Fig. 1 Quarterly averaged monthly blue water scarcity at 30 × 30 arc min resolution. Water scarcity at the grid cell level is defined as the ratio of the blue water footprint within the grid cell to the sum of the blue water generated within the cell and the blue water inflow from upstream cells. Period: 1996–2005.
- Table 1 Number of people facing low, moderate, significant, and severe water scarcity during a given number of months per year, for the average year in the period 1996–2005.
Number of
months per
year (n)Billions of people facing low, moderate, significant, and
severe water scarcity during n months per yearBillions of people
facing moderate or
worse water scarcity
during at least n months
per yearBillions of people
facing severe
water scarcity
during at least n
months per yearLow
water
scarcityModerate
water
scarcitySignificant
water
scarcitySevere water
scarcity0 0.54 4.98 5.22 2.07 6.04 6.04 1 0.12 0.81 0.66 0.31 4.26 3.97 2 0.12 0.19 0.13 0.37 3.95 3.66 3 0.35 0.05 0.03 0.37 3.55 3.28 4 0.33 0.01 0.001 0.59 3.15 2.91 5 0.30 0 0 0.55 2.56 2.32 6 0.33 0 0 0.27 2.09 1.78 7 0.47 0 0 0.21 1.76 1.50 8 0.59 0 0 0.29 1.46 1.30 9 0.40 0 0 0.30 1.13 1.01 10 0.40 0 0 0.12 0.78 0.71 11 0.30 0 0 0.09 0.66 0.59 12 1.78 0 0 0.50 0.54 0.50 Total 6.04 6.04 6.04 6.04
Supplementary Materials
Supplementary material for this article is available at http://advances.sciencemag.org/cgi/content/full/2/2/e1500323/DC1
Supplementary Discussion
Fig. S1. Average monthly blue water scarcity at a spatial resolution of 30 × 30 arc min.
Table S1. Comparison of results between the current study and previous studies.
Additional Files
Supplementary Materials
This PDF file includes:
- Supplementary Discussion
- Fig. S1. Average monthly blue water scarcity at a spatial resolution of 30 × 30 arc min.
- Table S1. Comparison of results between the current study and previous studies.
Files in this Data Supplement:
