Figure 4
From: Projecting groundwater storage changes in California’s Central Valley

The mean changes in groundwater storage simulated for both past and future years. Several management scenarios are examined for future years. The case of no changes in local or regional water management is shown with a red line. Each supply/demand variable’s sensitivity to groundwater depletion is examined by assessing 20% changes in each variable individually, indicated by blue for supply changes and by green for demand changes. Finally, a combined strategy that incorporates 20% changes in all variables simultaneously is implemented (i.e. 20% augmentation in Recycle and Reuse and in Surface Supplies as well as 20% reduction in Urban and Agricultural Demands), and shown with blue crosses.