Discussion
Consider the following statements about nearshore circulation.
1. Wave setup raises the mean water level inside the surf zone.
2. Rip currents return that water seaward in narrow channels.
3. Rip currents flow parallel to the shoreline.
Answer: B
Correct answer: 1 and 2 only
Statements 1 and 2 describe the circulation correctly: breaking waves raise the mean level inside the surf zone, and the excess water returns to sea in narrow rip currents. Statement 3 confuses the rip with the longshore current - the longshore current runs parallel to the shore, while the rip runs seaward across it, which is why the escape advice is to swim parallel to the beach.
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