I know 2 advantages :
The first advantage is that is lessens the effects of longshore drift on a beach. The second advantage is that is also builds up part of the beaches with the sand becoming deeper.
Groynes prevent or slow down erosion.
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Groynes prevent or slow down erosion.
the advantages of rip rap are that it absorbs the waves energy and stops longshore drift ( like groynes) the disadvantages are that it costs alot for the granite boulders ( rip rap) to be transported! hope that helps :D
the advantages of rip rap are that it absorbs the waves energy and stops longshore drift ( like groynes) the disadvantages are that it costs alot for the granite boulders ( rip rap) to be transported! hope that helps :D
They are cheap and they retain sand.
Groynes prevent or slow down erosion.
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there are no advantages or disadvantages
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