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Is it time for Dublin (and Cork) to mitigate for rising sea levels?

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  • 15-11-2021 11:16am
    #1
    Sam Russell
    Moderators, Science, Health & Environment Moderators Posts: 19,362 Mod ✭✭✭✭


    With the prediction of rising sea levels, Dublin, from Dun Laoghrie to Clontarf should build a higher sea wall and other mitigations against the threat of rising sea levels, and build a barrier at the East Link Bridge that can be raised when the threat of flood is present.

    London built the Thames Barrier in 1984 which is much more extensive than we would require. It could be used to control the level of the Liffey as required.

    The sea wall would need to be raised by a metre or so, with the number of openings either reduced or made easier to close off during threatened flooding.

    It is not that uncommon for the sea to wash the sea road in Sandymount.



Comments

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    #2
    Sam Russell
    Moderators, Science, Health & Environment Moderators Posts: 19,362 Mod ✭✭✭✭Sam Russell


    Here is a piece from the Irish Times

    https://www.irishtimes.com/news/environment/drowning-dublin-can-the-capital-keep-its-head-above-water-1.4728486




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    #3
    Markcheese
    Registered Users Posts: 8,428 ✭✭✭Markcheese


    Well most coastal ( or with tidal waters ) places are going to need to look at where it's going ,

    Cork harbour could be done by having a dutch style barrier at the narrow entrance of the harbour , smaller towns could be very hard hit

    Slava ukraini 🇺🇦



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    #4
    hans aus dtschl
    Registered Users Posts: 3,062 ✭✭✭hans aus dtschl


    Cork is getting a concrete wall and demountable barriers around a bit of the city centre, thanks to the OPW.

    Should be grand for a good few weeks.



  • Options
    #5
    Sam Russell
    Moderators, Science, Health & Environment Moderators Posts: 19,362 Mod ✭✭✭✭Sam Russell


    Dublin requires work now to minimise flood damage. The sea wall is needed to protect much of the housing on the sea side of the Dart line, plus some on the other side of it. Much of it is on reclaimed land.



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    #6
    Bsharp
    Registered Users Posts: 195 ✭✭Bsharp


    One of the Eastern bypass design options doubled as a flood defence; now scrapped but wasn't a bad idea to meet two objectives at the time. The sea/level tidal flooding could affect places as far upstream as Ballymount on the Camac tributary.

    OPW still working on the Dodder around Ballsbridge, must be 6 years they've been working on that scheme at this stage. If that's the rate of progress we should definitely start now.



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  • Options
    #7
    MyLove4Satan
    Registered Users Posts: 326 ✭✭MyLove4Satan


    What rising sea levels? Look at coastline photos from all over the world a century ago to today. No change. Zero, Zilch, Nada. The fantastical theoretical projections of whore scientists on the grift and observable reality are two different things.



  • Options
    #8
    Sam Russell
    Moderators, Science, Health & Environment Moderators Posts: 19,362 Mod ✭✭✭✭Sam Russell


    The sea level has risen about 20 cm in the last 100 years - about half that since 1993.

    https://sealevel.nasa.gov/faq/13/how-long-have-sea-levels-been-rising-how-does-recent-sea-level-rise-compare-to-that-over-the-previous/

    Of course the weather satellites of a hundred years ago were not a good as the newer ones today.



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