Extensometer Data Used as Aquifer-System Compaction Observations for Model Calibration, Central Valley, California, 1958-2018
The Central Valley, and particularly the San Joaquin Valley, has a long history of land subsidence caused by groundwater development. The extensive withdrawal of groundwater from the unconsolidated deposits of the San Joaquin Valley lowered groundwater levels and caused widespread land subsidence—reaching 9 meters by …