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‘Hotspots of sinking land intersect directly with population and infrastructure hubs,’ researchers warn
Drivers, processes, and impacts of sinking cities [1]. Sinking cities are urban environments that are in danger of disappearing due to their rapidly changing landscapes.The largest contributors to these cities becoming unlivable are the combined effects of climate change (manifested through sea level rise, intensifying storms, and storm surge), land subsidence, and accelerated urbanization. [2]
Miami faces a dual threat: land subsidence and rising sea levels due to climate change – a combination that increases the city’s vulnerability to coastal flooding, storm surge and erosion.
Dozens of cities along the US coastline are sinking at alarming rates, leaving them far more exposed to devastating flooding from sea level rise than previously thought, scientists reported ...
Subsidence frequently causes major problems in karst terrains, where dissolution of limestone by fluid flow in the subsurface creates voids (i.e., caves).If the roof of a void becomes too weak, it can collapse and the overlying rock and earth will fall into the space, causing subsidence at the surface.
Groundwater-related subsidence is the subsidence (or the sinking) of land resulting from unsustainable groundwater extraction. It is a growing problem in the developing world as cities increase in population and water use, without adequate pumping regulation and enforcement.
The problems had been reported in 2018 and noted as "much worse" in April 2021. A $15 million program of remedial works had been approved before the collapse, but the main structural work had not started. Other possible factors include land subsidence, insufficient reinforcing steel, and corruption during construction.
Nearly half of China’s urban areas comprising 29% of the country’s population are sinking faster than 3 millimeters per year, according to a new study.