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A case study on coastal erosion and how people have tried to stop this happening.

Extracts from this document...

Introduction

Contents page 1. Contents page 2. Introduction 3. Map of area chosen 4. Geographical theory 5. Aims 6. Swash and Backwash 7. Swash and Backwash results 8. Swash and Backwash graphs 9. Swash and Backwash graphs 10. Area of beach material 11. Results of beach area 12. Beach area diagrams for Barton on Sea 13. Beach area diagrams for Highcliffe 14. Phase difference 15. Phase difference results 16. Overall evaluation Introduction Im going to do a case study on coastal erosion and how people have tried to stop this happening. I have decided to do it on the Christchurch bay in Dorset and focusing on two beaches in particular Barton on Sea and Highcliffe. I have chosen these two beaches because they are next door to each other but one has coastal protection as in the form of Groynes and beach nourishment the other has nothing they also share the same soil type and the original type of beach material. There is only one major difference apart from the protection they are in two different counties one in Dorset the other in Hampshire. Here is a map of the area I will be focusing on: Highcliff Barton on sea 1 2 3 1 2 3 The area highlighted is the area I will be focusing on. ...read more.

Middle

Evaluation If we had done the results at high tide I would have hoped the results to show that Highcliffe had a weaker backwash than Barton, therefore making Barton have a higher phase difference than Highcliffe. So if I want to have more reliable results or just to make certain that my results are completely wrong I would have to do this test again at high tide. Swash and Backwash results These results are an average of ten that I did at each point of the beaches. Barton 1 Swash Backwash 19.3 9.625 Barton 2 Swash Backwash 22.7 17.8 Barton 3 Swash Backwash 29.5 24 Highcliffe 1 Swash Backwash 30.7 17.7 Highcliffe 2 Swash Backwash 37.7 14.6 Highcliffe 3 Swash Backwash 23.3 18.4 Swash and Backwash graphs Barton 1 Barton2 Barton 3 Highcliffe 1 Highcliffe 2 Highcliffe 3 Area of the beach We did this test by using clinometer. A Clinometer works by measuring the angles on a beach from these results and the length of the beach we drew up scaled sketches of the beaches. This is what a Clinometer looks like: The results are shown on page 8 as a form of data then I converted in to results on pages 9 and 10 as diagrams or sketches. ...read more.

Conclusion

The only result that doesn't get affected by this was the beach area. The weather could have been a variable because when we did the experiment it was fine weather but if we had done it in stormy or rougher then there would have been stronger waves therefore getting different results. The accuracy of my data collection would have been quite a major limitation because if I weren't precise with the collection I would come to wrong conclusions about the different aims. The most useful method to collect data was when I measured the area of the beach material this was the most useful because the length of the beach or the amount of material doesn't change with the tide. I would extend my study by taking these tests again at a different time of year and maybe with different weather conditions. I think there is a big link in my conclusions and the phase difference and the swash and backwash because we did the experiment at the wrong time of the day when the tide was going out not in. Rebecca hall 11M1 Does coastal protection work? Mr Goldsmith Page 1 ...read more.

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