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The present study investigates water consumption patterns in 11 secondary and high school buildings in Sofia, Bulgaria, and evaluates the adequacy of the current regulatory requirements for this category of public buildings. Water consumption and pressure were monitored at one-minute intervals during two annual two-week measurement campaigns for each facility, resulting in a database covering 368 days. Water losses were identified through minimum night flow analysis and excluded from the assessment of effective wa...

At present moment, Bulgarian regulatory documents lack rainfall hyetographs that can be used in computer models of sewer networks. In the conditions of climate change and the occurrence of extreme precipitation phenomena, this leads to difficulties in the application of sewer network modeling in solving engineering problems. It is not possible to perform a normatively defined determination of hydraulically overloaded sections of the sewer network, as well as to determine the expected frequency of flooding and floo...