Due to overexploitation groundwater water supplies worldwide are being depleted at a faster pace than can be recovered, warn scientists from Canada and the Netherlands.
Scientists from McGill University in Montreal and Utrecht have developed computer models of global groundwater resources with which compared the operation and recovery.
Tom Gleeson from the University of McGill, who led the research, notes that about 99% of freshwater supplies in the world who are not in the form of ice, are underground. The scientist says that these peculiar water tanks will be crucial for the growing population of the Earth, long to be managed properly.
The survey results indicate, however, that 80% of aquifers in the world are used incorrectly, and in several regions has been established and over-exploitation. The exposed regions are Western Mexico, Central California, Saudi Arabia, Iran, northern India and parts of North China.
Statistics show that 1.7 billion people, mostly in Asia, live in areas where groundwater reserves and ecosystems that rely on these stocks are at risk.
Tom Gleeson said that underground supplies of water are vital to agriculture. He stresses that these are resources that need better management.
According to the teachings problems can be solved by introducing a constraint on the extraction of water from aquifers and improving the efficiency of irrigation.
British researchers also published a few months ago a scientific report on underground reserves of water. They located the enormous amounts of water in large areas in Africa that could serve as a buffer against climate change, if used sustainably, news agency notes.
British scientists have found that the volume of groundwater reserves in Africa amounted to about 100 times the size of the continent, and some of the largest reservoirs are in Libya, Algeria, Egypt and Sudan.