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Long Profiles and Valley Cross Sections |
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Starter |
 | Activities |
The long profile of a river shows a steep gradient at the source, gradually becoming lower and less steep until the gradient is almost nil near to sea level. |
Rollover Image > Upper Course > River Long Profile |
Diagram to show how the cross section of a river valley changes with distance from the source. |
| Case Study: The Afon Glaslyn, Wales, United Kingdom. |
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 Take a trip down the Afon Glaslyn as a Google Earth File. |
| Task |
Use Google Image Search to find images of each of the locations marked on the case study long profile diagram above.
Paste the images into a programme such as Microsoft PowerPoint to produce a description of how the gradient and valley cross section changes between Lyn Llydaw and the sea. Give reasons for all the changes that you can see in the images. |
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 | Review |
| Share your presentation with your class and discuss how and why the gradient and cross section of the river vally changes between it's source and the sea. |
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