The sites currently being considered for the exploitation of tidal current energy using tidal turbines are generally areas of limited depth (30 m to 50 m) characterized by high intensity currents. At such sites, the flow in the water slice is most often turbulent due to variations in bathymetry, bottom roughness and other kinematic and dynamic phenomena related in particular to the interaction with the swell. This flow turbulence is relatively unknown, particularly at metric and decametric scales that can alter the response of machines, both in terms of production and structural fatigue.