Coastal Sea Defences

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What are seawalls?
Concrete barriers that deflect waves
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What do seawalls usually have?
curved faces
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Are seawalls hard or soft engineering?
hard
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What is one advantage of sea walls?
they are effective
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What is one disadvantage of seawalls?
Expensive to build and maintain
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what do gryones do?
trap sediment being moved by LSD.
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Are gryones hard or soft?
hard
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What is one advantage of gryones?
create wider beaches for tourists
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What are 2 disadvantages of gryones?
Look unattractive & create uneven beaches
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What are gabions?
Wire cages filled with rocks
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What do gabions act as?
Buffer to the sea and absorb wave energy
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What is one advantage of gabions?
cheap to produce
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What is one disadvantage of gabions?
ugly until vegetation grows
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Are gabions a type of hard or soft engineering?
hard
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What is rock armour?
Piles of boulders dropped at cliff base
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What is an advantage of rock armour?
Cheap and easy to maintain
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What is a disadvantage of rock armour?
cant restrict acess
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Is rock armour hard or soft engineering?
hard
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What is beach nourishment?
adding shingle or sand to an existing beach
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What is an advantage of beach nourishment
easy to do
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What type of engineering is beach nourishment
soft
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what is a disadvantage of beach nourishment?
needs constant maintenance
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What is dune regeneration?
Natural features act as buffers to sea
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What is an advantage to dune regeneration?
relitavely cheap
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What type of engineering is dune regeneration
soft
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What is a disadvantage of dune regeneration?
time consuming to plant the marram grass
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What is dune fencing?
fencing constructed on seward face of sand dunes
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What does dune fencing do?
encourage new sand dunes to form and protect existing ones
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What is an advantage of dune fencing?
minimal impact on natural systems
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What type of engineering is dune fencing?
soft
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What is a disadvantage of dune fencing?
regular maintenance needed
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Other cards in this set

Card 2

Front

What do seawalls usually have?

Back

curved faces

Card 3

Front

Are seawalls hard or soft engineering?

Back

Preview of the front of card 3

Card 4

Front

What is one advantage of sea walls?

Back

Preview of the front of card 4

Card 5

Front

What is one disadvantage of seawalls?

Back

Preview of the front of card 5
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