A study published on Wednesday reveals a significant and accelerated decline in global groundwater levels over the last four decades.
The decline is attributed to unsustainable irrigation practices and climate change.
Groundwater, crucial for farms, households, and industries, faces depletion, posing serious economic and environmental risks.
This includes reduced crop yields and potential land subsidence, especially in coastal regions, as outlined in Nature, a scientific journal.
Scott Jasechko from the University of California, Santa Barbara, one of the paper’s co-authors said, “One of the most likely major driving forces behind rapid and accelerating groundwater decline is the excessive withdrawal of groundwater for irrigated agriculture in dry climates.”
The study observed that over one-third of the 1,693 monitored aquifer systems, which are porous rock or sediment bodies holding groundwater, experienced an annual decline of at least 0.1 m (3.94 inches) from 2000 to 2022.
Additionally, 12% of these systems saw yearly declines exceeding 0.5 m.
Particularly impacted aquifers in Spain, Iran, China, and the United States witnessed declines exceeding 2 m per year during the mentioned period.