**6. Acknowledgements**

This research was supported by the Baross Gábor Program (Grant No. REG\_DD\_KFI\_09/PTE\_TM09), the Hungarian Science Fundation (OTKA, Grant No. T 68903) and the Bolyai János Scholarship. The authors are grateful for the data and support provided by the Hungarian Meteorological Service, the South-Transdanubian Water Management Directorate (DDKÖVIZIG), the VITUKI Rt. and the Mecsekérc Zrt. The authors are especially indebted to Ákos Horváth, Gábor Horváth, András Varannai, Gergely Resitcky and Roland Vendégh for their contribution to the present work.
