Description of the lower course of the river Severn as it widens and nears the sea, becoming a tidal river. The effect of tides on rivers is noted.

First broadcast:
6 January 1997

After watching the clips 'Middle course of the river Severn' and 'Meanders combining', this clip could be used as an introduction to estuaries and the final stage in a river's course. Follow up using GIS for satellite images/ maps of the Severn estuary to identify sandbanks and mudflats caused by deposition and flocculation. This could be used to discuss the land use in estuaries using satellite images and OS maps of the Severn estuary. This could be part of a unit of work on river processes and landforms.