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Ag field being irrigated through sprinklers with a big truck in the background

On average, California allocates more than five times the amount of water to users than is available in its rivers and streams. (Josh Viers/UC Merced photo)

More rights than water

California has allocated five times more surface water than the state actually has, making it hard for regulators to tell whose supplies should be cut during a drought, University of California researchers reported.

The scientists said California’s water-rights regulator, the State Water Resources Control Board, needs a systematic overhaul of policies and procedures to bridge the gaping disparity, but lacks the legislative authority and funding to do so.

Ted Grantham, who explored the state’s water-rights database as a postdoctoral researcher with the UC Davis Center for Watershed Sciences, said the time is ripe for tightening the water-use accounting.

“Given the public’s current attention on drought and California water, we now have an unprecedented opportunity for strengthening the water-rights system,” said Grantham, who conducted the analysis with UC Merced Professor Joshua Viers.

[more on water rights…]


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