Coastal management strategies.

Hard Engineering

Sea Walls:

• Often built in front of seaside resorts.
• Very expensive.
• They aim to completely block the waves and their effects.
• Life span of approximately 75 years.
• Can cause the erosion of the beach in front of them.
• Socially reassuring for local residents.

Wooden Groynes:

• Wooden "fences" built at right angles to the coastline.

• They aim to stop the movement of material along the beach due to long shore drift.
• Their primary intention is to build up the amount of sand on the beach.
• They have a life span of approximately 25 years.

Gabion Groynes:

• Large steel mesh cages filled with large rocks.
• Aligned at right angles to the coastline.
• They aim to do a similar job to wooden groynes.
• Expected life span of 20 - 25 years, as the steel will rust.

Rip Rap / Rock Armour:

• Large boulders, of 10 tonnes or more, are used as a sea…