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"Describe and explain the differences in the coastline North and South of the Tower Breakwater at Walton on the Naze"

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"Describe and explain the differences in the coastline North and South of the Tower Breakwater at Walton on the Naze" Jennifer Sutherland Candidate number: School: Hertfordshire and Essex High School Contents Introduction The purpose of this project is to "Describe and explain the differences in the coastline North and South of the Tower Breakwater at Walton on the Naze". In order to this I must first ask myself some questions in order to plan what I must find out and find a method or information I would need to collect to enable me to answer these questions; Waves - Is there a difference in the wave types in the North and South beach? I could research waves by collecting wave heights and wave frequency data Longshore Drift - Is there any evidence that longshore drift occurs? To find this out, data that I could collect could be cork measurements, wave directions and groyne measurements. Coastal Management - What types of coastal management occur? Where and why have they been put there and have they been effective or not? I will make observations, sketches and take photos in order to answer this question. Human activities along the coast - Are there any residential areas? How have these influenced the coastal management technique? I would use observation as my data collected. Cliffs - Are there any cliffs along the coast? What do they look like - Steep? Gentle? Has slumping occurred? Data I would need to collect would be sketches, photographs, height calculations profile, processes operating and why? Beaches - What do they look like -wide? Narrow? What is the gradient of both North and South beach? Are there differences in the types of beach material? Are there wave cut platforms? Evidence to collect would be beach profiles, pebble samples, observations, processes operating and why? Information about Walton on the Naze Walton on the Naze is situated approximately 80km East of Bishops Stortford. ...read more.


Cliffs Aim: In order to find out the differences between the North and South beach we investigated the differences in the cliffs. Equipment: Clinometer, tape measure, sketch pad, pencil. Method: I started by drawing a sketch of the cliff and backed it up with a photograph to help me do a neat sketch when I returned. I then stood approximately 40m away from the cliff base. I could not get to the base of the cliff because slumping had occurred and so this measurement was just an estimate. This distance was called D. Then, using the Clinometer, I measured angle a� by standing 40m away and pointing the Clinometer up to the cliff edge. To calculate the height of the cliff I used the formula: (D x tan a�) + height. The Height is my height which is 1.68m Results: North beach (D x tan a�) + height = (40 x tan 24�) + 1.68 =19.48914741 =19.5m (1 decimal place) South Beach We could not conduct a cliff profile fro the South Beach because we could not see the top of the cliff. This was because there were beach huts and coastal protection features all down the cliff and blocking the view. Analysis: As I could not conduct a cliff profile for the South beach I cannot compare the two beaches. However, I can conclude that the South beach has more coastal protection features, so much so that I was unable to conduct a cliff profile as they were in the way. I can also see that on the North beach, slumping has occurred. Conclusion: Although the two height profiles cannot be compared I can still use observation to see that the cliff on the North side of the beach is less disturbed by man made features and the South cliff also has a gentler slope. This could be because the South beach is used more on the South beach and so they put the beach huts there. ...read more.


This was not the same on the South beach however. The long axis measurements show that at high water, the pebbles are generally larger in size which is as I would expect. The unexpected results of the North beach could be due to incorrect measuring or insufficient numbers of pebble data collected. By looking at the dispersion diagrams I can see how spread out all the data values for each long axis measurement are. When looking at the low water measurements I can see that the south beach measurements are much closer together. The sample difference is significant in that the median for the North beach low water is much higher at 6cm than the south beach low water at 2.4cm. This would indicate that the pebbles on the South beach are smaller in size than on the North beach. When looking at the High water results I can see that there is not particularly a significant difference between samples and the medians are exactly the same, 4cm. However, the south beach does have a higher upper quartile of 4.9cm. Evaluation When working out the Calliuex roundness index, I found that I kept getting numbers over 1000 for the answer. This is not possible because 1000 is a perfectly round pebble. By getting an answer over 1000 it meant that the radius of the pebble we had measured was longer than the length. This is incorrect because the radius is always shorter than the length. It was because of this that I deleted all the incorrect samples from my list of pebbles and I had to replace them with another sample to make up 50 pebbles. If I was to do another pebbles survey I would make sure my measurements were very accurate and that I didn't record the length of the radius to be longer than the length. I could also take a larger sample so that if I did make an error I could replace it with the extra sample I has collected. ...read more.

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