Hidrológiai Közlöny 1989 (69. évfolyam)

3. szám - Déri József: A Duna jeges árvizei évezredünkben

158 HIDROLÓGIAI KÖZLÖNY 1989. 69. ÉVFOLYAM. 3. SZÄM Hungarian reach of the Danube, while both climatic fluctuations and unfinished river training works played a decisive role in the genesis and frequency of devastating ice floods. The main feature of the climatic fluctuation, beginning in the last years of the XlXth century and lasting for several decades, was a rise in temperature of the winter periods. During the first half of the XX*b century, the favourable effect of river training on ice regime control was overstimated, because the effect of climatic fluctuation was not duly taken into account. On the basis of an analysis of the process of changes in ice jam generation, resulting in dike raptures during the last 150 years, it is shown that the center of gravity of aeras inundated by ice floods has shifted to the southern section of the Danube River. The paper then summarizes the river training guidelines by Pál Vásárhelyi and Jenő Kvassay with special regard to ice regime control. Keywords: ice flood, Danube River, inundated areas, climatic fluctuation, river training, ice regime control DÉRI JÖZSEF A szerző munkásságának összefoglalóját az 1988/5. szám 261. oldalán közöltük.