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We studied the reasons of the formation of local scours in the Cheboksary hydrosystem tailrace on the Volga river. To determine the parameters of the scour basin, we calculated the spatial conjugation of the races in MathCad application software environment. The morphological analysis of soft shells allowed us to establish characteristics of mobile baffles required for protection of the hydrosystem tailraces from scouring. For the formation of an induced vortex flow directed opposite to the channel flow, we propos...