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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.
Groundwater use and pumping in the area was the major water use for farmers and agriculture in the 1920s, and over time, this over-pumping resulted in land subsidence and a decline in groundwater-level resources. In time, this resulted in major land subsidence by the 1970s with local areas having 0.30 to 8.5 m (1 to 28 ft) of subsidence.
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.
About 2,250 additional people in Wilmington will be exposed to high-tide flooding if subsidence continues at the same pace, the researchers found, with the value of homes exposed to flooding in ...
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 ...
As Southern California recovers from last month’s devastating wildfires, heavy rain resulted in pockets of flooding, blocked roadways and mud piling up around recent burn scars.
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.