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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.
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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.
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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[6] [page needed] In Butte, the quake caused a pendulum clock to stop at 12:42 a.m. (MST) and caused minor damage to homes. [17] Areas around Hebgen Lake were also affected as the quake caused parts of the lake to rise eight feet (2.4 m). Roads and highways running along the shores of the lake collapsed into the water.
MANAWA – The city of Manawa, in central Waupaca County, has some cleaning up to do. Up to 100 homes, including a nursing home, were evacuated Friday after erosion caused the bank at the edge of ...
Virginia City was the first silver rush town, and the first to intensely apply large-scale industrial mining methods. [ 4 ] [ 5 ] After a year in existence, the boomtown had 42 saloons, 42 stores, 6 restaurants, 3 hotels, and 868 dwellings to house a town residency of 2,345.