Groundwater Pumping Changes Surface Levels in Phoenix

摘要

The ground level in portions of the Phoenix metro area is dropping at an annual rate of almost an inch a year (nearly two centimeters), according to two Arizona State University scientists. ASU research says this is caused by the pumping of groundwater from subsurface aquifers. Although changes of an inch or a few centimeters a year may not seem substantial, when they continue for many years and over long distances they can have serious and expensive impacts. Structures such as the Central Arizona Project and other canals, utility lines, water and gas mains, storm drains, and sewers are most affected. Office buildings, apartments, and homes can also become damaged as ground levels drop.