The scientists say the issue of pollution also now needs to be considered alongside the oft-discussed concern over the sustainable use of groundwater. The deeply buried ancient water is what it is because of the time taken to build up, and hydrologists have long warned that it should really be viewed as a kind of "credit card", to be drawn on principally only in periods of major water stress, such as during a severe drought.
This case will continue to be made, but the new study now adds in the extra matter of contamination risk. This video can not be played To play this video you need to enable JavaScript in your browser. Jim Kirchner: "Fossil groundwater fell as rain when mastodons still roamed the Earth". Image source, Richard Taylor. We will become increasingly dependent on deeper, older groundwater if shallower, younger groundwater becomes depleted.
A deep, handpump well supplying freshwater in the Sundarbans of coastal Bangladesh. For instance, Libya has relied on fossil water for decades which is now dwindling. Lake Vostok is the largest subglacial lake in Antarctica residing approximately 4, m below the surface of the East Antarctic Ice Sheet. It is thought that the water has been isolated for approximately 15 to 25 million years leading to the hypothesis that the lake could be a fossil reserve containing unusual lifeforms not seen in millennia.
It is thought to have the oldest lake water in the world with retention time of the water being 13, years. The Ogallala aquifer sits under , square miles of 8 states of the US and is one of the largest freshwater deposits in the world.
The underground water is estimated to have been deposited during the humid time which followed the last glacial maximum.
The aquifer is a major source of water for those living above it. The waters in the aquifer is estimated to have been deposited 4,, years ago.
The fossil water is of great significance to the people living in the four countries with demand increasing in modern time. Lake Vostok residing about 4, m below the Antarctic surface.
John Misachi August 17 in World Facts. Particularly old groundwater is called fossil water. Aquifer drawdown or overdrafting and the pumping of fossil water may be a contributing factor to sea-level rise. As fossil water is a non-renewable resource, over the six centuries of the Garamantian kingdom, the ground water level fell. For example : aquifer drawdown or overdrafting and the pumping of fossil water may be a contributing factor to sea-level rise. It's difficult to see fossil water in a sentence.
The rest is so-called " fossil water , " locked in glaciers and the permanent ice shield that covers the far north. Virtually all of the water at Ash Meadows is fossil water , believed to have entered the ground water system tens of thousands of years ago.
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