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Climate change and the increasing frequency of extreme rainfall events impose additional stress on urban drainage infrastructure and particularly on wastewater pumping stations operating within combined sewer systems. This study investigates the operational performance of an existing wastewater pumping station located in northeastern Bulgaria and subjected to significant hydraulic loading caused by permanent external inflows and stormwater runoff. The assessment combines field observations, SCADA-derived operation...

In recent years the subject of reliability prediction of complex systems has become more significant because of increasing the criticality of the infrastructure. The present research refers to surveying the operation of pumping stations and problems encountered during the exploitation, as well as developing a reliability assessment methodology. The main causes of damages in pumping stations are analyzed according maintenance data from water supply and sewerage operators. Reliability assessment is based on the dete...