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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.
Mexico City is an example of a sinking city that is neither coastal nor low-lying. The city was originally constructed by the Aztecs above a large aquifer in the 1300s. Subsidence was originally caused by the loading of large Aztec and Spanish structures. The city grew rapidly during the nineteenth century, and with it, so did the demand for water.
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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.
That’s less than coastal cities to the north like Virginia Beach and Atlantic City and more than the Georgia or Florida coasts. Another geologic factor that can cause subsidence is the ...
In a 2019 study, researchers found that stretches of the California Aqueduct had sunk in a way that have caused up to 20% loss in carrying capacity of water. [15] Building foundations, pipelines, and other infrastructure may be at risk of damage as well. Areas with substantial subsidence may be at higher risk of flooding.
Land subsidence caused by groundwater depletion is also a major concern, with the ground having sunk as much as 2.4 feet in some areas since 2015, Stork said. ... orchard and a rental home near ...