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This will probably ring Maud Barlow's bell, but it science has discovered vast undersea aquifers of fresh water, which can potentially be reached and exploited using the same technology that is used for deep water oil drilling. While wholescale pillage of these reserves is only going to be a short stopgap, we should remember that the real problem isn't that there is a shortage of fresh water, it is that the fresh water isn't where people are.
Personally, I think it will probably be far cheaper in the long term to import water conservation technologies from places like Israel (which has a GDP similar to California, but uses 1/5 of the water per capita), and turn wastewater treatment into "recycling". Even today I suspect that about 1/3 of the wastewater could be successfully returned into the civic water supply using current technology. Other ideas like introducing genetically engineered crops that require less input in the form of water and fertilizer, different agricultural practices that reduce inputs further and looking very carefully at industrial processes to reduce water usage will also have a much greater long term impact:
http://www.dailymail.co.uk/news/article-2519911/Vast-freshwater-reserves-discovered-ocean-floor-supply-future-generations.html
Personally, I think it will probably be far cheaper in the long term to import water conservation technologies from places like Israel (which has a GDP similar to California, but uses 1/5 of the water per capita), and turn wastewater treatment into "recycling". Even today I suspect that about 1/3 of the wastewater could be successfully returned into the civic water supply using current technology. Other ideas like introducing genetically engineered crops that require less input in the form of water and fertilizer, different agricultural practices that reduce inputs further and looking very carefully at industrial processes to reduce water usage will also have a much greater long term impact:
http://www.dailymail.co.uk/news/article-2519911/Vast-freshwater-reserves-discovered-ocean-floor-supply-future-generations.html
Vast freshwater reserves discovered under the ocean floor which could supply future generations
Researchers make discovery on continental shelves off Australia, China, North America and South Africa
Discovery comes as UN estimates suggest water use has been growing at more than double the rate of population over the last century
By WILLIAM TURVILL
PUBLISHED: 17:54 GMT, 7 December 2013 | UPDATED: 23:34 GMT, 7 December 2013
Vast freshwater reserves have been discovered under the ocean floor which scientists believe could sustain future generations.
Australian researchers claim to have found 500,000 cubic kilometres (120,000 cubic miles) of freshwater buried beneath the seabed on continental shelves off Australia, China, North America and South Africa.
The discovery comes as United Nations estimates suggest water use has been growing at more than twice the rate of the population of the world over the last century.
Australian researchers have discovered vast freshwater reserves beneath the seabed on continental shelves
Lead author Vincent Post, from Flinders University, said: ‘The volume of this water resource is a hundred times greater than the amount we've extracted from the Earth's sub-surface in the past century since 1900.
‘Freshwater on our planet is increasingly under stress and strain so the discovery of significant new stores off the coast is very exciting.
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‘It means that more options can be considered to help reduce the impact of droughts and continental water shortages.’
According to UN Water estimates, water use has been growing at more than twice the rate of population in the last century due to demands such as irrigated agriculture and meat production.
More than 40 per cent of the world's population already live in conditions of water scarcity. By 2030, UN Water estimates that 47 per cent of people will exist under high water stress.
Scientists hope the discovery will help reduce the impact of droughts and continental water shortages
Mr Post said his team's findings were drawn from a review of seafloor water studies done for scientific or oil and gas exploration purposes.
‘By combining all this information we've demonstrated that the freshwater below the seafloor is a common finding, and not some anomaly that only occurs under very special circumstances,’ he said.
The deposits were formed over hundreds of thousands of years in the past, when the sea level was much lower and areas now under the ocean were exposed to rainfall which was absorbed into the underlying water table.
When the polar icecaps started melting about 20,000 years ago these coastlines disappeared under water, but their aquifers remain intact - protected by layers of clay and sediment.
Post said the deposits were comparable with the bore basins currently relied upon by much of the world for drinking water and would cost much less than seawater to desalinate.
Drilling for the water would be expensive, and Post said great care would have to be taken not to contaminate the aquifers.
He warned that they were a precious resource.
‘We should use them carefully: once gone, they won't be replenished until the sea level drops again, which is not likely to happen for a very long time,’ Mr Post said.