Fig. 8: Unsustainable blue water demand by sub-basin.

Maps show the unsustainable blue water demand for the period 1980–1984 and 2011–2015 in China (a, b), India (d, e), and the United States (g, h). c, f, i show the change in unsustainable blue water demand; positive values indicate that unsustainable blue water demand worsened between the periods 1980–1984 and 2011–2015. Negative values indicate an improvement in unsustainable blue water demand. Following Brauman et al. ⁸, the analysis did not consider sub-basins smaller than 1000 km² (shown in white).