Figure 2
From: Anthropogenic drought dominates groundwater depletion in Iran
Evolution in groundwater storage (ds/dt) and its corresponding natural and anthropogenic drivers during 2002–2015 at the country (right y-axis) and basin scales (left y-axis). SPI is Standard Precipitation Index; P − E is precipitation minus pan evaporation; R is recharge, Hout is human outflow, Hin is human inflow, R + Hin-ds/dt is the net outgoing flux and hout is the normalized human outflow. Country- and basin-wide dynamics in each variable are shown by solid lines and gray envelope, respectively (This figure is created using R).
