Fig. 4: Yearly cumulative groundwater losses in the Central Valley.
From: Groundwater depletion in California’s Central Valley accelerates during megadrought
Groundwater losses combining the USGS’s Central Valley Hydrologic Model (CVHM)13 and the GRACE/FO estimates since 1962. The black line represents the overall groundwater depletion from 1962 to 2021 calculated by combining the CVHM and GRACE estimates.
