Human activity is leading to the rapid draining of about one third of the planet’s largest underground water reserves and it is unclear how much fluid remains in them, two new studies have found. Consequently, huge sections of the population are using up groundwater without knowing when it will run out. "Given how quickly we are consuming the world’s groundwater reserves, we need a coordinated global effort to determine how much is left," said Jay Famiglietti a senior water scientist at NASA. Scientists used data from special NASA satellites to measure groundwater losses.
The Indus Basin aquifer of northwestern India and Pakistan is the second-most overstressed and the Murzuk-Djado Basin in northern Africa is third, scientists said.
"In a water-scarce society, we can no longer tolerate this level of uncertainty, especially since groundwater is disappearing so rapidly."