This project involved a pre-development assessment for the water supply of newly planned residential development sites in the Kosanin Dol area of Sofia.

Rather than designing a standalone connection for the individual plots, the study evaluated the capacity and long-term performance of the entire local water distribution system. Existing infrastructure, previous engineering studies, future urban development, and opportunities for network expansion were assessed to develop a sustainable infrastructure strategy.

Due to the site’s significant elevation differences, the water supply system was divided into high-, medium-, and low-pressure zones. A pressure management strategy, including the future installation of pressure reducing valves, was developed to ensure reliable operation and consistent service levels across the network.

The proposed solution was verified through hydraulic modelling using EPANET. The model evaluated both normal operating conditions and fire-flow scenarios, confirming the feasibility of the proposed network upgrades.

The study resulted in a phased development strategy for the water supply system, including a new looped distribution network, targeted infrastructure upgrades, and reliable long-term water supply for future residential development.

The project demonstrates a strategic approach to utility infrastructure planning by combining hydraulic modelling, network optimisation, and long-term infrastructure planning to support sustainable urban growth.