subsidence, a big problem everywhere
Posted by cypresstx on 4/5/2016, 1:13 pm
water - the new gold

http://water.usgs.gov/edu/earthgwlandsubside.html

Compaction of soils in some aquifer systems can accompany excessive groundwater pumping and it is by far the single largest cause of subsidence. Excessive pumping of such aquifer systems has resulted in permanent subsidence and related ground failures. In some systems, when large amounts of water are pumped, the subsoil compacts, thus reducing in size and number the open pore spaces in the soil the previously held water. This can result in a permanent reduction in the total storage capacity of the aquifer system.


Map of the U.S. showing some of the areas where subsidence has been attributed to the compaction of aquifer systems caused by groundwater pumpage. From "Land Subsidence in the United States", USGS Fact Sheet-165-00, December 2000.


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Blog on California's Water Supply by Bob Henson - Chris in Tampa, 4/5/2016, 5:38 am
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