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Subsidence In The Bangladesh Basin

April 7, 2021

By Paul Homewood

 

 

Just returning to that Bangladesh piece yesterday, there is section at the end which includes a couple of relevant comments:

 

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https://www.bbc.co.uk/news/world-asia-56485667 

We often hear complaints about how Bangladeshi farmers are increasingly affected by flooding. This should be of little surprise when the land has been subsiding for a long time. There is also a very good reason why people in the past chose to live on higher land!

 

The problem of subsidence has been well known for a long time, and it is widespread across the Bengal Basin, and not just the local district described above:

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https://link.springer.com/chapter/10.1007%2F978-94-015-8719-8_9

 

Absolute sea levels are rising by about 2mm a year, yet the land is subsiding by 2.2cm a year. A small part of this is due to isostasy, but most is evidently the result of “dewatering”, what we would call water extraction. (see here)

Whatever problems farmers in Bangladesh are having, it has nothing to do with climate change.

15 Comments
  1. April 7, 2021 11:08 am

    Bangladesh is effectively a huge delta and so is naturally subject to flooding. When India gained its independence, the government decided to improve what is now Bangladesh by building roads in the water channels that the Brits had previously constructed as part of the flood alleviation system in the delta. It was only later that they realised their mistake. That and the subsidence has resulted in Bangladesh inheriting a permanent problem.

    • April 7, 2021 11:47 am

      Not all parts of it is delta. Specifically, Sylhet is actually part of the Assam hill country of India. Not sure how it ended up in Bangladesh.Also the chittagong hill country is not part of the Delta. And the northern end of the country you’re a bus ride away from Bhutan.

  2. April 7, 2021 11:39 am

    Thank you. Appreciate the level of detail in these analyses. Your accounting background I guess.

  3. MrGrimNasty permalink
    April 7, 2021 11:40 am

    Yes, we/the BBC have been there many times before – Ganges, Mississippi, Mekong………. same deceit.

    Here’s more BBC bad faith renewable promotion. They think the fact that the wind happened to surge at noon Easter Sunday, coinciding with PV peak and low demand, is a ‘success’. Why didn’t the BBC give such prominence to the times the grid nearly failed and was saved by gas/coal over the last six months?

    https://www.bbc.co.uk/news/uk-56657299

  4. MrGrimNasty permalink
    April 7, 2021 11:59 am

    I caught a bit of that awful Vine person’s show, all woe is me the Polar Bears can’t adapt to living off bird eggs and they are all going to die – I guess he had somehow come across this bit of irrelevant pointless fretting.

    https://academictimes.com/polar-bears-arent-very-good-at-hunting-bird-eggs-but-it-could-be-important-to-their-survival/

    I really can’t believe that eggs will ever be more than a distracting morsel in their diet, and being ‘bad’ at finding them is never going to be a significant factor – how many eggs equals one seal!

    https://polarbearfacts.net/how-much-do-polar-bears-eat/

    • Chaswarnertoo permalink
      April 7, 2021 3:49 pm

      When I was born there were only around 5000 polar bears left. Now, due to gorebull warming there are only 35,000, sadly…..

      • MrGrimNasty permalink
        April 7, 2021 6:49 pm

        Old joke at Gore’s expense! But yes +800 average a year is the current going rate going by the last population estimates I saw.

  5. paul weldon permalink
    April 7, 2021 1:43 pm

    And not forgetting the effect of hydro on both the flows of the Brahmaputra and Ganges. Apart from altering when the water flows, it stops sediment from being washed down to the delta.

    • Chaswarnertoo permalink
      April 7, 2021 3:51 pm

      Yep. O level geography, deltas need sediment deposits or they sink and erode.

  6. Bloke down the pub permalink
    April 7, 2021 1:53 pm

    With population growth like that, it’s just as well that the land area has been increasing over the years with river silt being deposited to form new land. This new land is, of course, the most vulnerable when a cyclone blows in.

  7. April 7, 2021 4:22 pm

    Bangladesh is the land on which climate hysterics like to project their fantasies, the doomsters’ Xanadu.

    I once wrote an article about a poor Bangladeshi woman who was flown in to the West of England to explain to a group of climate obsessed psychotherapists her sufferings at the hands of global warming. (The fact that her husband had recently been eaten by a tiger seemed less important to them than the rise in sea level.) I googled around to try and find information on the country’s land surface area, and found everywhere the same very approximate figure, which I eventually traced back to the World Bank country-by-country data base, and to a particular graph, which consisted of a single horizontal line. The World Bank had made a rough guess at the surface area of Bangladesh in 1964 and hadn’t updated their graph since. A quick check with the country’s statistical office website revealed that the surface area has been increasing, thanks to sensible land reclamation policies and the aid of Dutch engineers.

    Climate hysteria is the biggest machine for the manufacture of ignorance since the Church’s monopoly of education.

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