Industrial and domestic demand for water will likely grow much faster than agricultural demand, although agriculture will remain the largest overall user.
According with the IWA World Water Development Report 2018, the global water use has increased by a factor of six over the past 100 years and continues to grow steadily at a rate of about 1% per year. Water use is expected to continue increasing at the global level, as a function of population growth (the world population is expected to increase from 7.7 billion in 2017 to between 9.4 and 10.2 billion by 2050) , economic development and changing consumption patterns, among other factors.
Global water demand has been estimated at about 4,600 km3 per year and projected to increase by 20%–30% to between 5,500 and 6,000 km3 per year by 2050. for the ‘first time in world history’ absolute growth in non-agricultural demand for water will exceed growth in agricultural demand, resulting in a fall in agriculture’s share of total water consumption in developing countries from 86% in 1995 to 76% in 2025. These projections highlight the importance of addressing water challenges facing agriculture where agricultural demand for water, and competition for it, are both set to increase. The agricultural development options adopted will be the most critical factor in determining the future for water security in agriculture and other sectors.
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