A recent study published in the Journal of Nature Cities highlights the significant sinking of 28 major US cities, including New York, Dallas, and Seattle, threatening the structural integrity of buildings and infrastructure. Conducted by researchers from Virginia Tech, the study utilized satellite radar measurements to analyze urban land subsidence, primarily caused by groundwater extraction. They found that in at least 20% of urban areas, structures are at risk, with over 29,000 buildings in high-damage zones.
Cities like Houston and Fort Worth have the highest sink rates, exceeding 4 mm annually, with specific areas sinking even faster. This subsidence is exacerbated by climate change impacting infrastructure through extreme weather events and rising sea levels, although these factors weren’t included in the subsidence analysis. Researchers emphasized that localized variability in sinking presents unique risks to urban infrastructure, particularly in rapidly growing cities.
Overall, the study underscores the urgent need for more awareness and strategies to mitigate the risks posed by subsidence in cities across the US.
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