engleski

Osijek wastewater network – observations and rainfall characteristics

Osijek is the largest city in the eastern Croatian lowland region of Slavonia. Some specific stages have been observed in the development of its wastewater network. Over the past decade, a system of urban conglomerates has been established from a simple wastewater network. The basic concept and design elements of the wastewater network are based on characteristics of the local rainfall. Also, extreme rainfall events are particularly interesting for the system efficiency and management capabilities. Because of that, observations of rainfall events began at the end of the last century at five locations, with an automatic rain gauge. This paper presents rainfall measuring and certain problems in its implementation. The preliminary analysis of registered rainfall events indicates their characteristics. The analysis of the extreme rainfall events during the fifteen-year research season (1999-2013) reported in a form of one-minute rainfall events indicates a significant change in this century. Rain gauges recorded short-term rainfall events with amounts equal to the range of average monthly values. Finally, the paper points out the necessity of a more detailed analysis of rainfall events in the Osijek area because of urban flooding risks that could be mitigated by establishing a real time control system.

wastewater network, rainfall spatial distribution, extreme rainfall events, rainfall gauge, rainfall monitoring

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