Blog: USGS scientists explain how aquifer compaction is measured
A recent tour of California’s Central Valley given by the nonprofit organization Water Education Foundation included a stop at the USGS California Water Science Center’s extensometer near Porterville. Tour participants, made up of water industry professionals, were met by USGS groundwater scientists Michelle Sneed and Justin Brandt who showed the extensometer to the group. The extensometer is one of several that dot the Central Valley. Extensometers measure compaction and expansion of an aquifer system, providing depth-specific data that can help scientists better understand the rate, extent, and at what depths in the system land subsidence is occurring.
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