Costal management and causes and effects of erosion/flooding

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Why coasts need to be managed

-protect hight economic value land (e.g residential, tourism, industrial, energy producing ect...)

-high population density

-protecting the environment/biodiversity

Hard engineering

-artificial methods of preventing costal erosion

-useually involve more money, machenery, cement and labour than soft engineering

Sea walls

Image result for sea wall (http://coastalprocesses.weebly.com/uploads/3/8/3/4/38346663/9853669_orig.jpg)

Concrete walls built at the foot of a clitt or the top of a beach to prevent erosion. They are ofter corved to reflect energy back to sea.

Advantages: 

  • effective at stopping erosion
  • useulally have promenades so people can walk along them

Disadvantages:

  • sea walls can be broken down and eroded
  • expensine (roughly £2,000 per metre)

Rock armour (rip-rap)

Large boulders placed at the foot of a cliff or the top of a beach. They force waves to break and absorb the energy from them

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