Abstract
The subject of the paper is the reliability and environmental safety of water supply and sewer pipelines of public water supply and sanitation systems. It is shown that the steadily increasing rate of deterioration of water supply and sewer networks in cities and communities in Russia, the limitations of material resources for their rehabilitation have aggravated the problem of ensuring their reliability in recent years. The paper presents the reasons for the low reliability of pipelines. It is shown that the determining criterion for the environmental safety of pipelines is reliability - one of the main quality indicators of any structure (system). The research method was a statistical estimation of the reliability indicators of water supply and sewer pipelines, and an analysis of the factors that shape their change. The paper results in suggestions for a planning strategy of the rehabilitation and renovation of pipelines and reduction of all types of water losses.
Highlights
Pipeline systems are an integral part of the infrastructure of modern cities
It is obvious that the pipelines of public water supply and sewer networks in most Russian cities are potential sources of environmental hazard for the environment and humans; and ensuring their reliability is the main requirement applied to these elements of the water supply system
The results of international and long-term MSUCE and MosvodokanalNIIproject JSC studies on the operation of public water supply and sewer networks have shown that the characteristic criterion of the environmental safety of pipelines is the reliability - one of the basic quality indicators of any structure that consists in the ability to perform specified functions within a required period of time while maintaining the serviceability [6,7,8]
Summary
Pipeline systems are an integral part of the infrastructure of modern cities. At present the water supply networks of cities and communities in Russia supply annually about 25.5 billion m3 of water including 17.2 billion m3/year for the population and for public living needs. The reasons for the low reliability of pipelines in Russian cities, including the city of Moscow, are well known and did not arise overnight [5] They are as follows: long service life of pipelines, low corrosion resistance of a large number of pipelines, non-observance of the technology for laying and installing pipelines during the period of large-scale housing construction; lack of necessary measures of pipeline protection from the aggressive impact of the outside and interior environment; bursting pressures, impact of water surges, drop in long-term strength; nonconformity of pipe quality with the requirements of the state standards. It is obvious that the pipelines of public water supply and sewer networks in most Russian cities are potential sources of environmental hazard for the environment and humans; and ensuring their reliability is the main requirement applied to these elements of the water supply system
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