Measuring Land Subsidence in California
Collecting Data Above and Below Ground
Evaluation of Groundwater Conditions and Land Subsidence
Land Subsidence in California
Land subsidence is a gradual settling or sudden sinking of the Earth's surface due to subsurface movement of earth materials. The main cause of subsidence in California is groundwater pumping. The effects of subsidence include damage to buildings and infrastructure, increased flood risk in low-lying areas, and lasting damage to groundwater aquifers and aquatic ecosystems.