• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month
Page
  1. 1
    1
  2. 2
    2
  3. 3
    3
  4. 4
    4
  5. 5
    5
  6. 6
    6
  7. 7
    7
  8. 8
    8
  9. 9
    9
  10. 10
    10
  11. 11
    11
  12. 12
    12
  13. 13
    13
  14. 14
    14
  15. 15
    15
  16. 16
    16
  17. 17
    17
  18. 18
    18
  19. 19
    19

Investigate the dominant Coastal processes acting on Porlock bay and also consider suitable management strategies for Porlock bay.

Extracts from this document...

Introduction

Introduction Aims: * To investigate the dominant Coastal processes acting on Porlock bay. * To consider suitable management strategies for Porlock bay. This is an Investigation into the Coastal processes occurring in Porlock Bay, Exmoor National Park. Porlock bay is a bay that has two points, which are Gore Point and Hurlstone Point. These two points were built because there was soft rock in between two hard rocks so it became a bay. This is a famous area for the tourists that go on holiday there because it is quiet and has beautiful natural scenery. It is also famous because of its geographical processes. This bay also has farmland growing on it. Hurlstone point is at the West of Porlock Beach and is in the position of the end of Long Shore Drift. Therefore Hurlstone point had more rounded rocks. Hurlstone Point also has a cliff stopping the Long shore drift so that's why it might have more shingle on this point because the cliff (fig 1) acts as a natural barrier that blocks the rocks so they build up. (A map of the 2 points is provided on the next page) Gore Point is in the east of Porlock Beach and is in the position where LSD starts because the winds refracting and creating waves that hit at Gore point in a West direction. Because Attrition wouldn't be able to start its process, the rocks here are angular and sub-rounded. This place also has a groin that is man made. These are pictures of the 2 points on the next page: Photos of Hurlstone and Gore Point Coastal processes involves a lot of things, like what influences Coastal processes like: 1.Geology Geology is the type of Earth you are investigating for example there is hard rock which is more resistant and soft rock which is more vulnerable to coastal erosions. (Fig 2, 3, 4) ...read more.

Middle

5.0-7.4cm 23 78 7.5-9.9cm 28 53 10.0-12.4 41 30 12.5-14.9 33 19 15.0-17.4cm 35 4 17.5-19.9cm 15 7 20.0+ 25 0 Discussion and Analysis In this section I will discuss and analyse the graphs that I have created. Pebble Size I will start with the Bar graph that shows the Pebble size in Gore Point and Hurlstone point. We can see from this graph that 5.0-7.4cm sized pebbles were most common with 78 pebbles in Hurlstone Point and 20+ sized pebbles were least common with 0 pebbles. At Gore Point we found that 10.0-12.4sm sized pebbles were most common and 0-2.4cm sized pebbles were least common. (Fig 16) The reason for these results is all to do with Attrition and Abrasion. Attrition hadn't taken place at Gore Point because that is where the process starts by the North Sea Winds refracting and attacking the Headland, therefore there are bigger pebbles in Gore Point. But because of Long Shore Drift Hurlstone Point has smaller pebbles because the Pebbles were rubbed against each other, therefore chipping the Pebbles into smaller pieces. Abrasion also takes of making the pebbles smaller because the Pebbles get slammed or hurled at the headland also breaking it into smaller pieces. My hypothesis stated that the pebble size at Gore point will be bigger than in Hurlstone Point because attrition hasn't had a chance to take place and my results agree with this. Pebble Shape The Pie Charts shows the pebble shape at Gore Point and Hurlstone Point. We can see from the Pie chart that Sub Rounded pebbles were the most common at Gore Point with 30% of the pebbles and the least common type of pebble was the Very angular Pebbles with only 6% of the pebbles. But at Hurlstone Point the most common pebble is Very Rounded with 54% and the least common is the Very Angular pebbles with 0% of pebbles. ...read more.

Conclusion

This is because Hurlstone point is at the stage of the end of long shore drift which means attrition and abrasion has taken place. Attrition and abrasion is when the pebbles either bump into each other or rub/roll onto each other. For this reason the pebbles are then chipped into smaller pieces. My hypothesis was correct as my results of this investigation comply with the things that I hypothesised would happen. "The pebbles at Gore point will be more larger because attrition hasn't had any chance to begin its process while the rocks in Hurlstone point will be smaller because attrition chips of rough edges as the rocks knock onto each other." Long shore drift affects the pebble size in Porlock bay in the way that in Hurlstone Point there is smaller pebbles than there are in Gore Point. (Fig 21, 22) Hypothesis 3: Pebble Shape My conclusion for the Pebble Shape is that the pebble shape at Hurlstone was more proned to be rounded and in Gore Point the most common shape is sub-rounded. The reason for this is very similar to the reason in pebble size. Attrition and abrasion has taken place in Hurlstone point because it is in the process of the end of long shore drift and in Gore point it is in the beginning of long shore drift therefore more angular pebbles were found. My hypothesis was correct as my results states that the pebbles are more rounded at Hurlstone Point than in Gore point. "I also hypothesise that the pebble size will be bigger at Gore point and the pebbles at Hurlstone Point will be smaller because attrition/abrasion hasn't occurred in Gore point because long shore drift hasn't started yet and long shore has ended at Hurlstone point therefore Hurlstone having smaller pebbbles." Long shore drift has affected Porlock bay in the way that it made the pebbles at Hurlstone point more rounder than the pebbles at Gore Point. (Fig 21, 22) 1 1 ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our AS and A Level Coastal Landforms section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related AS and A Level Coastal Landforms essays

  1. "An investigation into the methods of coastal management along Brighton's Coastline and the reasons ...

    Brighton Pier has three fantastic bars? Methodology For this fieldwork of Brighton, we need a numerous number of schemes to continue our work on the studies of costal management and tourism. The countless data collection comprises groyne measurements; beach profile; pebble analysis, which was all carried out in the beach.

  2. Coastal Processes

    Page 32 * Photo of pebble sample ---------------------------------------. Page 33 * Possible Minehead solutions --------------------------. Pages 34 to 36 * Solutions - Recurved sea wall information ------------ Pages 34 & 35 * Solutions - Rock armour information ------------------------- Page 35 * Solutions - Beach nourishment information ------------------ Page 36 * Minehead methods --------------------------------------------.

  1. An investigation into how beach material varies in shape and size up the beach.

    flat, I was going to find smaller sediment and then from 13.5m to 14.5m I would find larger sediment as the profile gradient increased greatly. This was the reason that I chose to collect pebbles at the same points as measuring the profiles as it allowed me to identify the size of sediment I was likely to pick up.

  2. The Holderness Coast

    Conclusion Firstly, I have already made my conclusion on which is the best-protected coastline; Hornsea is by far the most protected, followed by Mappleton and finally Barmston. The amount of protection an area of the coastline receives is usually dependent on what areas of value are there.

  1. "Tourists are in conflict with the Sand Dune ecosystem at Oxwich Bay Nature Reserve".

    The distance and angle in degrees were recorded. 5) The final detail to record was the soil depth at the midpoint of the same five-meter baselines (two point five metres). To get this detail the group would gently push a metre rule graduated in centimetres into the soil. When the rule could not be pushed further the group would record the depth in centimetres as the depth of soil.

  2. Investigate the effects of costal processes on Porlock Bay in Somerset and also to ...

    An example of a soft rock is red marl. The erosive agents of the sea affect the coast of Somerset. The constructive agents build the beaches on the coast of Somerset. However, the destructive agents also will erode the coastlines of Somerset.

  1. Does management affect coastal processes at Walton-on-the-Naze?

    This is why beaches are usually sloping towards the sea to make the waves break and decreases the energy they have. The incoming destructive waves break on the sand and cause a weak swash up the beach followed by a strong backwash which has more energy than the swash and

  2. GCSE Georgraphy Coursework: Coastlines

    Disadvantages: unsuitable for high energy conditions. Short life span. Used: In West Runton and Sheringham Type: Beach nourishment Description: Beach made higher and wider by feeding sand and shingle brought in by lorries or dredgers. Often used to 'protect' hard defences. Average cost: �20/cu.m Effect: Beach more able to absorb wave energy, particularly in storm conditions. Advantages: Very effective.

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work