Due to environmental concerns and increased awareness over the past few decades, the new legislation has increased demands for efficient and sustainable drinking water use. Public water utilities are constantly looking for new ways to improve the condition and operation of existing water supply systems. According to the legislation, in Slovenia water utilities are obliged to maintain their infrastructure in such condition that they can satisfy the needs for drinking water. The thesis describes a methodology, which aims to assess the technical condition of the pipes in water distribution system. With this methodology, it is possible to determine the individual sections of pipe networks, that are most needed for rehabilitation, so-called critical sections.
In the first part of this thesis, we briefly presented the legislation from the field of drinking water supply, the structure of water supply systems, pipe deterioration process, causes and consequences of a pipe failure, factors that contribute to pipe deterioration. The second part describes the used methodology, which was designed and built based on literature reviewed, own expertise and software knowledge. The third part shows the use of the methodology in the selected area. At the end result and their verification are presented and an example of a detailed analysis of the pipe section is given for elaborating pipe rehabilitation strategies of the critical pipe sections.