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Manly tsunami threat: study finds 1000 reasons to care

Discussion in 'General Discussion Forum' started by Guest, Nov 9, 2009.

  1. Guest

    Guest Guest

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    AN UNDERWATER landslide on the continental shelf could send a tsunami to Sydney that would swamp the low-lying suburb of Manly and damage more than 1000 buildings, a study has found.

    The Tsunami Research Centre at the University of NSW found that a five-metre tsunami was the ''most likely worst case scenario'' and would send a wave three to four metres high down The Corso.

    The author of the study, Dale Dominey-Howes, said it was ''likely'' that a piece of the continental shelf would one day break off and cause a tsunami as water rushed in to fill the hole, but he could not say when that might happen.

    ''Eventually an event like that will occur … but the probability is unknown.''

    While a ''moderately large continental landslide'' would be far less powerful and destructive than the 2004 tsunami that devastated parts of South-East Asia, the study finds it would cause massive damage in Manly's low-lying districts.

    ''If it happened on a Saturday in December you would expect catastrophic loss of life,'' Dr Dominey-Howes said.

    The study looks at the vulnerability of buildings and estimates 169 hectares of land would be flooded up to seven metres deep in the lagoon and 1133 buildings would be damaged or destroyed.

    The study, conducted in partnership with the Sydney Coastal Councils Group, also examines the likely impact of such a tsunami hitting Maroubra.

    Because of its higher elevation, only 27 hectares would be flooded there, with a maximum depth of three metres and only 96 structures affected.

    Dr Dominey-Howes said such an event would ''prevent significant challenges to state emergency services''.

    He said the study, which identifies the vulnerability of each building, allows councils to better plan for vulnerable areas and ensure suitable design.

    The study colour codes buildings at risk. Those marked orange and red are likely to be ''complete write-offs'', Dr Dominey Howes said.

    The general manager of Manly Council, Henry Wong, said Manly was 3.5 metres above sea level and especially vulnerable.

    ''We have referred the issue of a tsunami to the local emergency management committee and asked them to model for a tsunami of up to five metres,'' Mr Wong said.

    He said the council had received advice that residents in 2500 houses would have five to 20 minutes from the time of a submarine landslide before the tsunami hit the beach. The council had to take warnings seriously.
     
  2. Dan

    Dan Administrator Staff Member Administrator 2016 Tipping Competitor

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    I bet the surfers will be stoked!

    Fear mongering fear mongering!
     
  3. The Gronk

    The Gronk Well-Known Member

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    The study also shows that a similar tsunami could be caused by George Rose doing a bomb into the water there. 
     
  4. Guest

    Guest Guest

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    The author of the study Dale Dominey-Howes sounds like some private school tosser who received a large government grant to complete this waste of time study.

    Funny how they don't mention any other beachside suburbs which are just as vunerable and at the same height above sea level.  Bondi, Newport etc etc etc
     
  5. Fro

    Fro Well-Known Member

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    I thought most beachside suburbs started at pretty much sea level :)
     
  6. The Wheel

    The Wheel Well-Known Member

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    Hopefully a tsumani would hit in the middle of summer and take out about 10,000 westies in one foul swoop.  Additionally anything to clean the Corso of those cockroach infested Kebad/Pizza stores would be of benefit to the area.
     
  7. Fro

    Fro Well-Known Member

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    that would be "one fell swoop" Wheel. :)
     
  8. Fluffy

    Fluffy Well-Known Member

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    they are pretty foul fro
     
  9. Fro

    Fro Well-Known Member

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    should it read 1 fell swoop of foul westies Fluff?
     
  10. ConcernedSupporter

    ConcernedSupporter Member

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    Meanwhile Manly Vale ends up a beachfrom suburb  :p
     
  11. Matabele

    Matabele Well-Known Member

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    If there's going to be a 4 metre wave down the Corso, hopefully it arrives around 4am on a Sunday and rids Manly of all its undesirables. 
     
  12. Canteen Worker

    Canteen Worker Well-Known Member 2016 Tipping Competitor

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    2pm on Saturday and a plethora of Parramatta and Bulldog supporters would be eradicated from the earth together.
     

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