Fish migration aid i.e. fish ladder, for use in e.g. water vortex power plant for passage of fishes, has chute base, where aid is designed as chute between base of bottom water region and recessed region of reservoir bottom

摘要

The aid has a continuously extending chute base provided with a continuous rough surface. The aid is designed as a chute (10) between a base of a bottom water region and a recessed region (13) of a reservoir bottom (8). The aid has an inclination ranging from 2.5 to 5 percentage. The chute base is occupied with a natural substrate. A slowly rotating rotor (6) with a perpendicular rotor axis (7) is arranged in a rotary reservoir. The bottom water region with a bottom water channel (5) is provided below the reservoir. A drain opening (9) is provided in the bottom in a region of the axis.