Discussion
Consider the following statements about design wave selection.
1. Depth limited breaking may govern in shallow water.
2. A higher water level allows a larger wave to reach the toe.
3. The offshore extreme can be applied directly at the structure.
Answer: D
Correct answer: 1 and 2 only
Statements 1 and 2 are correct: in shallow water the wave that can reach the toe is limited by the depth, so the breaking criterion rather than the offshore extreme governs, and a higher water level admits a larger wave. Statement 3 is the error the first two exist to prevent - the offshore extreme is transformed by shoaling, refraction and breaking before it arrives, and applying it directly at the structure is wrong in either direction.
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