Project description: The aim of this project is to develop a groundwater numerical model using groundwater depletion from GRACE, land subsidence from InSAR, and in situ hydrologic data from U.S. Geological Survey (USGS) and California Department Water Resources (CA-DWR). The model, calibrated to GRACE groundwater anomalies and InSAR-measured patterns of surface deformation, will be able to better simulate the spatial and temporal dynamics of land subsidence induced from groundwater depletion within the Central Valley of California. The project is being conducted in close partnership with USGS and CA-DWR and the final calibrated model will be able to assist CA-DWR in sustainable groundwater management across the Central Valley in compliance with California’s Sustainable Groundwater Management Act (2014).


End user/Partners: U.S. Geological Survey (USGS), California Department of Water Resources (CA-DWR)


Data sources, models, technology: NASA GRACE and GRACE-FO, European Space Agency Sentinel 1 Interferometric Synthetic-Aperture Radar (InSAR), USGS Central Valley Hydrologic Model (CVHM) 1 and 2.