Methodology for predicting the residual service life of water conveyance structures based on the analysis of crack watertightness and field surveys

Abstract This paper presents a methodology for predicting the residual service life of water conveyance struc-tures in land reclamation systems, developed on the basis of a comprehensive analysis of crack water-tightness in concrete linings and the results of field surveys. The study was conducted at facilities of three irrigation systems in the Lower Volga region: "Generalovskaya", "0-71", and "Pallasovskaya", characterized by high water mineralization and varying degrees of technical deterioration. Based on experimental studies using the AGAMA-2RM device, empirical relationships between air permeability resistance and crack width, as well as watertightness grade, were obtained: m_ср = 13,42e^{(-0,328·δтр)} (R² = 0,987) и W = 11,2·e^{(-0,295·δтр)} (R² = 0.909). It was established that the colmatation process under conditions of mineralized waters in the region increases resistance to air penetration by 23-44 % over 180 days; however, it does not en-sure compliance with standard watertightness requirements. Taking into account sulfate attack and cyclic freeze-thaw effects, degradation rate coefficients were determined for each system. An algo-rithm for predicting residual service life was developed, taking into account the kinetics of deteriora-tion of operational characteristics, along with a formula for calculating the time to the limit state. The accuracy of the predictions was confirmed by field monitoring of pilot facilities, with deviations not exceeding 10-15 %. The practical significance of the study lies in the possibility of applying the devel-oped methodology to justify the timing of repair measures and to transition to a system of planned preventive maintenance. The results make it possible to optimize operating costs and improve opera-tional safety. The implementation of the research results is consistent with the objectives of Decree of the President of the Russian Federation No. 474 aimed at improving the efficiency of water resource use and ensuring the reliability of land reclamation infrastructure up to 2030.

Keywords. Water conveyance structures; residual service life prediction; crack watertightness; field surveys; technical condition monitoring; land reclamation systems; concrete linings.

Funding. The study was carried out within the framework of the state assignment No. 125020401361-1.

For citation. Kovalenko I. A. Methodology for predicting the residual service life of water conveyance structures based on the analysis of crack watertightness and field surveys // Scientific Agronomy Journal. 2026; 2(133): 36-44. DOI: 10.34736/FNC.2026.133.2.004.36-44.

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