Simplified Methodology for Assessing the Optimality of a Yard Sewerage Scheme

The article addresses the problem of optimal routing of yard domestic sewage networks in the development of new areas or the reconstruction of existing residential neighborhoods. Despite the long-standing existence of centralized sewage systems, current state building regulations (DBN) lack clear criteria and methodologies for assessing the efficiency of pipeline layouts at the local (yard network) level. This complicates the adoption of economically feasible design solutions and may lead to significant cost overruns on a national scale. The study analyses the shortcomings of the regulatory framework, as well as current approaches to optimizing sewer networks, including methods of dynamic programming, mathematical modelling, and the use of computer applications. The use of a dimensionless efficiency indicator for routing, YSN, is proposed, which takes into account the network length, the average depth of pipes and manholes, the number of manholes, and the area of the block. Special attention is given to a practical tool — the “Canalisation” application, developed in collaboration with former employee of Institute of Hydromechanics Nataliia Stepova, for calculating the technological parameters of yard sewage networks. The proposed approach enables a rapid preliminary assessment of the efficiency of yard network routing, simplifying the decision-making process and reducing design and construction costs. The study aims to improve the methodology for designing yard sewage systems by considering economic and technical factors.