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DWR: California's groundwater storage increases for the first time since 2019

DWR: California's groundwater storage increases for the first time since 2019
IT’S CURRENTLY AT A 89% CAPACITY. CITY AND THE DEPARTMENT OF WATER RESOURCES ALSO SHARED SOME ENCOURAGING NEWS ABOUT THE STATE’S GROUNDWATER STORAGE. YEAH, OUR METEOROLOGIST HEATHER WALDMAN JOINS US NOW WITH THOSE NUMBERS. YEAH. AND REMEMBER, GROUNDWATER IS SUPPOSED TO ACT LIKE AN EMERGENCY SAVINGS ACCOUNT PROVIDING WATER WHEN THE STATE’S RESERVOIRS ARE LOW. HISTORICALLY, THOUGH, GROUNDWATER HAS BEEN OVERUSED, ESPECIALLY IN THE CENTRAL VALLEY LAST YEAR’S HUGE RAIN AND SNOW SEASON COMBINED WITH NEW REGULATIONS FOR GROUNDWATER USE, HAVE LED TO THE FIRST INCREASE IN THE STATE’S GROUNDWATER SINCE 2019, THE DEPARTMENT OF WATER RESOURCES SAYS THAT 4.1 MILLION ACRE FEET OF WATER WAS STORED UNDER GROUND, USING SOME SORT OF INTENTIONAL RECHARGE METHOD. THAT’S ABOUT THE CAPACITY OF LAKE SHASTA, BUT IN TOTAL, BETWEEN THE MANAGED RECHARGED AND NATURAL GROUNDWATER RECHARGING, THE STATE’S GROUNDWATER STORAGE INCREASED BY 8.7 MILLION ACRE FEET. SOME OF THAT INCREASE AGAIN COMES FROM NOT NEEDING TO PUMP WATER TO THE SURFACE. THANKS TO TWO RELATIVELY WET YEARS IN A ROW. WHILE THIS INCREASE IS GOOD NEWS AND IT SHOWS THAT BETTER MANAGING GROUNDWATER USE CAN BE EFFECTIVE IN WET YEARS, THERE IS STILL A LONG WAY TO GO TO RESTORING CALIFORNIA’S AQUIFERS. DWR ESTIMATES THAT THERE IS A 40 MILLION ACRE FEET DEFICIT THAT IS BUILT UP OVER THE LAST TWO DECADES. THE SUSTAINABLE GROUNDWATER MANAGEMENT ACT, WHICH TOOK EFFECT TEN YEARS AGO, AIMS TO REPLENISH GROUNDWATER SUPPLY WHILE BUILDING WATER PLANS THAT RELY LESS ON THAT SOURCE IN THE FUTURE. THIS IS THE FIRST GROUNDWATER UPDATE THAT INCLUDES ANNUAL REPORT DATA FROM 99 DIFFERENT BASINS ACROSS THE STATE.
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DWR: California's groundwater storage increases for the first time since 2019
California's groundwater storage has increased for the first time since 2019. According to data released by the Department of Water Resources, groundwater aquifer storage increased by 8.7 million acre-feet following 2023's huge rain and snow season. About 4.1 million acre-feet of that increase came from managed aquifer recharge programs, where excess surface water is intentionally pumped underground. For comparison, Lake Shasta has a total capacity of about 4.5 million acre-feet.DWR credits an abundant surface water supply and more carefully managed groundwater use for last year's growth. California's massive underground aquifers can be considered as an emergency savings account for the state's water needs. Following dry winters when reservoirs are low, groundwater can be pumped to the surface to meet demand. Historically, the state's groundwater storage has been severely over drafted. The Sustainable Groundwater Management Act, signed into law ten years ago, aims to reduce over pumping in the future while simultaneously restoring the aquifers.While this update holds promise for the future of managing groundwater, DWR says it also illustrates just how much further there is to go. The agency estimates that there is a 40 million acre feet groundwater deficit that has built up over the past two decades. Five consecutive above average rain and snow seasons would be needed to make up that deficit.

California's groundwater storage has increased for the first time since 2019.

According to data released by the Department of Water Resources, groundwater aquifer storage increased by 8.7 million acre-feet following 2023's huge rain and snow season.

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About 4.1 million acre-feet of that increase came from managed aquifer recharge programs, where excess surface water is intentionally pumped underground. For comparison, Lake Shasta has a total capacity of about 4.5 million acre-feet.

DWR credits an abundant surface water supply and more carefully managed groundwater use for last year's growth.

California's massive underground aquifers can be considered as an emergency savings account for the state's water needs. Following dry winters when reservoirs are low, groundwater can be pumped to the surface to meet demand.

Historically, the state's groundwater storage has been severely over drafted. The Sustainable Groundwater Management Act, signed into law ten years ago, aims to reduce over pumping in the future while simultaneously restoring the aquifers.

While this update holds promise for the future of managing groundwater, DWR says it also illustrates just how much further there is to go.

The agency estimates that there is a 40 million acre feet groundwater deficit that has built up over the past two decades. Five consecutive above average rain and snow seasons would be needed to make up that deficit.