NASA measures underground water flowing from Sierra to Central Valley – phys.org
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NASA measures underground water flowing from Sierra to Central Valley – phys.org
In a recent study, scientists found that a previously unmeasured source—water percolating through soil and fractured rock below California’s Sierra Nevada mountains—delivers an average of 4 million acre-feet of water to the state’s Central Valley each year. It accounts for about 10% of all the water that enters this highly productive farmland annually.