Fig. 2: Quality-included water scarcity (WScom) across river basins on an annual basis.

a The third-order basin level (n = 209). b The second-order basin level (n = 76). c The first-order basin level (n = 10). Maps of WScom at other time scales for these three basin levels are shown in Supplementary Figs. 3–5. Source data are provided as a Source Data file.