Costal Management Flashcards Preview

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Flashcards in Costal Management Deck (21):
1

What does managed retreat do

Removes all defences and allows the sea to flood the land behind

2

Advantages of managed retreat

Cheap and easy
Doesn’t need maintaining

3

Disadvantage of managed retreat

Causes conflict with land owners
Requires long term planning

4

What is beach nourishment

Sand is pumped onto the beach from somewhere else like the sea
It is soft engineering

5

What is dune regeneration

Creating or restoring dunes by planting vegetation to stable the sand

6

Advantages of beach nourishment

Use natural materials
Gives a wider beach to slow down wave power

7

Advantages of dune regeneration

New habitat for wildlife
Provide a barrier between land and sea

8

Disadvantages of beach nourishment

Need matience regularly
Very expensive

9

Disadvantages of dune regeneration

Limited to small areas
Very expensive

10

What is sea walls

Made of concret and put at the foot of the cliff to prevent erosion

11

What is a gryone

Stops the sand moving up to beach due to longshore drift

12

What is rock armour

Big rocks put at the foot of the cliff or sea walls to protect against erosion

13

What is a gabion

A wall of wire cages filled with rocks at the bottom of a cliff

14

Advantages of sea walls

Stops the threat of flood
Stops risks of damage

15

Advantages of groynes

Cheap
Stops risk of damage

16

Advantages of rock armour

Reduce wave energy
Cheap

17

Advantages of gabions

Absorbed wave energy
Cheap and easy to build

18

Disadvantages of sea walls

Costs a lot
Not attractive

19

Disadvantages of gryones

Makes other beaches narrower
Needs constant maintenance

20

Disadvantages of rock armour

Ugly
Not safe for children

21

Disadvantages of gabions

Wire in cages can erode over time
Will need replaced every 10-20 years