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Dig a trench filled with water rather than build the wall?

  1. Feb 23, 2017 #1
    Might sound really stupid, but will it be more economical if instead of wall, a WIDE trench filled with water from adjoining ocean and river is allowed to flow in.

    With both the ends of the trench connected to the ocean, we can allow water to flow in during high tides, and flown out during low tides.
     
  2. jcsd
  3. Feb 23, 2017 #2

    berkeman

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    Thread closed temporarily for Moderation...
     
  4. Feb 23, 2017 #3

    berkeman

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    Last edited by a moderator: May 8, 2017
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