Long profiles and valley cross sections

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.

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.

Using Google Earth for web with this lesson

Click on this link to open a tour from Llyn Llydaw to the sea.

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 an application such as Google Slides 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.