NOVELTY - The turbine (100) has an electric power generator operatively connected to a rotor assembly (110) and for generating electric power by rotation of the rotor assembly about a rotation axis (x). Blades define an aerodynamic profile in cross-section to increase fluid dynamic efficiency of the blades when the blades are immersed in the water flow. A support structure (120) keeps the rotation axis in a position horizontal and orthogonal to water flow. An n-th blade of first module is arranged with predetermined angular offset with respect to an n-th blade of second module next to the first module.    USE - Hydroelectric turbine for use at water basins for hydropower generation applications.    ADVANTAGE - The turbine provides presence of solid disks for connection between the central shaft and the blades such that dividing elements reduce weight of the structure during aeroelastic phenomena, which can create fatigue stresses that can damage the structure, so that the dividing elements offer reduced resistance against the water flow, thus increasing overall efficiency of the turbine. The turbine allows angular septum that is arched strip-like shaped to increase structural resistance. The turbine allows a floating structure to allow an easy handling of the turbine on the surface of a hydric basin. The turbine ensures possibility of displacing the rotor assembly at coordinate of depth optimal in terms of flow speed, thus maximizing electric power. The turbine maintains a rotation axis perpendicular to the direction of the hydric flow, allows higher maintainability, safety and portability, adjusts depth of riverbed, increases torque generated by the rotor assembly, increases hydrodynamic efficiency of the rotor assembly and reduces harmful aeroelastic effects to which the rotor assembly is submitted.    DESCRIPTION OF DRAWING(S) - The drawing shows a top perspective view of a support structure and a rotor assembly.    Rotation axis (x)    Hydroelectric turbine (100)    Rotor assembly (110)    Central shaft (119)    Support structure (120)    Arm (125)    Dividing element (130)