Method for environmental protection of fish from going into water discharge facilities

Spillway structures of hydroelectric power plants, dams, and other large hydroelectric facilities are characterized by high volumes of discharged water. Moreover, the discharge can also go in a volley way - when a large volume of water mass is passed in a short period. At the same time, in a large area in front of the spillway, a powerful current of flowing water arises, which draws in fish and juveniles. Traditional types of fish protection are of little use here, due to the complexity of the conditions. In this regard, we have begun developing a concept for active ecological protection of fish from getting into the spillways of hydroelectric power stations and dams. Its essence lies in the zoned non-physical fencing of the area of the water area in front of the spillway. The transformation of this area into a non-residential zone for fish. To implement this, the principles of active safe displacement of fish and juveniles outside the non-residential zone were formulated. A site dangerous for fish is removed from the ecology of their habitat. This ensures their protection from falling into the spillway. Experiments to test this method of protecting fish and juveniles showed the following. Active acoustic frightening of fish and juveniles makes it possible to effectively displace them from the danger zone. This protects the fish from drifting into the spillways of large waterworks.