Abstract
In recent years, in the Russian cities there has been a decrease about 15-30% the total volume of water consumed and the specific indicator of water consumption per resident. However, this phenomenon is not taken into account in the SP 31.13330.2012, therefore the values of specific water consumption do not correspond to the modern level of sanitary equipment of the buildings and water consumption, which can not be the same for all cities and towns in Russia. Using the standard values of the design loads indicated in this code can lead to a significant increase in the cost of the project and operating costs. Their correction is necessary taking into account the assessment and forecast of the actual values of specific water consumption. This requires appropriate research and updating of specific water consumption standards for the design and reconstruction water supply and sewerage systems. The article describes the parameter justification method for the designed water supply systems under uncertainty of the prospective values of specific water consumption. The technique is based on the fuzzy sets theory and decision-making methodology under uncertainty of the initial information. This technique allows you to make decisions based on the minimum values of investment risks.
Highlights
The operating experience water supply systems in populated areas of Russia performed under the 80s of the last century, made it possible to determine the actual water consumption per resident with varying degrees of improvement in residential areas and in different climatic zones [1]
Analysis and processing of these materials provided an opportunity to develop averaged specific water consumption standards, which were the basis of SNiP 2.04.02-84 “Water supply
In recent years in Russia there has been a decrease in the total water consumption in cities 15-30% and, a decrease in the specific water consumption for household needs of the population [2]
Summary
The operating experience water supply systems in populated areas of Russia performed under the 80s of the last century, made it possible to determine the actual water consumption per resident with varying degrees of improvement in residential areas and in different climatic zones [1]. Analysis and processing of these materials provided an opportunity to develop averaged specific water consumption standards, which were the basis of SNiP 2.04.02-84 “Water supply. In recent years in Russia there has been a decrease in the total water consumption in cities 15-30% and, a decrease in the specific water consumption for household needs of the population [2]. Systems and facilities become underloaded, they have significant wear (60-80%) It is not known what water consumption will be in 15-30 years. The problem of forecasting and forming calculated specific water consumption values and, determining the parameters of water supply systems during the development of cities and settlements is related to optimization problems in the conditions of uncertainty of the initial information
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