Discussion
The stable planform of a bay between two headlands is often described by
Answer: C
Correct answer: a logarithmic spiral or parabolic bay shape relationship
A bay in static equilibrium takes a curved form in which the shoreline everywhere meets the dominant wave crests at the same angle, so no net longshore transport occurs. The logarithmic spiral and the parabolic bay shape equation are the two standard descriptions, both fitted to the wave approach direction and the position of the updrift control point. They are the design tool for artificial headland schemes.
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