Discussion
State whether the following is true or false.
A gentler beach profile slope implies greater shoreline retreat for a given sea level rise.
Answer: C
Correct answer: True
The Bruun retreat is the rise divided by the slope, so the flatter the profile the larger the retreat for the same rise - a 1 in 100 beach withdraws twice as far as a 1 in 50 one. This is why low-lying gently sloping coasts, which are also the most heavily populated, face the greatest shoreline change from sea level rise.
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