world water resources @UNEP


Few days ago tweet from @UN_water brought me to this link water statistic . It’s a good and easy to understand resources for people who willing to study much more about WATER. check it out

Water resources

The total volume of water on Earth is about 1.4 billion km3. The volume of freshwater resources is around 35 million km3, or about 2.5 percent of the total volume.

Source: United Nations Environment Programme (UNEP)

Of these freshwater resources, about 24 million km3 or 70 percent is in the form of ice and permanent snow cover in mountainous regions, the Antarctic and Arctic regions.
Source: UNEP

Around 30 percent of the world’s freshwater is stored underground in the form of groundwater (shallow and deep groundwater basins up to 2 000 metres, soil moisture, swamp water and permafrost). This constitutes about 97 percent of all the freshwater that is potentially available for human use.
Source: UNEP

Freshwater lakes and rivers contain an estimated 105 000 km3 or around 0.3 percent of the world’s freshwater.
Source: UNEP

The Earth’s atmosphere contains approximately 13,000 km3 of water.
Source: World Water Assessment Programme (WWAP)

The total usable freshwater supply for ecosystems and humans is about 200 000 km3 of water – less than 1 percent of all freshwater resources.
Source: UNEP

Water Use

Water use has been growing at more than the rate twice of population increase in the last century.
Source: Food and Agriculture Organization of the United Nations (FAO) and UN-Water

The world’s six billion people are appropriating 54 percent of all the accessible freshwater contained in rivers, lakes and underground aquifers.
Source: WWAP

145 nations have territory within a transboundary basin.
Source: WWAP

How the world uses freshwater:
• about 70 percent for irrigation
• about 22 percent for industry
• about 8 percent for domestic use
Source: World Water Assessment Programme (WWAP)

Water withdrawals are predicted to increase by 50 percent by 2025 in developing countries, and 18 per cent in developed countries.
Source: Global Environment Outlook: environment for development (GEO-4)

Over 1.4 billion people currently live in river basins where the use of water exceeds minimum recharge levels, leading to the desiccation of rivers and depletion of groundwater.
Source: Human Development Report 2006

In 60 percent of European cities with more than 100,000 people, groundwater is being used at a faster rate than it can be replenished.
Source: World Business Counicl For Sustainable Development (WBCSD)

By 2025, 1 800 million people will be living in countries or regions with absolute water scarcity, and two-thirds of the world population could be under stress conditions.
Source: FAO

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