Extended Data Fig. 8: Inter-scale model comparison.
From: Environmental flow limits to global groundwater pumping
a, b, Comparison of groundwater head declines (a) and groundwater discharge (GD; b) at different spatial levels, simulated by a calibrated regional-scale model (‘calb.’); results modified from previous work41 using the Republican River Groundwater Model39 and the global-scale surface water–groundwater model (‘glob.’). c, The full basin covers the entire Republican River basin, which is situated in the central-north of the High Plains aquifer, USA. The larger sub-basins are the level 2 and 3 regional basins that consist of more level 1 basins. In b, the solid lines present the simulated groundwater discharge, the dashed lines present the trends of the groundwater discharge. Groundwater discharge trends simulated by both models are comparable.
