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Walton on the naze coursework

Extracts from this document...

Introduction

SAMUEL COLE 5C HOW EFFECTIVE ARE COASTAL MANAGEMENT TECHNIQUES AT WALTON ON THE NAZE? The aim of the coursework is to find out how effective coastal defences on the north and south beaches at Walton on The Naze, Essex. We have knowledge that the north beach is unprotected, whereas the south beach is protected by man made defences. The naze has been chosen, because it shows a coastline which is eroding very quickly and is also relatively close to our school. A comparison can be seen between the two sides i.e. The North beach appears to show cliffs that are eroding very rapidly, whereas the south beach erosion is less apparent. Two beaches differ significantly and therefore make a fine area to do the coursework. These questions will be asked to help reach a conclusion: --What evidence is there to show that erosion still takes place? --What evidence is there that long shore drift is taking place? --Do the coastal defences on the South Beach affect the North beach? --Is there a noticeable effect of longshore drift on the coastline? Location Of Walton On The Naze? SEQUENCE OF STUDY PRODUCE AIM AND INTRODUCTION FOR INVESTIGATION WRITE OUT THE METHOD COMBINE ALL GATHERED DATA (Input all data collected on trip into charts and graphs) CONDUCT WIDER BACKGROUND SEARCH (Receive secondary data) ANALYSE DATA (Assess the data assuring there are no irregularities) WRITE UP A CONCLUSION FOR EACH HYPOTHESIS A FINAL CONCLUSION ARE THE CLIFFS AT WALTON ON THE NAZE STILL ERODING? ...read more.

Middle

Red Crag on top of cliff London Clay rock. Beach is a wave cut platform and is predominantly made up of clay. Diagram showing slumping cliff on North Beach Protection comparison: North and South beach North Armour blocks are indeed one type of protection on the North side.They are relatively cheap but are environmentally unattractive. If they are resting on sand and shingle they can also be undermined by waves. There are no sea walls or groynes built on the north side. Minor plantation is seen on the cliff face. There are also apparent cracks in the wall. The cliff faces were indeed battered and bruised and there were signs of slumping. This apparent lack of protection, is a fundamental factor for the cause of the rate of which the North beach is eroding. Rip Rap South Recurved Sea Walls are expensive to build and may cost up to �1million per km. They are designed to stop erosion but his also means that there is less sediment to protect other stretches of coast. They reflect wave energy, and as a result of this, the waves scour base of sea walls undermining them so that they eventually collapse. Groynes stop longshore drift and keeps the beach in place. Basically the idea of a groyne is to prevent longshore drift. Groynes are very useful and are the cheapest and most effective way of protecting a cliff and the beach behind it. ...read more.

Conclusion

This is because this area of the beach collects the most amount of material. The beach material piles up because there is no other route for the beach material to escape to. We can also see that the further we go north,the greater the difference becomes.Thus we can assume that longshore drift is getting stronger as we go north. The North side also had a greater deposit and therefore proves again that the direction of longshore drift is northerly. What effect have the methods of coastal protection had on the scenery of the area? North Side Beautiful 2 Inviting 3 Dangerous 4 Interesting 4 Rugged 5 South Side Beautiful 5 Inviting 4 Dangerous 1 Interesting 4 Rugged 1 What are the impacts of coastal defences on the coastal processes? We compared beach profile. We marked out distances of 5 metres from the shore to cliff line. At each interval place ranging pole.Use a ranging pole and clinometer to measure the angle of beach over a 5 metre interval. Record profile angles on record sheet. Distance from sea Profile 1 0 0 5 2 10 2 15 2 20 2 25 3 30 35 40 45 50 55 60 65 70 75 Distance from sea Profile1 0 0 5 2 10 1 15 1 20 -1 25 1 30 1 35 1 40 4 45 1 50 2 55 2 60 2 65 5 70 2 75 2 80 3 Analysis From my experiments, data and Conclusion The north beach is eroding at a tremendous rate.The excessive protection on the south beahc ?? ?? ?? ?? ...read more.

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