#sinkingcities

4 months ago

[6/6] La Chine diffuse désormais son expertise vers d’autres pays. Des programmes partagés avec le Liban ou l’Indonésie montrent que la lutte contre l’enfoncement est un effort global. La #subsidence devient un marqueur clé de la vulnérabilité littorale. #geography #sinkingcities

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4 months ago

[5/6] Plusieurs villes chinoises testent des solutions inspirées des P-Bas. Shanghai a réduit son affaissement à moins de 6 mm/an grâce à la recharge artificielle de la nappe + usage d’outils de suivi. La ville compte près de 50 extensomètres vs seulement 3 ou 4 en Italie. #geography #sinkingcities

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4 months ago

[4/6] Trois facteurs humains aggravent la #subsidence. la surextraction des nappes phréatiques, le poids croissant des bâtiments et la perte d’infiltration liée à l’imperméabilisation. Ces mécanismes touchent les deltas, les plaines côtières et les mégapoles. #geography #sinkingcities

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4 months ago

[3/6] Le phénomène est mondial. Des villes comme Jakarta, Chittagong ou Ho Chi Minh Ville s’affaissent parfois de plus de 50 mm/an. Aux États-Unis, 34 millions d’habitants vivent déjà dans des zones urbaines en subsidence, ce qui accélère les risques d’inondation. #geography #sinkingcities

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4 months ago

[2/6] L’étude souligne un risque majeur pour les littoraux. En Chine 16% des sols urbains s’enfoncent de + de 10 mm/an et 1 habitant côtier / 10 pourrait vivre sous le niveau marin en 2120. Tianjin illustre ce danger avec 4000 évacuations en 2023 après une rupture du sol. #geography #sinkingcities

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Sinking cities: how China is moving subsidence research forward Faced with the double threat of rising sea levels and subsiding ground, researchers are devising plans to bring communities back from the brink.

4 months ago

[1/6] Xiaoying You décrit la montée en puissance d’un défi urbain majeur. l’enfoncement progressif des villes. Elle montre comment la subsidence s’impose comme un risque géographique clé, avec près de 50% des sols urbains chinois qui s’affaissent de plus de 3 mm/an. #geography #sinkingcities

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IGRAC

@igrac.bsky.social

4 months ago

Groundwater Depletion in a Drying World - IGRAC Aquifer depletion has led to widespread consequences globally. Find out which ones in 'Groundwater Depletion in a Drying World'.

💧Saline intrusion, land #subsidence, #water quality and access challenges. Let's look at #Groundwater in a Drying World.
🗞️ Cahal McQuillan interviewed our Director for @thelancetplanet.bsky.social.
🔗 un-igrac.org/latest/stori....
#sinkingcities #depletion #drought #climatechange #salineintrusion

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Sebastian2

@sebastian2.bsky.social

8 months ago

The Land Beneath the Biggest U.S. Cities Is Sinking, Finds New Analysis of Satellite Data Largely due to groundwater pumping and shifting of land after the last ice age, major urban areas are subsiding, which could destabilize buildings or worsen flooding

One more thing for people to deny the dangers of until it happens to them...
#SinkingCities #LandSubsidance

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Ryan Hite

@religiousryan.bsky.social

9 months ago

Jakarta Is Sinking: Inside Indonesia’s $30 Billion Capital Relocation Disaster Jakarta is sinking, so Indonesia is building a new capital—Nusantara. But the $30B project may already be failing. Here’s why.

Jakarta is sinking.
So Indonesia is moving its capital… into the rainforest. 🌴
But Nusantara is already turning into a disaster. 📍 Full breakdown: www.ryanjhite.com/2025/06/04/j...
#Indonesia #Nusantara #Jakarta #UrbanPlanning #Geopolitics #SinkingCities

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The Detroit News

@detroitnews.com

9 months ago

Study finds Detroit is sinking this much each year Detroit, along with 27 other major U.S. cities, is sinking, a recent study finds. The Motor City, the Big Apple, D-Town and the Emerald City are sinking 2 to 10 millimeters per year, according to a study of the 28 most populous U.S. cities. The study was conducted by researchers from Virginia Tech, the Netherlands Organisation for Applied Scientific Research, the University of California Berkeley, Texas A&M University, the University of Colorado Boulder, Brown University and United Nations University. It was published May 8 in Nature Cities, a monthly, online journal that features research and opinion about cities and urban issues. Leonard Ohenhen, the study's lead author, said the study found Detroit has sunk by approximately 10.2 millimeters, or about 0.4 inches, from 2015 to 2021, based on an average land subsidence rate of 1.7 millimeters per year. The study said the main reason for most cities sinking is groundwater extraction. But in Detroit, glacial isostatic adjustment is to blame, according to Ohenhen, who is a postdoctoral researcher at Lamont-Doherty Earth Observatory in Columbia University's Climate School in New York. The phenomenon is a slow, natural process resulting from the planet's response to the retreat of ice sheets following the last glacial period, he explained. "In addition, some localized settling may occur in areas built on reclaimed lands, though such cases are limited in spatial extent," the researcher said. But there's no cause for widespread panic in Detroit, Ohenhen said. "The observed subsidence in Detroit is relatively uniform, posing little to no immediate risk to infrastructure," he said. "However, even gradual sinking can exacerbate the risk of flooding in the city, particularly in areas with poor drainage or during extreme precipitation events." Not much can be done to stop it, either, according to the Ohenhen. "Because the main driver is a natural geophysical process, subsidence in Detroit cannot be mitigated in the conventional sense," he said. "Instead, adaptation is key. This includes integrating land elevation change into stormwater management, urban planning, and resilient infrastructure design, ensuring the city remains equipped to handle incremental changes over time." Ohenhen and his team of researchers used satellite data to measure the amount land sank, or what's called subsidence, for the U.S.'s 28 most populous cities. Combined, the cities are home to about 34 million people — about 12 percent of the country's total population. The study found that in every city, at least 20 percent of the urban area is sinking. Furthermore, in 25 of 28 cities, at least 65 percent is sinking. It said Houston is the fastest-sinking city, with more than 40% of its area subsiding more than 5 millimeters, or about 1/5 inch, per year, and 12% sinking at twice that rate. Some spots are falling as much as 5 centimeters, or 2 inches, per year, according to the study. The study also said two other Texas cities, Fort Worth and Dallas, are not far behind Houston when it comes to subsidence. Other fast-sinking zones were discovered in areas around New York’s LaGuardia Airport, parts of Las Vegas, Washington, D.C., and San Francisco, the study found. This article originally appeared on The Detroit News: Study finds Detroit is sinking this much each year

Study finds Detroit is sinking this much each year #Detroit #UrbanIssues #SinkingCities

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Satellite study reveals the fastest sinking city in the US Satellite data revealed that Houston is the fastest-sinking city in the U.S., and that all of the other biggest cities are dropping in at least some areas. Researchers say groundwater extraction is largely...

10 months ago

Satellite study reveals the fastest sinking city in the US #Science #EarthSciences #Geology #SinkingCities #EarthScience #SatelliteStudy

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Pure Tech

@puretech.news

10 months ago

All 28 of the U.S.’s Largest Cities Are Sinking, Study Finds A new study reveals that uneven land subsidence could impact 29,000 buildings across the America's most populated metropolises.

All 28 of the U.S.’s Largest Cities Are Sinking, Study Finds #Technology #Other #SinkingCities #UrbanStudy #ClimateChange

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@boppinmule.bsky.social

10 months ago

28 Major U.S. Cities Are Sinking, Mostly Because of Groundwater Withdrawal, Study Finds 🇺🇸 #groundwater #sinkingcities #drought #texas www.ecowatch.com/cities-sinki...

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All Major U.S. Cities Are at Risk of Sinking, Not Just Coastal Urban Areas Rapid groundwater drainage is putting buildings and people within the country’s most populous areas at risk

10 months ago

All Major U.S. Cities Are at Risk of Sinking, Not Just Coastal Urban Areas #Science #EarthSciences #Geology #SinkingCities #UrbanGeology #EnvironmentalScience

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Every Major American City Is Slowly Sinking, New Research Reveals All the science news you can handle in a single feed

10 months ago

Every Major American City Is Slowly Sinking, New Research Reveals #Science #EarthSciences #Geology #SinkingCities #UrbanDevelopment

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28 Major U.S. Cities (Home To 34 Million People) Are Slowly Sinking — Can It Be Stopped? Your home could be sinking right now, and you probably have no idea. A new study reveals that major American cities are quietly subsiding beneath our feet, with a shocking 34 million people living on...

10 months ago

28 Major U.S. Cities (Home To 34 Million People) Are Slowly Sinking — Can It Be Stopped? #Science #EarthSciences #Geology #SinkingCities #ClimateChange #EnvironmentalScience

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Countdown to Extinction

@countdown2ext.bsky.social

10 months ago

28 Major U.S. Cities (Home To 34 Million People) Are Slowly Sinking -- Can It Be Stopped? Your home could be sinking right now, and you probably have no idea. A new study reveals that major American cities are quietly subsiding beneath our feet, with a shocking 34 million people living on...

28 Major U.S. Cities (Home To 34 Million People) Are Slowly Sinking — Can It Be Stopped? #Science #EarthSciences #Geology #SinkingCities #ClimateChange #EnvironmentalScience

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Countdown to Extinction

@countdown2ext.bsky.social

10 months ago

28 major US cities are now sinking. Here's why | BBC Science Focus Magazine These 28 sinking cities are at risk of flooding, cracking and crumbling as some areas sink more quickly than others

28 major US cities are now sinking. Here's why #Science #EarthSciences #Geology #SinkingCities #UrbanGeology #ClimateChange

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