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Coastal erosion in East Anglia is occurring at the rate of over 2 metres per year in some places and is a constant problem due to natural causes and human activities.

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Introduction

Introduction Coastal erosion in East Anglia is occurring at the rate of over 2 metres per year in some places and is a constant problem due to natural causes and human activities. Until recently, protection was done gradually and completed on a local scale. Recent studies have highlighted the need for a more comprehensive approach on a regional scale. Many different strategies have been suggested eg. Wave walkers, rip-rap boulders, sea walls, with re-surfacing and drainage. Erosion There are four main types of erosion. * Corrasion (abrasion) is caused by large waves hurling beach material against a cliff. * Attrition is when waves cause rocks and boulders on the beach to bump into each other and to break up into small particles. * Corrosion (solution) is when salts and other acids in seawater slowly dissolve a cliff. * Hydraulic pressure is the force of waves compressing air in cracks in a cliff. These four types of erosion are eating away the coast of East Anglia and there are only two things the local councils can do. They can let nature take its course or they can put sea defences in to protect the coast. If these precautions are not taken there is a large risk of flooding. ...read more.

Middle

Wave walkers cost �5,000,000 and only last 25 years. They have an ugly modern look. Rip-rap boulders cost �100,000 and last a very long time. Each boulder ways about half a tone and they're not a nice site for the coast. The straight sea wall is plain and erodes very slowly, so it doesn't need to be replaced frequently. The sea wall with a curve at the top is used so large waves are deflected back to the sea. These are also long lasting. Standard wooden groynes cost between �25,000-�40,000 depending on how long they are. They need to be replaced frequently. Fish-tail groynes cost �1,000,000 each but this is because they protect the coast better than the standard one's and last much longer. In the future the local councils of East Anglia hope to have defences like these protecting our coast. Global warming Since global warming is melting the ice caps the sea level of Great Britain has risen 15 cm since the turn of the century, largely in response to warmer surface temperatures. It is predicted that by 2030 the sea level will rise by 40cm. Such a rise would cause major changes to the coastline of the U.K. A rapid rise in such a short time could wash away our beaches and by the twenty second century places like the ...read more.

Conclusion

Each of these sea defences has its own use and the councils have a large amount of these spread along the coast. Editorial I think the coast of East Anglia should be protected. I also think that the local councils could do more to protect the coast. To start with they could protect coast not only where the towns and villages are, but could raise money so they can protect farmers land and people that live by the sea, because its not fair that people that live in town have protected homes where as people that don't have to worry how much longer their land will last. Even if the council put rip-raps down, it might cost a lot of money but it would still slow down erosion a lot. If something isn't done these people who can't sell their homes will have to wait until they have no home, then what will they do. Although undensely populated areas are not protected, the populated areas are protected well, but they still need more. Places like Clacton and Walton still need more protection or else things like marine erosion will get worse and global warming will over come the sea defences and inland places like the Themes basin and the Norfolk broads will be flooded. ...read more.

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