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The CERC formula relates longshore transport to

  • A.the tidal range at the site
  • B.the mean grain size of the beach material considered alone
  • C.the depth of water at the shoreline
  • D.the longshore component of wave energy flux at breaking

Answer: D

It is the most widely used first estimate despite taking no account of grain size. Later formulae such as Kamphuis add sediment and slope terms to improve the estimate. Grain size affects transport rates substantially.

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