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American Focus > Blog > Tech and Science > 28 big American cities are sinking
Tech and Science

28 big American cities are sinking

Last updated: May 11, 2025 11:38 pm
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28 big American cities are sinking
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The sinking of major urban areas in the United States has been a well-known issue, but a recent analysis has shed light on the extent of this problem. A study published in the journal Nature Cities on May 8 revealed that all 28 most populated cities in the country are sinking at a rate of two to 10 millimeters per year. The primary cause of this phenomenon is groundwater extraction, driven by the increasing demand for freshwater.

While a decrease in land elevation of less than an inch per year may seem insignificant, it can have significant consequences. The structural integrity of buildings, roads, bridges, and dams can be compromised by land subsidence. Satellite-based radar measurements were used in this study to create detailed maps of subsidence in urban areas, including cities like New York, Dallas, and Seattle, which are home to a significant portion of the US population.

The lead author of the study, Leonard Ohenhen, emphasized the potential risks associated with sinking land, such as increased flood hazards and infrastructure instability. In cities like New York, Chicago, Seattle, Denver, and Houston, the rate of subsidence ranges from two to five millimeters per year, with certain areas in Houston sinking as much as 10 millimeters per year.

Signs of sinking land include cracks in buildings, misaligned doors and windows, warped roads, tilting utility poles, and increased local flooding. These indicators can be early warning signs of ground sinking or differential settlement, which, if left unaddressed, can lead to serious consequences.

The study highlights the need for cities to integrate land subsidence monitoring into urban planning policies to mitigate risks. Managing groundwater extraction and implementing long-term monitoring strategies are recommended to prevent further land degradation and infrastructure damage. By addressing the root causes of land subsidence, such as excessive groundwater withdrawal, cities can work towards solving this pressing issue and safeguarding their infrastructure for the future. Urban development is an essential aspect of modern society, but it comes with its challenges. One such challenge is the sinking of cities due to various factors such as groundwater depletion, soil compaction, and poor infrastructure resilience. However, there is hope. With better monitoring, smarter urban development, and policies that address water use and infrastructure resilience, we can slow or even stop the sinking—and protect our cities for future generations.

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One key aspect of addressing city sinking is better monitoring. This involves using advanced technologies such as satellite imaging, GPS, and sensors to track ground subsidence and identify areas at risk. By monitoring these changes in real-time, authorities can take proactive measures to prevent further sinking and protect vulnerable areas.

Smarter urban development is another crucial factor in addressing city sinking. This involves planning and designing cities in a way that minimizes the impact on the natural environment and reduces the risk of sinking. For example, using sustainable building materials, implementing green infrastructure, and promoting water conservation can help mitigate the effects of sinking and ensure the long-term stability of cities.

Policies that address water use and infrastructure resilience are also essential in tackling city sinking. By implementing regulations that promote water conservation, reduce groundwater pumping, and improve the resilience of infrastructure, cities can better withstand the pressures that lead to sinking. Additionally, investing in sustainable water management practices and upgrading aging infrastructure can help prevent future sinking and ensure the long-term sustainability of cities.

Overall, addressing city sinking requires a multi-faceted approach that combines monitoring, urban development, and policy interventions. By taking proactive measures to protect our cities, we can ensure that future generations have a safe and stable environment to live in. It’s time to prioritize the health and resilience of our cities and work towards a sustainable future for all.

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