Extended Data Fig. 2: SI and DI.
From: Importance and vulnerability of the world’s water towers
a, The WTU SI (blue colourscale) and downstream DI (brown colourscale) for all 78 WTUs and WTU basins. b, Supply index (SI) and demand index (DI) for each WTU grouped per continent. Background colour gradient indicates water tower importance (that is, darker shades represent higher SI and DI values). Points are labelled with WTU IDs (see Extended Data Tables 1, 2, Extended Data Fig. 1).
