newcastle Flashcards by maria O'hare

Q

1st hard engineering strategy

A

groynes

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Q

what are groynes

A

wood thats easily eroded

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Q

an advantage of having groynes

A

easier
cheaper
trap sand

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Q

a disadvantage of groynes

A

have to be replaced

expensive

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Q

are groynes unsustainable of sustainable

A

unsustainable

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Q

2nd hard engineering

A

gabions

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Q

what are gabions

A

a cage of rocks

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Q

what is an advantage of gabions

A

slowly dissipate energy of wave

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Q

disadvantage of gabions

A

need replacement

attract rodents

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Q

3rd hard engineering strategy

A

rock armour

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Q

an advantage of rock armour

A

most effective and protects short term

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Q

disadv of rock armour

A

reduce sediment supply

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Q

4th hard engineering strategy

A

sea wall

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Q

how much did it cost to build sea wall

A

£4 mill

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Q

how long is sea wall

A

1m

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Q

advantages to sea wall

A

prevents waves from splashing over

protect built environment

Q

disadvantages to sea wall

A

very expensive

beach is eroded by refracted waves