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View Diary: Energy from the Moon (165 comments)

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  •  Fundy also shows what can go wrong (none)
    In 1968 the province of New Brunswick built the Petitcodiac Causeway upriver from Moncton.  In effect this was similar to what a barrage setup would do in that it acted as a dam.

    The end result was a disaster.  The tide, flowing upriver, was stopped dead and could only squeeze though the narrow openings.  The resulting ponding of water allowed sediment, normally held in suspension by the sloshing of water back and forth, to settle.  At Moncton the river, which averaged a kilometre wide, is now down to less than 100 metres and the tidal bore, once world famous and up to two metres high, is a few centimetres at best.

    A tidal dam would have had the same effect.

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