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  • Coastlines
    • destructive
      • They are frequent and close together
      • they arrive at a rate of 13-15 waves per min
      • they are tall and steep
      • the crashing water erodes the beach
      • they have strong backwash
      • they have weak swash - not much material is deposited
      • the beach is made very steep
      • destructive waves are more common in the winter - more storms
    • constructive
      • they arrive slowly
      • rate of 6-8
      • they are shallow - so water runs gently upto the beach
      • the swash is stronger than the backwash- they deposit
      • constructive waves common in summer - less storms


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