The High Rhine starts at Stein am Rhein in Switzerland. The natural rates of flow are a particular feature of this part of the Rhine.
A little further on, at Schaffhausen, you can find one of the biggest waterfalls in Europe, the Rhine Falls.
The river Aare enters the Rhine at the Swiss town of Koblenz. At this point the Aare is flowing at an average speed of 557 m³/s, and so is carrying much more water than the Rhine, which has an average speed of 439 m³/s. An Olympic swimming pool contains 2,500 m³ (two and a half million litres) of water. This means that the Aare moves more than a swimming pool of water every five seconds.
Rivers usually bear the name of the river that carries most water, but because the Rhine is longer than the Aare until the point at which they meet, the river is called the Rhine.