Barton on Sea

• Located on the South coast of England, in the county of Hampshire
• More specifically, it's situated in Christchurch bay
• Due to its location, it is affected by the South Westerly wind 

• The benefit gained from protecting the coast is greater than the financial cost of building them

The following human activities are being protected:

• Houses with high value
• Major settlements
• Historic buildings (churches and castles) 
• Two links golf courses
• A main 'A' road and a large scale railway

• The construction of groynes from Bournemouth to Hengistbury Head has stopped long-shore drift therefore the beach at Barton on Sea has reduced in size
• This consequently leads to the erosion from the waves powered by a 6000km fetch on the cliff itself.
• The main reason for the rapid cliff retreat however is the rock structure of the cliff and the effect that sub-aerial processes have on it.
• When it rains, the water infiltrates through the permeable sand and is absorbed by the porous clay. Overtime, the clay becomes saturated until a slip zone is created between the sand and the clay.
• Because the pressure is too great, rotational slip occurs into the sea and the material is carried away by the sea exposing fresh rock and the process repeats itself.

• De-watering drainage system 
• Regraded slopes 
• Vegetation on the cliff face
• Perforated drainage pipe drains
• Interlocking sheet piles 
• Fan-shaped drains
• Revetment 
• Rock armour
• Wooden groynes

Together these strategies help to: stabalise the cliff face, help filter the water, lessens marine erosion, lowers the effects of gravity on slumping.

• Using a de-watering drainage system inland due to the large volumes of precipitation
• Regrading the slops to lessen the slumping effect
• Use lots of vegetation to keept the cliff face stable
• Use rip rap to reduce the power of the waves