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Land subsidence causes many problems including: (1) changes in elevation and slope of streams, canals, and drains; (2) damage to bridges, roads, railroads, storm drains, sanitary sewers, canals, and levees; (3) damage to private and public buildings;
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geochange.er.usgs.gov/sw/changes/anthropogenic/subside/
geochange.er.usgs.gov/sw/changes/anthropogenic/subside/
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Where fluid withdrawal is the main cause of subsidence, information on the rate of fluid withdrawal should be determined and combined with studies of the material in the subsurface based on sampling with drill core methods.
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www.tulane.edu/~sanelson/geol204/subsidence.pdf
www.tulane.edu/~sanelson/geol204/subsidence.pdf
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Land subsidence occurs when large amounts of ground water have been withdrawn from certain types of rocks, such as fine-grained sediments. The rock compacts because the water is partly responsible for holding the ground up. ... Causes of land subsidence...
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ga.water.usgs.gov/edu/earthgwlandsubside.html
ga.water.usgs.gov/edu/earthgwlandsubside.html
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The term subsidence is used in both atmospheric and geological sciences. Atmospheric subsidence refers to the sinking of air that is denser (heavier) than the air below. As it subsides, increasing air pressure compresses the air parcel, causing it to warm.
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science.jrank.org/pages/6566/Subsidence.html
science.jrank.org/pages/6566/Subsidence.html
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Subsidence is defined as the downward movement of the bearing soil on which a building rests. There are many possible causes for a bearing soil to fail. It is possible for subsidence to occur progressively over a long period, to occur over a very short period and then stop, and other variations on this theme.
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www.expertexpert.com/subside.htm
www.expertexpert.com/subside.htm
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For the year 2100, the report assumes 35 cm of sea level rise and as much or more (in some places) subsidence affecting coastlines. ... And the Arctic polar ice coverage & thickness is rapidly trending downwards due to warming, which reduces albedo & causes further warming of ocean waters, causing more melting,
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blogs.chron.com/sciguy/archives/2008/04/post_27.html
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A special feature on the LiveIn Quarters Ltd 'Mini Suite'... ... Firstly not all cracks mean subsidence problems! There are lots of other causes. For instance cracks to plaster can be caused by vibrations from nearby construction work as in when building an extension to a house.
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www.themovechannel.com/sitefeatures/viewpoints/buyer8.a...
www.themovechannel.com/sitefeatures/viewpoints/buyer8.asp
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The approximate rate of subsidence has varied between 8 and 13 mm/yr; averaging close to 1.3 m/100 yrs, with sea level rise being about 0.30 m/100 yrs. The rate of coastal land loss has varied between a minimum figure of 65 km2 and a maximum of 306 km2 (in 2005).
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gsa.confex.com/gsa/2007AM/finalprogram/abstract_127185....
gsa.confex.com/gsa/2007AM/finalprogram/abstract_127185.htm
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To test the hypothesis that removal of pressurized fluids causes land subsidence, pumping and subsidence data can be plotted versus time. Example: Santa Clara Valley, California;
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www.uwsp.edu/geo/faculty/ozsvath/lectures/Deep%20Subsid...
www.uwsp.edu/geo/faculty/ozsvath/lectures/Deep%20Subsidence.htm
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