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Tidal asymmetry in an estuary matters because it

  • A.produces a net residual transport of sediment landward or seaward
  • B.changes the total volume of water that is exchanged on each cycle
  • C.eliminates the need for maintenance dredging
  • D.prevents any sediment from entering the estuary

Answer: A

A shorter and stronger flood than ebb tends to import sediment and infill the estuary. Understanding the asymmetry is essential to predicting siltation in ports and channels. Asymmetry decides the direction of net transport.

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