1 / 7

Swanage Bay case study: Causes of coastal recession

Swanage Bay case study: Causes of coastal recession. Odd one out and why: spit, beach, bar Attrition, abrasion, biological Fetch, longshore drift, geology Backwash, erosion, beach Headland, bay, stack Chalk, clay, limestone.

andra
Download Presentation

Swanage Bay case study: Causes of coastal recession

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Swanage Bay case study: Causes of coastal recession Odd one out and why: spit, beach, bar Attrition, abrasion, biological Fetch, longshore drift, geology Backwash, erosion, beach Headland, bay, stack Chalk, clay, limestone

  2. http://www.bbc.co.uk/learningzone/clips/old-harry-rocks-dorset/3244.htmlhttp://www.bbc.co.uk/learningzone/clips/old-harry-rocks-dorset/3244.html Geology Fetch • Coastal recession….. humans Explain the factors which affect the rate of coastal recession (4) HINT: YOU MUST GO BEYOND JUST SAYING ‘FETCH’

  3. Swanage bay case study L2 Create a Venn diagram like this and complete the effects of coastal recession. Which ones overlap? Use FACTS!

  4. Coastal management at Swanage • What is hard and soft engineering? • Stick in the sheet with the information on add a positive and a negative • Use page 67 and 68 to add in the hard and soft engineering for Swanage • Annotate on your photo on the back where the different techniques are. • Complete the 6 mark question,

  5. Beach Replenishment Sometimes it is necessary to replace the sand and shingle that has been lost by the action of the sea. Lorries are used to transport material dredged up from the sea bed to the beach. + - Rip Rap These big boulders are usually placed at the bottom of a cliff. As the waves hit the boulders, their energy is lost so their erosive power is reduced. They are expensive. + - Gabions Metal cages filled with rocks. They are stacked together to make a wall to protect the coast. They are much cheaper than other sea defenses but don’t last as long. + - Curved Sea Wall A wall with a rounded lip at the top. This breaks up the waves energy and reflects the waves back into the sea, stopping them going over the top. Expensive but last for a long time. + - Groynes Natural beaches are the best sea defence, but often they are washed away by longshore drift. Groynes are cheap fences made from large wooden posts. They trap the sand and stop the beach being washed away. (look at the beach height either side of the groyne!) + -

  6. Annotate on here the different management techniques Choose an area of coastline you have studied. Explain how this area of coastline is being managed. (6)

More Related