C - Barton On Sea CASE STUDY

Question 1

What coastline in the UK is vulnerable to cliff collapse?

Answer 1

Christchurch Bay in Hampshire where Barton on sea is sited

Question 2

What has Christchurch been affected by for a long time?

Answer 2

Costal erosion and cliff collaspe

Question 3

What has been lost to the sea over a number of years?

Answer 3

Buildings and recently a cafe

Question 4

What has been built to prevent coastal erosion?

Answer 4

Extensive costal defences

Question 5

What happened in 2008 that raised concerns about the vulnerability of this part of the coast to cliff collapse?

Answer 5

A landslip

Question 6

What is the prediction of older developed houses in Barton Court that are 20m from the cliff edge?

Answer 6

The local authorities predict that the houses will be lost in the next 10 to 20 years

Question 7

Give two factors about the cliffs at Barton on sea that make them prone to cliff collapse?

Answer 7

• The rocks are weak sand and clay so are easily eroded by the sea and have little strength to resist collapse
• The arrangements of the rocks cause water to ‘pond up’ within the cliffs increasing the weight of the cliffs and water pressure so encouraging collapse.

Question 8

What does the stretch of coastline face and dos this affect it?

Answer 8

• Faces the direct force of the prevailing south westerly winds
• Long fetch so waves are powerful carrying out erosion (2m a year in places)

Question 9

What flows towards the coast?

Answer 9

Several small streams that disappear into the permeable sands before they reach the sea. This adds to amount of water in the cliff

Question 10

What do buildings at the top of the cliff increase?

Answer 10

They increase the weight on the cliffs making them more vulnerable to collapse
-Interfere with drainage

Question 11

How doe marine processes cause cliff collapse?

Answer 11

The base of the cliffs are being attacked by the waves (hydraulic action and abrasion). The larger the fetch