Abstract
The article provides a description of the complex pneumatic fish protection structure (FCS) of the pumping station No. 1 of the Karmanovskaya GRES. Estimated design flow rate of NS No. 1 of water intake is 44 m3/s. The RGU includes an impenetrable screen in the form of a zapan, covering the surface two-meter layer of the water intake flow and a pneumatic (water-air) curtain that provides protection for fish fry of various sizes living in the thickness, surface and bottom layers of the reservoir.
 Ichthyological studies conducted by the Tatar branch of the Federal State Budgetary Scientific Institution "VNIRO" showed that the complex pneumatic fish protection structure protects juvenile fish living in the reservoir with an average efficiency of 86.51%, which exceeds the regulatory requirements of 70% of the current SP 101.13330.2012 (updated edition of SNiP 2.06.07 -87 "Retaining walls, shipping locks, fish passage and fish protection structures" (as amended No. 1).
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