian environment. The changes were given by a set of natural and anthropogenic factors. The secondary riverbed is permanently degraded by intermittent water supply and human action. The intermittent feeding of the secondary riverbed determines the appearance of an aerobic-anaerobic regime, with negative influences on the habitat. The ecological restoration works are applied on the structural components of the riverbed, aiming to create an optimal hydraulic regime for the aquatic habitat.