Watch our series of short videos on the importance of the
Sacramento-San Joaquin Delta, how it works as a water hub for
California and the challenges it is facing.
When a person opens a spigot to draw a glass of water, he or she
may be tapping a source close to home or hundreds of miles away.
Water gets to taps via a complex web of aqueducts, canals and
groundwater.
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Unlike California’s majestic rivers and massive dams and
conveyance systems, groundwater is out of sight and underground,
though no less plentiful. The state’s enormous cache of
underground water is a great natural resource and has contributed
to the state becoming the nation’s top agricultural producer and
leader in high-tech industries.
A new era of groundwater management began in 2014 in California
with the Sustainable Groundwater Management Act. The landmark law
turned 10 in 2024, with many challenges still ahead.
In December 2012, dam operators at Northern California’s Lake Mendocino watched as a series of intense winter storms bore down on them. The dam there is run by the U.S. Army Corps of Engineers’ San Francisco District, whose primary responsibility in the Russian River watershed is flood control. To make room in the reservoir for the expected deluge, the Army Corps released some 25,000 acre-feet of water downstream — enough to supply nearly 90,000 families for a year.
Registration is now open for
the Water Education Foundation’s 41ˢᵗ annual
Water Summitfeaturing leading
policymakers and experts in conversation about the latest
information and insights on water in California and the West.
A year of average precipitation gave California’s groundwater
supplies a significant boost, according to a state analysis
released Tuesday. California’s aquifers gained an estimated 2.2
million acre-feet of groundwater in the 12 months that ended
Sept. 30, the state’s 2024 water year. That’s about half the
storage capacity of Shasta Lake, California’s largest
reservoir. State officials said local agencies reported that
about 1.9 million acre-feet of water went underground as a
result of managed aquifer recharge projects designed to capture
stormwater and replenish groundwater. … Gov. Gavin
Newsom said California is collecting more groundwater data than
it has previously, and is continuing to prioritize efforts to
recharge aquifers. He said, however, that the state’s water
infrastructure is unprepared for the effects of climate change,
and he reiterated his support for building a water tunnel
beneath the Sacramento-San Joaquin River Delta.
There’s a break in the clouds that have hovered over Colorado
River negotiations for more than a year. State water leaders
appear to be coalescing behind a new proposal for sharing the
river after talks were stuck in a deadlock for more than a
year. The river is used by nearly 40 million people across
seven states and Mexico, but it’s shrinking due to climate
change. As a result, state leaders need to rein in demand.
For months, they were mired in a standoff about how
to interpret a century-old legal agreement. The new proposal is
completely different. Instead of those states leaning on old
rules that don’t account for climate change, they’re proposing
a new system that divides the river based on how much water is
in it today. … The new plan says the amount should be
based on a three-year rolling average of the “natural flows” in
the river — basically, how much water would flow through it if
human dams and diversion weren’t in the way.
… On June 11, the California Energy Commission officially
approved the Darden Clean Energy Project, a sprawling solar
farm and battery storage facility proposed for a stretch of
fallow farmland in western Fresno County. Darden is the first
project approved under a new fast-track permitting program,
which gave the commission just 270 days to finish its
environmental review. …The land for the project, near Cantua
Creek, was once a productive site for agriculture. But droughts
and decades of farming have left the 9,500-acre area with dry
and alkaline soil. The Westlands Water District
currently owns the land and is shutting down irrigation on
it and other swaths of former farmland, aiming to
conserve water for areas with better dirt.
The United States Department of Agriculture on Monday announced
that it will rescind a decades-old rule that protects 58.5
million acres of national forestland from road construction and
timber harvesting. The USDA, which oversees the U.S. Forest
Service, said it will eliminate the 2001 “Roadless Rule” which
established lasting protection for specific wilderness areas
within the nation’s national forests. Research has found that
building roads can fragment habitats, disrupt ecosystems, and
increase erosion and sediment pollution in drinking
water, among other potentially harmful outcomes. In a
statement, USDA Secretary Brooke Rollins described the rule —
which applies to about 30% of national forestland — as outdated
and overly restrictive. … More than 40 states are home
to areas protected by the rule. In California, that encompasses
about 4.4 million acres across 21 national forests, including
the Angeles, Tahoe, Inyo, Shasta-Trinity and Los Padres
national forests.
Operated by the U.S. Army Corps of Engineers, the
Bay Model is a giant hydraulic replica of San Francisco
Bay and the Sacramento-San Joaquin
Delta. It is housed in a converted World II-era
warehouse in Sausalito near San Francisco.
Hundreds of gallons of water are pumped through the
three-dimensional, 1.5-acre model to simulate a tidal ebb
and flow lasting 14 minutes.
As part of the historic Colorado
River Delta, the Salton Sea regularly filled and dried for
thousands of years due to its elevation of 237 feet below
sea level.
The most recent version of the Salton Sea was formed in 1905 when
the Colorado River broke
through a series of dikes and flooded the seabed for two years,
creating California’s largest inland body of water. The
Salton Sea, which is saltier than the Pacific Ocean, includes 130
miles of shoreline and is larger than Lake Tahoe.
Drought—an extended period of
limited or no precipitation—is a fact of life in California and
the West, with water resources following boom-and-bust patterns.
During California’s 2012–2016 drought, much of the state
experienced severe drought conditions: significantly less
precipitation and snowpack, reduced streamflow and higher
temperatures. Those same conditions reappeared early in 2021
prompting Gov. Gavin Newsom in May to declare drought emergencies
in watersheds across 41 counties in California.
