Fish ladder apparatus for fish for overcoming height difference between upper water and sub-water, has closure unit operated in open position such that fish passes through openings, and drive device generating closed flow through reservoir

摘要

The apparatus (1) has a reservoir (2) including openings (3-5) for fluidically connecting the closure units (11-13) to sub-water (6) or to the upper water (7). The closure unit is operated in a closed position such that the fish is blocked by the openings, and is operated in an open position such that the fish passes through the openings. A drive device generates a closed flow (20) through a portion of the reservoir. A steering device (21) is provided such that the water emerges from a height level through an outlet opening (16) from a flow channel (17). An independent claim is also included for a method for operating a fish ladder apparatus for fish for overcoming height difference between upper water and sub-water.