Evslin: Less rising seas, more sinking land

by Tom Evslin

Recently-flooded Pakistan is the poster child for “reparations” to be paid to third world countries by the developed world for the damages caused by climate change. However, the scale of the disaster is largely due to poor governance in Pakistan and local practices that won’t be cured by shoveling cash to the same kleptocrats who have swallowed up past foreign aid without improving the lives of their citizens. Almost all press accounts of the disaster fail to mention that so much water has been pumped out from under the areas which flooded that the land is sinking, a process called subsidence, much faster than seas are rising.

The monsoon rains were the worst in 40 years and may have been exacerbated by global warming (responsible scientists don’t attribute individual weather events to climate trends). There is more glacial runoff into the rivers of Pakistan than there used to be, certainly a function of higher temperatures. The seas are slowly rising. However, the disaster was preordained by the flood of people moving into the affected areas recently and deep drilling for water both to support expanded agriculture on the alluvial soil and water-hungry manufacturing in cities like Karachi, parts of which are sinking five times faster than the surrounding sea is rising. As the aquifers are depleted, the sandy soil compresses and the land above sinks. Earthquakes hasten the settling process as does the weight of new structures.

Until recently it has been almost impossible to distinguish rising ocean levels from subsiding land since the sea reaches further in both cases. However, satellite-based measurements now give us an extremely accurate measurement of both sea and land level. An article published by Voice of America in 2019 titled “Cities Sinking in Pakistan’s Baluchistan Province” discussed the sinking problem but without explicitly predicting the flooding:

“Local and American experts warn unchecked groundwater extraction in major urban centers in Pakistan’s Baluchistan province has triggered the sinking of the land at a rate of 10 centimeters a year, causing cracks in buildings, roads, and agricultural fields.

“The land subsidence is occurring in numerous locations in northern parts of Baluchistan, including districts of Qilla Abdullah, Pishin, Mastung and the provincial capital of Quetta, the largest population center in the province [nb. an area very hard hit by flooding.]

“The area is arid and groundwater is the only source of water for domestic and agricultural use, said Professor Din Muhammad Kakar of the University of Baluchistan.

“’We have drawn a lot of water from the subsurface and the over-exploration of the groundwater has triggered the phenomenon of land subsidence since 2010,’ said Kakar, who is dean and chairman of the department of seismology.”

The alluvial plain is just above sea level and historically floods frequently; that’s why the soil is rich and doesn’t become depleted of nutrients. People build just above the most recent flood level (and sometimes below it). When the land sinks, the next flood of the same magnitude will reach more land than the one before it. When there is a forty-year flood through land which has sunk and become many times more populated since the last major flood, there is predictably a disaster. That’s what happened in Pakistan.

Subsidence is a major threat in many places beyond Pakistan. A recent study measured subsidence worldwide:

“Satellite data indicate that land is subsiding faster than sea level is rising in many coastal cities throughout the world. If subsidence continues at recent rates, these cities will be challenged by flooding much sooner than projected by sea level rise models. We measured subsidence rates in 99 coastal cities around the world between 2015 and 2020 using satellite data. Subsidence rates are highly variable within cities and from city to city. The most rapid subsidence is occurring in South, Southeast, and East Asia. However, rapid subsidence is also happening in North America, Europe, Africa, and Australia. Human activity—primarily groundwater extraction—is likely the main cause of this subsidence. Expanded monitoring and policy interventions are required to reduce subsidence rates and minimize their consequences.”

An article in The Washington Post about the barriers built to mitigate flooding in Venice goes on and on about whether the wall will be effective as the sea rises. Buried at the end of the article is the main reason for recent flooding in Venice: the land the city is built on is sinking, largely because of water extraction.

It’s politically popular to attribute all disasters to climate change. Ignoring other natural and man-made causes of catastrophe – like subsidence, makes it impossible to take effective avoidance and mitigation measures. No matter how many Teslas we drive or how many dollars we pay in reparations, Pakistan and many other countries will suffer increasingly severe floods so long as water is being pumped out from under collapsible sandy soil.

Categories: Commentary

5 replies »

  1. How refreshing. Someone who appears to know what they are talking about. Hopefully the future decision makers will pay attention to facts instead of hype. Thank You Tom for trying to set the record straight.

  2. For a detailed, and very readable account of this problem, read Patrick Nunn’s “Worlds in Shadow”. Nunn has been researching the history of rising sea levels for years. He points out all the points made by Evslin. Increasing CO2 concentrations do increase the rate of warming and the rate of glacial melting and ocean levels increasing, but the sea levels have been rising for hundreds of years. Humans have been forced to move inland or to taller island, many times over the millennia to escape encroaching waters. We don’t have to look overseas for examples of land disappearing due to subsidence. The Chesapeake Islands are good examples of whole towns being deserted due to subsidence flooding.

  3. Clearly, there are many reasons for sea-level change. Subsidence, erosion, tectonic plate shifts, to name some. And just as clearly, the climate models are inaccurate. CO2 is a part of the cause. But to what extent is unclear. And the effect of man-made CO2 is even less clear. Consider the shift in the earth’s magnetic poles, the Milankovitch Cycles, and solar phases.

    A far more dangerous problem is dealing with the ‘kleptocrats’ who are profiteering from these changes as they claim to have a remedy… a remedy that, coincidentally, is also immeasurable.

  4. Yet, the wealthy own seaside property. The wealthy fly around in private jets. The wealthy own more than one vehicle. The wealthy eat whatever they want, when they want. The wealthy can buy and do whatever they want. The wealthy make everyone else pay for their privileges. The most wealthy gather at Davos to decree pesky humans where to live, what to eat, what to drive, etc. Those with the most, stand the most to lose…the boomerang coming will leave them stranded on their islands until we take those back too.

  5. Scientism: the promotion of official narratives based on ideology rather than actual scientific data.

    According to author and long-time Princeton Prof Freeman Dyson;

    1) Carbon dioxide is making the world greener; vegetation has increased 20 – 25%
    2) Computer models are NOT good predictors
    3) Climate is too complex.
    4) Sun spots and magnetic storm activity have approximate 11 year cycles; are not related to temperature or the sun
    5) A little ‘ice age’ happened @ 17th century; the sun went to sleep @ 70 years.

    According to Piers Corbyn, astrophysicist, founder of WEATHER ACTION, “We are in a war of narratives. Climate has always been changing. It has nothing to do with man. In fact, we predicted there would be extreme heat in Eastern Europe and Russia this summer. It’s caused by a circulation pattern. CO2 does NOT cause a circulation pattern. What causes those is a combination of solar activity and the state of the phases of the moon…nothing to do with mankind.”

    These are but two of many scientists who dispute the catchphrase, “climate change” as purported by the mainstream news.

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