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Walton-on-the-Naze - Coastal erosion

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Introduction

GCSE Geography Coursework - Walton-on-the-Naze Coastal erosion presents a problem along the coastlines of Britain. One of the many areas affected by this is Walton-on-the-Naze, situated in the Southeast coast of England, about sixty-five miles from London. Walton-on-the-Naze is a dated tourist resort with a pier, which has an end shut off due to unsafe structure. There is an area of cliffs further up coast, which are suffering from erosion and cliff collapse. The government has erected a number of different sea defence mechanisms including groynes, rip rap and wooden revetments. These are erected to protect the cliffs from substantial erosion and the eventual disappearance of Walton-on-the-Naze. Sea defences are very expensive to set up but could have dramatic effects on the future of Walton-on-the-Naze. There are several groups of people who believe that it is worth the money, these include local residents, conversationalists and local business owners. Residents want to protect Walton because none of them wish to lose their homes to the sea, they believe that whatever can be done to conserve their homes should be done however high the cost. ...read more.

Middle

Erosion by the sea is evident at the toe of the slump beneath the tower embayment. The power of the sea on concrete is shown here. It is obvious why it can completely destruct sand and clay. The sea power here has moved the concrete blocks. At one stage, the waves had cut a sharp half-meter cliff into the deposit, but now the whole beach has been reduced. Grasses have been eroded from their new deposits leaving a fine mat of root fibres to blow in the wind. Solutions have been given to prevent cliff erosion; Sea Walls - A sea wall reflects the energy of a wave, as it is built of concrete. The reflected energy creates erosion in front of the wall; so steel pilings are used to protect the foundations. It is approximately �7000 a meter. Revetments - There are two types of revetment, timber and block filled. Timber types are sloped with timber and have spaces to allow the sea to pass through and over. ...read more.

Conclusion

It will last a long time because concrete is strong but being an unnatural material, it will pollute the landscape. An alternative idea is beach rebuilding. This only costs �3 per cubic meter but is very easily carried by long shore drift. The sand carried by the water will only build up further along the coast. This requires regular replacement so I do not think it would be very effective in the long term. Offshore breakwater protects shore from all waves by breaking them up. This could be effective but would prove inconvenient for boats. Gabions are not very effective because they are easily filled up with grass and sand. Groynes and revetments are also likely to fill up with beach material as a result of long shore drift. This is a process in which sand is carried along the shore - line by waves and deposited at a later stage. You can tell which way long shore drift is by noting which side of the beach has a build up of more sand. ...read more.

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