Hard Engineering methods to Costal Erosion and Weathering Flashcards Preview

Geography Yr 10 Physical - Waves, Coasts, Sand dunes Book > Hard Engineering methods to Costal Erosion and Weathering > Flashcards

Flashcards in Hard Engineering methods to Costal Erosion and Weathering Deck (13)
Loading flashcards...
1
Q

State the four main Hard Engineering methods

A

Groynes, Sea walls, Rock armour and Gabions

2
Q

What is a gabion?

A

Rocks held in cages

3
Q

What is a groyne?

A

Wooden or rock walls/structure that builds a beach by trapping sediment.

4
Q

What is a rock armour?

A

Large boulders placed at the foot of a cliff. It breaks waves and absorbs their energy

5
Q

What is a Sea wall?

A

Concrete walls placed at the foot of a cliff. They reflect energy back into the sea.

6
Q

Benefits of rock armour

A

cheap, easy to maintain and long lasting

7
Q

Disadvantages of rock armour

A

Expensive, unattractive, hard to transport, difficult access to beach and littler can get stuck in rocks. People and animals can get hurt. Prevents breeding sites for animals.

8
Q

Benefits of Gabion

A

cheap, blends in and long lasting

9
Q

Disadvantages of Gabion

A

not strong, unnatural, injurious to birds and humans and regular maintenance needed.

10
Q

Disadvantages of sea wall

A

Expensive, unnatural, expensive repairs, long construction times and restrict access to beach.

11
Q

Advantages of sea wall

A

Can last for long time and gives a sense of security

12
Q

Advantages of groyne

A

Builds a beach, cheap, long-lasting and easy access

13
Q

Disadvantages of groyne

A

Unattractive, dangerous to surfers and starves beaches of sand further down the coastline increasing rates of erosion elsewhere.