The issues of ensuring the safety and operational reliability of the functioning of irrigation and drainage systems with a long service life are considered. It has been established that the service life of irrigation and drainage systems in the south of Russia is about 40-50 years, the average wear is 72%. In the Krasnodar territory the rate of wear of reservoirs, ponds and canals is about 80-100% which indicates to a signifi cant siltation and loss of throughput capacity. Depreciation of dams and dikes is 35-40%. The main damages of the HTS are erosion of the upper slope, malfunction of the spillway and silting of the reservoir bowl (pond) which leads to increased filtration through the dam body, an increase in the level of the depression curve and complication of the passage of fl ood water. Changes in the rules for the operation of hydraulic structures, in particular, a decrease in the normal retaining level in comparison with the design level is not a rare occurrence. At the same time, the HTS operation in the sparing mode can be considered a temporary measure used until repair or reconstruction is carried out. The operational efficiency of hydraulic structures with a high degree of wear at the level of ultimate loads and impacts below the design values is noticeably getting reduced. The use of constant monitoring, as well as forecasting the reliability of hydraulic structures, can reduce the severity of the problem. Safe and effi cient operation of hydraulic structures with a high degree of wear during the period preceding repair or reconstruction can be ensured by introducing a system for automated monitoring of hydraulic structures in combination with a decision support system (DSS).
Current issue of hydrotechnical structures calculation
