Send the link below via email or IMCopy
Present to your audienceStart remote presentation
- Invited audience members will follow you as you navigate and present
- People invited to a presentation do not need a Prezi account
- This link expires 10 minutes after you close the presentation
- A maximum of 30 users can follow your presentation
- Learn more about this feature in our knowledge base article
Why is Happisburgh falling into the sea?
What coastal processes have caused the destruction of the coast? What have people done to reduce the damage? What have been the impacts on the local people of the damage? What do I think is the future for Happisburgh?
Transcript of Why is Happisburgh falling into the sea?
WHY DID HAPPISBURGH FALL INTO THE SEA? What coastal processes have caused the destruction of the sea? Erosion? Longshore Drift? In fact, these answers are all correct! Over the years erosion can have a big affect on small towns and villages on the coastline. But England will never be tiny because of erosion. This is because of something called deposition. I will tell you about longshore drift, but FIRST, let me tell you about deposition. Deposition is when bits of sand and rock are carried off one beach (when they fall off cliffs due to erosion) and deposited somewhere else. This is how beaches form. Where is Happisburgh? Happisburgh is a village in the Norfolk county. It is in the east of England. It has an area of 10.78 km squared. But this is declining due to various reasons. Erosion being one of them. Weathering? I told you I would tell you about longshore drift! Longshore drift is when the wind blows waves onto the beach in the direction the wind is travelling. This is called swash. Backwash is when the waves go back into the sea, ALWAYS perpendicular to the beach. Types of erosion: 1) Abrasion 2) Attrition Abrasion - Waves fling sand and pebbles against the rock. These wear it away like sandpaper. Attrition - Chunks of rock get knocked together and worn into smaller and smaller bits. They end up as shingle (pebbles) and sand. Here is a type of weathering, another reason rocks break down. It is called Hydraulic Action. This is when waves force water into cracks in rocks, which helps break them down. Solution - Waves dissolve soluble material from the rock. I know what you're thinking! But what have people done to reduce the damage, surely they would have done something? Here were some of their ideas: 1) Wooden Barriers, or Revetments 2) Groynes These wooden barriers, or revetments, were meant to slow down erosion, by making the waves break early. But they were destroyed in a past storm. The main problem is that the cliffs are soft - sand on top and clay below. Rain soaks into the cliffs and helps to weaken them. This is one form of weathering. The more rain they hold, the weaker they get. The groynes are supposed to stop longshore drift, but they too were destroyed in a past storm. What have been the impacts of the damage on the local people, I hear you ask? Well, seeing as 1 house is destroyed every 1 year, you can tell that erosion isn't the quickest thing in the world, and so people ARE clever enough to leave their homes and not just stay there and die! People lose their homes, and maybe even some of their possessions. Some families might have had memories from their house and it would be very upsetting to leave. But the impacts are that people will have to leave Happisburgh, and sometime, Happisburgh might eventually disappear. But because of deposition, England will not just shrink until there is nothing left. The eroded shingle (pebbles) and sand will be deposited somewhere else, which is how beaches are formed. Unfortunately, there probably will not be much of a future for Happisburgh. It is most probably going to all be eroded and deposited somewhere else. Therefore, the people living there are all going to have to move homes, and also claim home insurance! What do YOU think the future is for Happisburgh? Conclusion: In Conclusion, I would say that the waves have been too strong for Happisburgh, and their attempted defences have failed, which unfortunately brings about the bad news of a likely no future for Happisburgh, awith homes being destroyed annually.Full transcript