Subsidence is a huge issue associated associated with aquifer depletion. http://geochange.er.usgs.gov/sw/changes/anthropogenic/subside/ http://geochange.er.usgs

Subsidence is a huge issue associated associated with aquifer depletion. http://geochange.er.usgs.gov/sw/changes/anthropogenic/subside/ http://geochange.er.usgs.gov/sw/changes/anthropogenic/subsid... http://geochange.er.usgs.gov/sw/changes/anthropogenic/subside/ http://geochange.er.usgs.gov/sw/changes/anthropogenic/subsid... That fact alone tells you a lot. Some formations are more resilient; these tend to experience less subsidence. In systematic terms, sticky bag vs rigid tank.