engleski

The rainfall characteristics of the Osijek area

The urban drainage analysis is a current problem in Osijek, the capital of Slavonia and Baranja in Croatia. The basic combined sewage system of the city of Osijek, town with more than 100 000 inhabitants and significant industry, must be developed, reconstructed and completed. For the purpose of sewage system improvement functioning, the modelling is being prepared for the present, but also for the future state with completed primary sewage system and wastewater treatment plant. The rainfall is one of the basic input data in the modelling. Because of this, the rainfall monitoring was established at first. It consists of five ombrographs in the different part of Osijek's area. This paper shows the initial research of registrated rainfall events with the purpose to observe the space and time rainfall distribution on the city area. In frames of present financial possibilities a relatively thick network was established with automatic instruments which have a 5 minute interval of data reading. The analyses were pointed to the observation of simultaneous rainfalls with determined duration by the maximum values appearences on a location and to the internal structure of the characteristic rainfall episodes.The great differences in rainfall events across the city were observed which should be taken into consideration in the further engineering praxis.

rainfall; rainfall episodes; internal structure

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