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UDC 628.218

Chupin R. V., Primin Oleg

Substantiation of the wastewater disposal system parameters
in the context of projected water consumption and wastewater discharge uncertainty

Summary

Lately in Russian cities the reduction of the total and per capita water consumption has been observed. However the active «Water supply. Outdoor networks and structures. Revised edition of SNiP 2.04.02-84» SP 31.13330.2012 design and construction specifications do not take into account this fact and, consequently, the presented values of the specific water consumption do not keep to the current level of plumbing and water consumption patterns that cannot be uniform for all the cities and communities in Russia. The use of regulatory values of rated loadings set in these design and construction specifications in designing water and wastewater systems can result in project cost increase and significant operation expenses. Accordingly they have to be corrected with account of the assessment and prediction of the actual specific consumption values in separate cities and communities. This in return requires relevant studies and update of the specific water consumption regulatory values for designing and updating the developing water supply and wastewater disposal systems. The method of substantiating the parameters of the sewers under design in the context of projected water consumption and wastewater discharge uncertainty is described. The method based on the fuzzy sets theory and methodology of decision making in the context of the baseline information uncertainty provides for handling alternative values of water consumption and making decisions on the ground of the minimum investment risks.

Key words

specific water consumption , optimal parameters of a sewer , fuzzy sets model , assessment , prediction , minimization of risks in choosing the parameters of the wastewater disposal system

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