AUTOMATIC SWING FISHWAY APPARATUS

摘要

An automatic swing fishway apparatus comprising a hydraulic chamber provided in a bottom of a waterway which bypasses a dam and a fishway device body comprising a fishway portion provided above the hydraulic chamber and having a floor plate and a plurality of dividing walls provided vertically on the floor plate, and a sealed buoyant portion provided beneath the floor plate. The fishway device body is provided with a main shaft arranged at the downstream end of the fishway device body so that the fishway device body can rotate freely. An overflow weir is provided at the upstream end of the fishway device body and the hydraulic chamber is connected to an upstream end of the fishway device body through the overflow weir. An outflow port is provided for connecting the hydraulic chamber to a downstream waterway, and the inclination of the fishway device body is changed in accordance with a water level of said dam by equalizing an amount of water flowing over the overflow weir into the hydraulic chamber to an amount of water flowing from the hydraulic chamber via the outflow port.