Coastal Management Quiz

What is the purpose of recurved sea walls in coastal management?

• To reflect wave energy back out to sea

• To stabilize sand dunes

• To absorb wave energy

• To trap sediment moved by longshore drift

What is a disadvantage of sea walls in coastal management?

• Can be attractive and used as promenades

• Interrupts natural erosion

• Relatively cheap

• Ongoing repair costs

What is the main function of groynes in coastal management?

• To trap sediment moved by longshore drift

• To stabilize sand dunes

• To reflect wave energy back out to sea

• To absorb wave energy

What is a drawback of interrupting longshore drift using groynes?

• Can increase erosion elsewhere

• Can be attractive and used as promenades

• Builds beaches for tourism

• Relatively cheap

What is the purpose of rock armour in coastal management?

• To stabilize sand dunes

• To reflect wave energy back out to sea

• To absorb wave energy

• To trap sediment moved by longshore drift

What is a disadvantage of using gabions in coastal management?

• Relatively cheap

• Short lifespan where cages rust after 5-10 years

• Interrupts natural erosion

• Can be disguised with vegetation

What is the main function of beach nourishment and reprofiling in coastal management?

• To absorb wave energy

• To reflect wave energy back out to sea

• To trap sediment moved by longshore drift

• To build a higher and wider beach to protect the coastline behind

What is a drawback of beach nourishment and reprofiling in coastal management?

• Ongoing costs- has to be repeated as the new sand is removed by longshore drift

• Natural looking and good for tourism

• Requires regular monitoring and management

• Takes a long time

What is the main purpose of dune regeneration in coastal management?

• To absorb wave energy

• To reflect wave energy back out to sea

• To build sand dunes to act as a natural barrier to erosion

• To trap sediment moved by longshore drift

What is a drawback of dune regeneration in coastal management?

• Requires regular monitoring and management

• Takes a long time

• Maintains an attractive natural environment

• Very cheap