Purpose: consideration of current problems associated with the safety of low-pressure waterworks for reclamation purposes, using the example of a hydraulic structure of a seasonal regulation reservoir of the Yenisei basin district of the agro-industrial complex on the Soy river.
Materials and methods: a step-by-step assessment of the security level of reclamation hydraulic structures of a complex waterworks was carried out, starting from ranking their technical state, accident scenario assessment, risk level, breakthrough wave parameters and the flood zone after the formation of a passage on the earth dam, ending with determining the probable damage and the scale of the emergency in the event of a hydrodynamic accident on it.
Results. The analysis of data from a survey of the technical condition of the hydraulic structure of the hydroreclamation complex and the corresponding calculations showed that the safety level of the hydraulic structures is unsatisfactory for this waterworks on the Soy river. The average annual probability of emergency situations is 5.2·10–2. An emergency situation in the downstream of the dam due to a hydrodynamic accident, if the most likely scenario is realized, will have a regional scale both in terms of the amount of damage caused and on a territorial basis.
Conclusions: based on the analysis of safety criteria in relation to low-pressure hydraulic structures (assessment of the parameters of the dam crest, spillway capacity, seepage strength of the ground of the dam body and base and stability criteria for individual elements of earth and concrete hydraulic structures), the need to perform sufficiently accurate calculations for low-pressure hydraulic structures of IV hazard class is shown, allowing to give recommendations on measures to reduce probable loss from a hypothetical or real accident at the hydraulic structures of reclamation systems.
safety assessment, reclamation waterworks, damage, defects in hydraulic structures, technical rehabilitation
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