What are the important features of the Danube?

The Danube flood is caused by heavy rain or long-term continuous rainfall in summer and autumn, melting of mountain snow in spring and melting of ice and snow in winter. It has the following two characteristics: first, the occurrence of catastrophic floods in the whole basin is extremely rare, and most of them are limited to local river sections; Second, floods may occur all year round, only in different river sections.

The snowmelt flood in spring comes from the tributary on the right bank of the upper reaches of the Alps; Second, it comes from the downstream left bank tributary of Carpathian Mountain. In addition, the three tributaries of the middle and lower reaches (Delaware River, sava river River and Greater Morava River) will also have spring floods in the reach near Belgrade due to snowmelt floods in the upper mountain areas.

Summer floods and autumn floods often occur in the Austrian reach, the border reach between Slovakia and Hungary and the lower reaches of the middle reaches. The floods in these reaches generally come from tributaries on both sides of the river, and the upstream water also has different degrees of influence.