How True is this (sinking cities)

Discussion in 'science, nature and environment' started by AnandLeo, Oct 5, 2018.

  1. AnandLeo

    AnandLeo Tipple Ripple

    From London to Shanghai, world's sinking cities face devastating floods
    "The cities named in the report are sinking for a variety of reasons. Jakarta is thought to be subsiding by 25cm a year largely because of groundwater extraction, and Houston is sinking as the oil wells beneath it are depleted. Bangkok’s skyscrapers are weighing it down, while London is slowly sinking for geological reasons: Scotland is slowly rebounding after having been weighed down by glaciers during the last ice age, which is pushing southern England downwards like a see-saw."
     
  2. NoXion

    NoXion It's been 600 years...

    Yep, some cities are sinking for various reasons. Why the skepticism?
     
    Pickman's model likes this.
  3. AnandLeo

    AnandLeo Tipple Ripple

    25cm a year. 100cm, 1m in 4 years.
     
  4. NoXion

    NoXion It's been 600 years...

    And? That doesn't seem so crazy to me. Are you assuming that the rate of movement has been uniform outside of that timespan?
     
  5. 2hats

    2hats

    Figures are about right (cm to tens of cm per year in places) - rate is non-linear and has been increasing due to various human activities eg water extraction, erosion, building load, besides natural erosion, post-glacial isostatic rebalancing, tectonics.

    See eg DOI:10.5194/piahs-372-189-2015.
     
    NoXion likes this.

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