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Geo- Coasts > Coastal management > Flashcards

Coastal management Flashcards

1
Q

Hard engineering

A 
Sea wall
Gabions
Groynes
Rip rap
Revetements
Barrages/breakwaters
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2
Q

Advantages of sea walls

A

Prevents erosion
Helps prevent floods
Acts as walkway

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3
Q

Disadvantages of sea walls

A

Intrusive
Can increase wave energy
Very expensive

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4
Q

Advantages of gabions

A

Relatively inexpensive
Encourages stability
Can blend with natural landscape

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5
Q

Advantages of groynes

A

Build up beach
Increase tourist potential
Relatively inexpensive

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6
Q

Advantages of rock armour/riprap

A 
Protect sea wall erosion
Relatively inexpensive
Easy maintenance
Easy construction
Used for recreation i.e fishing
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7
Q

Advantages of revetements

A

Relatively inexpensive

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8
Q

Advantages of barrages

A

Multi-use ie. HEPs

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9
Q

Disadvantages of gabions

A

Initially unsightly
Can rust
Rust poses danger i.e typhoid

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10
Q

Disadvantages of groynes

A

Prevent LSD
Ugly aesthetics
Starve downwind beaches of sediment
Problem is shifted, not solved

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11
Q

Disadvantages of rock armour/riprap

A

Doesn’t fit with local geology
Looks out of place
Intrusive
Dangerous recreational activities i.e climbing

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12
Q

Disadvantages of revetements

A

Bad aesthetics

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13
Q

Disadvantages of barrages

A

Very expensive
Potentially damaging to natural features
Disturbs natural processes

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14
Q

Soft engineering

A 
Beach nourishment
Dune restoration
Managed retreat
Land use management
Marsh creation
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15
Q

Advantages of marsh creation

A

Relatively cheap
Reverts land from semi-natural to natural habitat
Provides buffer to waves- natural defence
Creates important habitat

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16
Q

Advantages of land use management

A

Essentially sustainable

Appropriate behavioural approach

17
Q

Advantages of managed retreat

A

Creates valuable habitat- salt marsh
Creates natural flood defence- berm
Inexpensive

18
Q

Advantages of dune restoration

A

Maintains natural environment
Provides valuable habitat
Relatively cheap (£200- £2000/100m)
Sustainable

19
Q

Advantages of beach nourishment

A

Relatively cheap (£300,000/100m)
Easy to maintain
Natural looks
Increased tourist potential

20
Q

Disadvantages of beach nourishment

A

Needs constant maintenance

21
Q

Disadvantages of dune restoration

A

Time consuming

Lack of public support- people get fenced off

22
Q

Disadvantages of managed retreat

A

Loss of land
Takes time
Controversial

23
Q

Disadvantages of land use management

A

Limited uses
Prevents multi use coastal area
Leads to loss of potential income
Difficult to implement

24
Q

Disadvantages of marsh creation

A

Loss of arable farmland

Compensation costs for loss of land

Geo- Coasts (11 decks)

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