In accordance with the Resolution of the Russian Federation Government N 782 “Concerning the Development of Water Supply and Wastewater Disposal Systems”, the development of surface run-off disposal systems comprising the electronic model, is a topical issue for the design and operation of wastewater disposal systems for the Russian settlements. In this context, the software used must provide making the hydraulic calculations for the gravity-flow systems of storm-water drainage networks. [1]. The analysis of Russian software [2-4] revealed the impossibility to develop electronic models and to make hydraulic calculations for the gravity-flow networks of storm-water drainage systems. In this connection, the possibilities offered by the foreign software products, which electronic models make it possible to carry out the required hydraulic calculations and to design surface run-off disposal systems, were studied [5,6]. This article contains the analysis of the European document BS EN 752:2008 [7] with regard to determining the flow of surface (storm-water) run-off, as well as the calculations made by the authors, which reveal that foreign software products are not applicable in Russia. Nevertheless, for the development of the electronic model for the hydraulic calculation of a storm-water drainage system, some mathematical relationship was found that most adequately characterizes the type of surface run-off hydrograph, most typically occurring on the territory of the Russian Federation in cases of atmospheric precipitation fallout. This relationship comprises the application of the RTK hydrograph method.

Introduction. The analysis of the Russian normative and methodological documents, as well as research articles, has identified gaps in the development and practical implementation of hydraulic electronic models of existing water supply systems. The user guide of the software products, used to design these models, merely demonstrates the capabilities of software modules and misses the outcome of their application in certain cases. Decree No. 782 issued by the RF Government on September 5, 2013, being the document that regulates the development of electronic models of water supply systems, lists the requirements applied to software. The document, titled Construction regulations SP 31.13330.2012, has the requirements applicable to the hydraulic analysis of water supply system designs. This suggests that the Russian regulatory environment has no document that contains the basic requirements governing the development and detailing of hydraulic electronic models of water supply systems. This is an essential problem of urban utility networks, since the hydraulic electronic model is the basis for any further actions in strict accordance with which a development plan of a centralized urban water supply system is designed. Materials and methods. The article has a scientific review of the problem of design of electronic hydraulic models of centralized water supply systems and basic principles and approaches to electronic model generation. Results. The co-authors provide a detailed description of a methodology used to develop a model of urban water supply systems as well as the requirements set by foreign standards. Conclusions. Model development and calibration is structured in the article. This information is needed to adjust the characteristics of the designed model to a water supply system in operation.