MIT researchers have simulated, using the new software, future flow and water demand, and it seems that quite soon there will not be enough water for the half of the world population (Source: http://newsoffice.mit.edu/2014/predicting-the-future-of-global-water-stress).
According to the researchers, 5 billion (52 %) of the projected 9.7 billion people in the world will experience a shortage in water-stressed areas by 2050.
The researchers also expect that another 1 billion of people will live in areas where demand for water exceeds supply. Most of these regions are already facing water scarcity - especially in India, North Africa and the Middle East.
Climate change will play a big role in this, particularly in developing countries, which are more vulnerable. "Our research highlights the substantial influence of socioeconomic growth on global water resources, potentially worsened by climate change," says Adam Schlosser, deputy director of research at the Joint Global Change Program and lead author of the study. "Developing nations are expected to face the brunt of these rising water demands, with 80 % of this additional 1.8 billion living in developing countries."