quiz 17- types of coastal management

Question 1

What are 4 hard engineering strategies

Answer 1

Groynes,sea wall,gabions and rock armour

Question 2

What are groynes?

Answer 2

Long rock or wooden barriers built at right angles along the beach

Question 3

How do groynes protect the coast?

Answer 3

The groyne stops longshore drift which means the beach builds up reducing erosion

Question 4

What are the advantages of Groynes

Answer 4

their effective for 40 years
their cheap

Question 5

What are the disadvantages of Groynes

Answer 5

its unattractive to tourists
makes it hard to walk along the beach

Question 6

What are sea walls?

Answer 6

A curved wall made out of concrete built on the edge of the coastline

Question 7

How do sea walls protect the coast

Answer 7

The sea wall reflects wave energy back into the sea. As a result the backwash doesnt remove land

Question 8

What are the advanatages of sea walls

Answer 8

can reduce coastal flooding
are affective for many years

Question 9

What are gabions?

Answer 9

Metal cages filled with rocks and placed in areas vulnerable to erosion