User:Marisol Barraza/sandbox

Groundwater and Aquafers
How they are used in relation to compaction of land and water relationship.https://www.usgs.gov/centers/land-subsidence-in-california/science/extensometers-and-compaction#overview

How they are used to measure subsidence along the California aqueducts.https://www.usgs.gov/publications/land-subsidence-along-california-aqueduct-west-central-san-joaquin-valley-california

how they are used in measuring water availability and land subsidence.https://www.usgs.gov/publications/water-availability-and-land-subsidence-central-valley-california-usa

Groundwater availability in central valley California. https://www.usgs.gov/publications/groundwater-availability-central-valley-aquifer-california

An in depth article on extensometers and water level from 1987-1993 : https://pubs.usgs.gov/of/1998/0631/report.pdf