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Coastal Management Essay

  • Submitted by: Beats112
  • on October 6, 2012
  • Category: Social Issues
  • Length: 1,054 words

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Below is an essay on "Coastal Management" from Anti Essays, your source for research papers, essays, and term paper examples.

Q.4b) Describe and evaluate the success of methods that might be employed to protect coastline. [15]
Answers:
There are two types of methods that are commonly used to protect the coastline. They are: 1) Hard engineering 2) Soft engineering
Hard engineering
Uses structure which aims to resist the energy of waves and tides.

Examples of hard engineering:
1) Sea walls
2) Wooden groynes
3) Gabion groynes
4) Rock Armour/Rip Rap

Soft engineering
Solutions work with natural processes and provide more environmentally approach to the management of coastal erosion and flooding. (Does not aim to stop the coastal erosion completely)
Examples of soft engineering:
  1) Beach replenishment
  2) Beach drainage
HARD ENGINEERING
Sea walls

A seawall is a form of coastal defence constructed where the sea, and associated coastal processes, impact directly upon the landforms of the coast. The purpose of a seawall is to protect areas of human habitation, conservation and leisure activities from the action of tides and waves. As a seawall is a static feature it will conflict with the dynamic nature of the coast and impede the exchange of sediment between land and sea.
Advantages
  * Protects the base of cliffs against erosion.
  * Can prevent coastal flooding in some areas.
  * Land and buildings are protected from erosion.
Disadvantages
  * A sea wall is expensive to build. (£2million to £5million per km)
  * The construction of a small section of defence can have disastrous effects further along the coast.
  * The cost of maintenance is high.

Wooden Groynes

Wooden groynes are made up of wooden fences that are built at the right angle of the coastline. They aim to stop the movement of material along the beach due to long shore drift. And their primary intention is to build up the amount of sand on the beach.
Advantages:
  * Trap sediment from long shore drift which builds up a beach.
  * Coastal erosion is severely reduced because the...

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