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Assertion (A): Beach nourishment sand should be placed landward of the depth of closure.
Reason (R): Sediment placed beyond that depth does not return to the active profile.

  • A.Both A and R are true, and R is the correct explanation of A
  • B.Both A and R are true, but R is not the correct explanation of A
  • C.A is true but R is false
  • D.A is false but R is true

Answer: A

Both are true and the reason gives the rule, and placement depth is a key design decision. Deeper placement is cheaper to dredge but may not benefit the beach at all. Placement depth is a genuine engineering trade-off.

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