How does the nature and flow of rivers depend on the relief?

The terrain directly affects the speed and nature of the flow of rivers. If a river flows on plains, where the angle of inclination between its source and mouth is minimal, then it will move slowly, the channel will be wide, and the current will be smooth. There will be few twists and turns on the river. But near mountain rivers, due to the large angle of the slopes, the current is fast and winding, the channel often breaks off. These rivers in many places form rapids and waterfalls, and their channel, for the most part, is narrow and sandwiched between the banks.