The article deals with the results of the field survey of hydrosystem Belorechenskiy. During the survey, the main failures were revealed: undercut of frontal toe of main apron at a depth of 1.1 m; water filtration at the site of undercut; undercut of the end of apron at a depth more than 8 m, the apron has no bearing on foundation ground; deformation of reinforced concrete plates of the end of apron (slump, corrosion of concrete, armature denudation, destruction of joints); corrosion of pile foundation, unsatisfactory state of left bank contiguity at the end of apron as a result of the total scour of foundation ground from under the reinforced concrete plates and the destruction of the plates; funnel of scour by the depth of 10.0 m at the contiguity of a tail-race canal at the end of apron. The formation of local scour in the downstream of hydrosystem Belorechenskiy impairs the contiguity of streams. Such conditions require either organization of backed pond downstream with the corresponding water level rise, or additional contiguity construction in the downstream which enables to prevent the destruction of existing apron of the spillway. In connection with the situation at hydrosystem Belorechenskiy in the first place, it is necessary to repair formed destructions. To avoid adverse hydraulic regime after the construction, the end part of construction should be changed. It can provide the most even velocity distribution in live stream section.
Keywords: local scour of bottom, downstream of hydrosystem, flow, destruction, river Belaya.
