Please tell us briefly about the Danube River

The Danube River is the second longest river in Europe after the Volga River. It originates in southwest Germany, flows from west to east, flows through Austria, Slovakia, Hungary, Croatia, Serbia, Bulgaria, Romania, Moldova, Ukraine, and finally empties into the Black Sea.

The Danube River flows through 9 countries, making it the river with the largest number of trunk streams in the world. The tributaries extend to six countries, including Switzerland, Poland, Italy, Bosnia-Herzegovina, the Czech Republic, and Slovenia, and finally flow into the Black Sea at Sulina in eastern Romania. The total length is 2,850 kilometers and the drainage area is 817,000 square kilometers. The annual average of the estuary is The flow rate is 6430 cubic meters/second, and the average runoff volume for many years is 203 billion cubic meters.