Flush with rain, California plans to replenish drought-depleted groundwater with floodwaters

the annual supply for the city of Los Angeles. Some of the water will also be routed to wildlife refuges along the San Joaquin River starting next week, officials said.

The plan is intended to address potential flood risks, capitalize on California’s near-record snowpack and capture some of the high flows from the latest extreme storms to store water underground.

“We are taking steps to maximize groundwater recharge in a way that the state of California has never really done before,” said Erik Ekdahl, deputy director of the State Water Board’s water rights division. “This is an immense opportunity to help recharge these depleted aquifers.”

State officials said their order allows the Bureau of Reclamation to manage flood flows from Friant Dam and change points where water is diverted along the San Joaquin River.

Where water sinks into the ground and replenishes the aquifer, it could help address declines in water levels that have left families with dry wells in rural areas across the Central Valley. Stabilizing water levels could also help alleviate the widespread problem of collapsing ground triggered by overpumping, which has caused costly damage to canals and other infrastructure.

Gov. Gavin Newsom said after the three driest years in state history, “California is taking decisive action to capture and store water for when dry conditions return.”

Newsom has sought to prioritize capturing stormwater and recharging groundwater as central pieces of his administration’s strategy for adapting to more intense water extremes with climate change. On Friday, the governor’s office announced that he had signed an executive order enabling the capture of water from the latest round of storms.

The Bureau of Reclamation manages the dams, reservoirs and canals of the Central Valley Project and sends water to contractors including large agricultural irrigation districts and other agencies. The state order allows the federal government to deliver floodwater from the Mendota Pool, a small reservoir on the San Joaquin River, to be used for replenishing groundwater.

The water, which would otherwise have flowed down the San Joaquin River, will be available for irrigation districts and other agencies to divert for replenishing groundwater for more than four months. Under temporary contracts with the federal government, they will be able to send water through canals to areas with permeable soils that allow for groundwater recharge.

See 'Groundwater' Page 7