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The Bruun rule relates shoreline retreat to

  • A.the number of storms in a given year
  • B.the tidal range at the site
  • C.sea level rise and the geometry of the active profile
  • D.the volume of sediment supplied by the rivers of the region

Answer: C

It predicts retreat many times the rise itself, depending on the profile slope. It is widely used and widely criticised for the assumptions it makes. Its predictions can be large for gentle slopes. The result is sensitive to the slope assumed.

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