Discussion
State whether the following is true or false.
Tapering the downdrift end of a groyne field reduces the abruptness of the erosion beyond it.
Answer: B
Correct answer: True
A groyne field ends abruptly at its downdrift limit, and the beach steps down sharply beyond it because the last compartment is full and nothing passes. Reducing the height and length of the last few groynes lets an increasing share of the drift through, so the transition is spread over a distance instead of concentrated at one point. It does not remove the deficit, but it stops it being focused where the damage is worst.
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