"Climate change may be creating a groundwater "time bomb" as the world's underground water systems catch up to the impacts of global warming.
Researchers for a study published Monday in the journal Nature Climate Change say more than half of the world’s groundwater systems — the largest source of usable freshwater in the world — could take more than 100 years to completely respond to current environmental changes from global warming.
Groundwater is replenished primarily by rainfall through a process known as recharge. Concurrently, water exits or discharges from groundwater sources into lakes, streams and oceans to maintain an overall balance.
When there is a change in recharge due to a lack of rainfall, for example, levels of groundwater drop until balance is restored. "
Pam Wright reports for the Weather Channel January 23, 2019.
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