The source of the River Severn is in moorland in mid-Wales. The area receives excessive rainfall due to depressions from the Atlantic. The Severn swiftly grows and forms a V-shaped valley. The river transports a large load, which allows rapid erosion to take place. Waterfalls and gorges have been formed in the upper course. As the gradient decreases, meanders and oxbow lakes can be found. As the river nears the lower course, flooding is a threat.
Can be used to discuss how the river's profile changes from its source in the upper course to the lower course.