Dadu River Company Began to Construct Asia’s Longest Bionic Fishway

On February 1, the fish passage facility of Jinchuan Hydropower Station of Dadu River Company, a subsidiary of CHN Energy, began construction, heralding the start of the building of Asia’s longest fishway featuring “artificial tunnel + natural river”. The project is expected to further improve ecological conservation of the Dadu River, protect biodiversity in the river basin, and contribute to the green development of the Dadu River.

The fish passage facility is 5.02 kilometers long. It is a bionic fishway combining a natural tributary watercourse and a long-distance tunnel, allowing fish to migrate upstream. It is Asia’s longest fish passage facility integrating an artificial tunnel and a natural river. The inlet of the fishway is situated on the left bank of Xinzhagou, a branch of the Dadu River, about four kilometers from the estuary of Xinzhagou. Its outlet is located on the right bank of Jinchuan Reservoir, about 4.6 kilometers away from the axis of the dam. The tunnel is about a kilometer long. The altitude of its bottom is gradually elevated from 2,245.55 meters to 2,251 meters, with an altitude difference of 5.45 meters and a composite gradient of 0.541%.

Jinchuan Hydropower Station of Dadu River Company has always been committed to protecting aquatic biological resources of the Dadu River and maintaining ecological balance in the river basin. In 2019, it started the work to research key technologies related to bionic fishway. Through actively protecting the original living environment of aquatic species unique to the Dadu River and constantly innovating fishway design ideas, it has effectively guaranteed the diversity, stability and sustainability of the local ecosystem.