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"What management is there at Freshwater Bay and how effective is it?"

Extracts from this document...

Introduction

Introduction to the Investigation The purpose of this investigation is to test the following research question: "What management is there at Freshwater Bay and how effective is it?" Fundamentally this means that I am going to study the area of Freshwater Bay then test and examine what positive or negative effects the management has on the area. My research and findings are going to test the question to find an answer. In order for me to answer this question I am going to break it down into two main sections: * In what way does management of the bay change it from east to west? In this study I am going to examine how the management schemes are effecting the beach, and in what ways it its doing this. * What is the main land use behind the bay and how is management protecting it? In this study I am going to examine the land use at Freshwater Bay and see what the management is being used to protect. Location Location of the area: The Isle of Wight is and island 380km�, and is situated off the southern coast of England in the English Channel. The island itself is represented as one of the counties of England and has a population of 111,300 people. Freshwater Bay is situated on the South East coast of the Isle of Wight. The A3055 is the main road that runs along the west cliff top and down through the Freshwater area. ...read more.

Middle

> 2 stacks formed in area of bay, sign of heavy erosion in area. At low tide level a wave cut platform can be seen showing more signs of erosion. Studying this evidence it is clear that where there is management and beach security there is very little to no erosion or recession, but where there is neglect and lasse fair techniques there is heavy erosion. I had predicted on this finding, and it appears the management schemes in the area are doing their job to a high standard. Photographs - taken from a Medina Valley sub-site Figure Analysis DR5 Shows where the management area stops. Housing development shown to be very close to cliff and how cliff is slumping. Other management techniques are shown, litterbins can be seen, shows high levels of care for area. Sea wall can be seen, 1 foot above label of pavement and holds back sediment washed up by sea effectively. Second set of housing can be seen, appear very close to edge of cliff, area of very little or no management, chance of housing disappearing in near future. Photo clear in showing effectiveness of the management in the bay area. Area of bay with little management being rapidly eroded, side with management very little signs of erosion and no erosion at all. DR6 Shows eastern cliff face and lack of management. Shows where old road used to be and how much has been eroded. 2 stacks on cliff point there due to heavy erosion taking away large area of cliff. ...read more.

Conclusion

Null hypothesis: H� - no significant difference in beach material. Alternative- H� - slight difference in beach material. I have then put my results from my recording sheets into the table below: Site 2 Rank Site 5 Rank 72 19 49.3 10 63 16 59.6 15 37 4 45.3 9 45 8 69 18 55.3 12 34.6 2 62.3 14 52.3 11 24.6 1 40.6 5 57 13 68.6 17 43.3 6 101.6 20 34.6 2 44.6 7 Total= 95 (?R1) Total= 114 (?R2) U= test statistic N1+N2= number in each sample ?R1 and ?R2= sum of ranking in each sample Formulas: Site 2 Site 5 U1= N1N2+1/2N1(N1+1)- ?R1 U2= N1N2+1/2N1(N1+1)- ?R2 U1= 100+111 - 95 U2= 100+111 - 114 2 2 U1=60.5 U2=41.5 Looking at the Mann Whitney U tables 23 is the significance value because we have 10 values, and we have a significance value of 95%. The smallest value 41.5 is slightly larger than 23 so I am 5% sure that there is a difference between material sizes in site 2 and in site 5, this means I have to accept the null hypothesis. From my results I can see that there is a difference between the sites in term of sediment sizes. At the sites that have management there are very large sizes of sediment, which is due to the particles being trapped by the groynes and the sea wall. Whereas the nearer the sample is taken from the eastern cliff the smaller the sediment size is. This is yet another aid in showing how effective the management schemes are in the Freshwater Bay area. ...read more.

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