Urban Subsidence Threatens Major Cities Amid Rising Sea Levels
• A recent study published in Nature Communications highlights the alarming issue of urban subsidence, where cities are sinking under their own weight, exacerbating the effects of rising sea levels.
• Jakarta, Indonesia, the world's most populous metropolis with 42 million residents, is sinking at an average rate of 13.7 millimeters per year, with some areas experiencing subsidence as high as 42 millimeters annually.
• Other cities such as Tianjin, China (13.5 mm/year), Bangkok, Thailand (8.5 mm/year), Lagos, Nigeria (6.7 mm/year), and Alexandria, Egypt (4 mm/year) are also facing significant subsidence.
Why It's Important?
The combined effects of land subsidence and sea-level rise pose severe risks to millions of people living in coastal cities. Jakarta, where 40% of the city is already below sea level, could see half its area rendered uninhabitable by 2050. Other cities like Lagos and Alexandria are also at heightened risk of flooding, particularly during severe storms. The uneven distribution of subsidence within cities further complicates mitigation efforts, as some areas sink faster than others. Without intervention, these trends could lead to significant displacement, economic losses, and infrastructure damage in affected regions.
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