Cliff Collapse/Coastal Erosion Case Study - Geography GCSE

Case study for Coastal Zone 
Barton-on-sea used as case study 

HideShow resource information
  • Created by: Né M
  • Created on: 31-05-12 11:55


Location: Barton-on-sea, Hampshire
                 Various areas at Holderness

 Why Cliff collapse occurs at Barton-on-sea:

  • The coastline faces the direction of the prevailing wind. There is a long fetch, so the waves are powerful and carry out a lot of erosion - upto 2m a year.
  • The rocks are made up of weak sands and clays
    - They are easily eroded by the sea - have little strength to resist collapse
  •  Water 'ponds up' between the layers of rock - permeable sands and impermeable clays - causing the weight of the cliffs to increase
  • Water from small streams that flow towards the sea is absorbed into the permeable sands - adding to the amount of water in the cliffs, and therefore increasing the weight of the cliff
  • Buildings on the cliff increase the weight of the cliff, making them more vulnerable to cliff collapse
1 of 4

Impacts on people at Barton-on-Sea

  • A number of buildings have been lost
  • Most recently a café was lost
    -jobs lost as well as money
  • Houses are just 20m from the edge of the cliff and are predicted to be lost within 10 to 20 years
2 of 4

Erosion at Holderness

Reasons for erosion:

  • Cliffs are made of clay which is soft and easily eroded
  • There eroded material is carried away, so there are narrow beaches, which means that there is less protection for the cliffs from the waves (as wider beaches slow down the waves and reduces there energy)
  • Groynes have been built at Mappleton, meaning sediment is prevented from moving up the coast - so beaches are narrower and more easily eroded in some places.
  • The waves are very powerful as Holderness faces the prevailing wind and the waves travel over a long fetch, the waves are highly erosive.
3 of 4

Impacts on People and the Environment

  • Homes near cliffs are at risk at collapsing into the sea
  • -Property prices are low - difficult to sell property
    -Insurance prices are high due to high risk
  • Access to some settlements is affected as roads near the cliffs are at risk of collapsing 
  • Businesses are at risk
    -people lose jobs
  • At Seaside Caravan Park, the erosion means 10 pitches are lost a year - so losing money and customers
  •  A gas terminal is at risk, being only 25m from the edge of the cliff
    -25% of Britain's supply of gas goes through that terminal
  • 80,000m^2 of farmland is lost each year 
    - this has a huge affect on the farmers' livelihood
  • Some Sites of Special Scientific Interest (SSSI) are threatened
4 of 4


No comments have yet been made

Similar Geography resources:

See all Geography resources »See all Coastal zones resources »