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Is there a problem of costal management at Porlock Bay?

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Introduction

Aim - Is there a problem of costal management at Porlock Bay? Many coastlines in MEDC's and LEDC's are heavily populated. The coasts provide many people high with income from tourism and leisure activities. Some coastlines also have a high economic and land value. Coastlines are sometimes prone to flooding or erosion from costal processes. Coastlines are fragile natural environments, which are easily damaged by the whether and people. If they are destroyed, the ecosystems can take a long time to recover from the devastation. Flooding is s problem at Porlock Bay; this is shown in the salt marsh that has formed from flooding in between Gore Point and Hulstone Point. This area is shown where the arrows are pointing How would costal protection systems be suited for Porlock Bay? Groynes The groynes can be made of wood, steel or rock. The groynes are supposed to protect the beach by creating a barrier. This will stop the beach material being moved by long shore drift. There is a groyne barrier at Gore Point, which is used to protect the boats passage out of Gore Point. ...read more.

Middle

The advantage of using this type of protection would be tat it fits in with natural rock, blends in with scenery. The disadvantage of this type of protection is it is very hard to transport the rocks to the area. This type of protection costs roughly �20,000 per kilometre. A diagram of a boulder barrier is shown below - Gabions Boulders and rocks are wired into mesh cages and placed in front of areas vulnerable to erosion. The wave energy that is absorbed by the rocks limits the erosion. The disadvantage of this would be its appearance to the scenery. This type of protection costs roughly �25,000 per kilometre. A diagram of a gabion is shown below - Offshore breakwater Huge concrete blocks and natural boulders are sunk offshore to alter the wave direction and it will limit the long shore drift. This type of protection will lead to wider beaches. However, it will protect the cliffs ad settlements behind the rocks. This type of protection costs roughly �150,000 per kilometre. A diagram of a offshore breakwater is shown below - Beach nourishment Beach nourishment will replace the beach material that has been shifted by long shore drift. ...read more.

Conclusion

I would first install an offshore breakwater; I would install this type of costal management because it is relatively cheaper than the other systems. T would also choose beach nourishment because this system would be environmental friendly. I would also use the beach nourishment system because this system would also be cheaper than the other types of management systems. I would also choose this system because it would be environmentally friendly as there are no big, ugly walls to stop the problem of costal management. I have also not chosen to use groynes, sea wall or gabions because I feel that these types of protection are too expensive to use at Porlock Bay. This is because we would not get authority to spend this amount of money on costal management because of the low economic value of the cliffs it protected. I have also not chosen these other forms of costal protection because of the huge effect of visual protection. These types of systems do not fit in with the local environment that surrounds them. Overall, I think the above recommendations would suit the problem at Porlock Bay. And of course www.corseworkbank.co.uk helped me immensely - Deepak Tailor 11GS Beal High School ...read more.

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