What are the different types of coastal Defences?

What are the different types of coastal Defences?

Coastal defences

  • 3.1 Groynes.
  • 3.2 Sea wall.
  • 3.3 Revetments.
  • 3.4 Breakwaters.
  • 3.5 Gabions.

What are the 4 different types of coastal erosion?

Destructive waves erode through four main processes; Hydraulic Action, Compression, Abrasion and Attrition.

What is the most effective coastal Defence?

Sea Walls. These are the most obvious defensive methods. Sea walls are exactly that. Giant walls that span entire coastlines and attempt to reduce erosion and prevent flooding in the process.

What are the 5 types of coastal processes?

There are five main processes which cause coastal erosion. These are corrasion, abrasion, hydraulic action, attrition and corrosion/solution. Corrasion is when waves pick up beach material (e.g. pebbles) and hurl them at the base of a cliff.

What are three types of coastal erosion?


  • Hydraulic action – this is the sheer power of the waves as they smash against the cliff.
  • Abrasion – this is when pebbles grind along a rock platform, much like sandpaper.
  • Attrition – this is when rocks that the sea is carrying knock against each other.

What are the 3 coastal processes?

The three principle marine processes that influence coasts are erosion, transportation and deposition.

What is a coastal defense?

Coastal defence (Commonwealth) or Coastal defense (US) may refer to: Coastal management, the protection of the coast from the action of wind, wave and tide. Coastal defence and fortification, the protection of the coast against military or naval attack.

What are the 4 main types of erosion and transportation in a river?

These are:

  • hydraulic action;
  • abrasion / corrasion;
  • attrition; and.
  • corrosion.

What are the 4 types of soft engineering?

Coastal Protection and Management – Soft Engineering

  • Beach nourishment. Beach nourishment involves adding sand and shingle to a beach from elsewhere.
  • Cliff stabilisation.
  • Dune regeneration.
  • Creating marshland.
  • Managed Retreat (coastal realignment)