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.

This clip is from:
World Physical
First broadcast:
21 February 2008

Students could follow the course of a river and study how its features have evolved, and how it will change the landscape in the future. They could do this physically or on a map that shows contours, meanders and other features.