California’s climate, characterized by warm, dry summers and mild
winters, makes the state’s water supply unpredictable. For
instance, runoff and precipitation in California can be quite
variable. The northwestern part of the state can receive more
than 140 inches per year while the inland deserts bordering
Mexico can receive less than 4 inches.
By the Numbers:
Precipitation averages about 193 million acre-feet per year.
In a normal precipitation year, about half of the state’s
available surface water – 35 million acre-feet – is collected in
local, state and federal reservoirs.
California is home to more than 1,300 reservoirs.
About two-thirds of annual runoff evaporates, percolates into
the ground or is absorbed by plants, leaving about 71 million
acre-feet in average annual runoff.
Southern California cities can expect to receive 50% of their
full water allotments this year from the aqueducts of the State
Water Project, up from 40% last month, as runoff from this
year’s ample snowpack continues to fill reservoirs in Northern
California. … Lake Oroville, the largest reservoir that feeds
the State Water Project, is now 95% full and is expected to
continue rising as snowmelt runs off the Sierra Nevada. The
state Department of Water Resources said the reservoir could
reach full capacity this spring for a third straight year. The
state’s snowpack in the Sierra reached exactly 100% of average
for the season April 4, the department said.
The Federal Bureau of Reclamation is increasing the amount of
water available for Fresno County farmers through the Central
Valley Project dam and canal system. On Monday, the bureau said
it would boost the allocation for south-of-Delta water users,
including the Westlands Water District, to 50%, up from the 40%
announced in March. Acting California-Great Basin Regional
Director Adam Nickels said the increased allocation abides with
President Donald Trump’s executive order increasing water for
Central Valley farmers.
As part of a science mission tracking one of Earth’s most
precious resources – water – NASA’s C-20A aircraft conducted a
series of seven research flights in March that can help
researchers track the process and timeline as snow melts and
transforms into a freshwater resource. The agency’s Uninhabited
Aerial Vehicle Synthetic Aperture Radar (UAVSAR) installed on
the aircraft collected measurements of seasonal snow cover and
estimate the freshwater contained in it. … The Dense UAVSAR
Snow Time (DUST) mission mapped snow accumulation over the
Sierra Nevada mountains in California and the Rocky Mountains
in Idaho. Mission scientists can use these observations to
estimate the amount of water stored in that snow.
Coast Guard rescue missions failing after running into
unexpected currents. Surprise atmospheric river storms flooding
downtown San Francisco. Seafood contaminated by unseen algal
blooms. California scientists fear these scenarios, and more,
are possible under the Trump administration’s recommendation to
reduce the National Oceanic and Atmospheric Administration’s
budget by $1.7 billion. Several scientific programs in
California are slated for significant reductions or elimination
if the budget proposal is pushed through Congress. Scientists
say the cuts would hamper weather forecasting, disrupt critical
ocean data collection and decimate climate research.
The Sites Project Authority revealed that the Sites Reservoir
could have captured more than 550,000 acre-feet of water from
late November 2024 through early April 2025. According to
officials, this amount of water capture could have benefited
more than three million people. Fritz Durst, Chair of the Sites
Project Authority Board of Directors, emphasized the
reservoir’s potential. “Once again, we’re seeing how well Sites
Reservoir would perform during wet periods if it were
operational today, by capturing and storing water for drier
periods,” Durst said. The analysis showed that the reservoir is
designed to capture and store water during wet periods. It aims
to increase water flexibility, reliability, and resiliency
during drier times. In February 2025 alone, Sites could have
diverted over 150,000 acre-feet of water. These diversions
would add to the 850,000 acre-feet captured last season, nearly
reaching the reservoir’s full capacity.
… According to data from the Scripps Institution of
Oceanography, 56 atmospheric rivers impacted the western U.S.
during late 2024 and early 2025, with the majority affecting
Oregon and Northern California. … Forecasters note that
Northern California typically experiences about six strong
atmospheric rivers every year, but by April 1, that number
had already reached nine. This increase in storm system
intensity and frequency led to above-normal precipitation
levels, particularly in critical watershed zones, but, in
contrast, Southern California saw very few significant storms,
receiving only a handful of weak systems. As a result,
precipitation totals in Southern California dropped to 70% or
less of average levels through early March, setting the stage
for an increasingly dangerous fire season.
Earth’s landmasses are holding onto a lot less water than they
used to — and this loss is not just due to melting ice sheets.
Terrestrial water storage, which includes water in underground
aquifers, lakes, rivers and the tiny pore spaces within soil,
declined by trillions of metric tons in the early 21st century,
researchers report in the March 28 Science. This sharp decrease
in freshwater stores is driven by rising temperatures on land
and in the oceans, which in turn are linked to an increased
global incidence of drought. And given the projected warming of
the planet, this trend isn’t likely to change any time soon,
say geophysicist Ki-Weon Seo of Seoul National University and
colleagues.
Last October, an invasive species never before seen in
North America was discovered in the deep waters of the
Port of Stockton, about 92 miles east of San Francisco. No
larger than the size of a paperclip, the seemingly innocuous,
caramel-colored shells of golden mussels clinging to buoys and
monitoring equipment in the Sacramento-San Joaquin Delta — and
subsequently found at O’Neill Forebay in the San Luis Reservoir
near Los Banos — have left California officials scrambling to
stop the spread. On Wednesday, the California Department
of Fish and Wildlife released its plan to address
what it’s calling an “urgent invasive species threat,” with
strategies to prevent further distribution of golden mussels
and to minimize their impact on the environment, recreation,
agriculture and, notably, drinking water infrastructure.
At least one more dose of winter is headed to Utah’s mountains
while the state’s snowpack melts. After previously issuing a
winter storm watch, the National Weather Service issued a
winter weather advisory for Utah’s central and southern ranges,
which could receive up to a foot of snow at its highest points
by Friday night, as an incoming storm will likely impact those
regions the most. Still, other mountain ranges in the state
could pick up decent totals over the next few days. “(It’ll be)
a good dose of water for our state,” said KSL meteorologist
Matt Johnson.
It may feel like it rained a lot last year – and it did – but
not enough to satisfy L.A. County’s critical shortage of
rainfall, officials say. A news release issued Tuesday by Water
for L.A. County indicates that the county captured nearly 12
billion gallons of stormwater over the past several months.
Tuesday was the last official day of the storm season, which
begins on Oct. 15 every year. But the 11.9 billion gallons
of stormwater received are still not enough. … A “stark
contrast” provided by officials was the fact that the 2023-24
storm season brought 21.2 billion gallons of stormwater to the
region, which was enough to meet the water needs of 2.9 million
people for an entire year, officials explained. The drop in
rainfall highlights L.A. County’s water management challenges
that are exacerbated by persistent drought conditions; thus,
local legislators are looking to improve the system that
supplies water to more than 9.7 million residents
countywide.
A barrage of atmospheric river events that swept across
California during the winter and spring has left the state
well-positioned when it comes to water storage. As the
peak of the snowmelt season begins to slow down, the majority
of California’s major reservoirs are at least 90% full – a
promising sign for a state that frequently battles drought and
associated wildfires. Shasta Lake, California’s largest
reservoir, was last reported to be at around 95% capacity,
surpassing its historical average by 117%. The reservoir
affects 35 California counties and plays a crucial role in
managing water for the Sacramento and San Joaquin River
watersheds. … Just as notable is Diamond Valley Lake,
located about 80 miles southeast of Los Angeles in Southern
California. According to data from the California
Department of Water Resources, the water basin was at 97% of
capacity and 128% above its historical average.
Other water supply and snowmelt news around the West:
The 8-Station Index is compiled by the California Department of
Water Resources as a tool to measure the amount of water that
has fallen in the Northern Sierra. Measurements from the eight
stations cover the watersheds of the Sacramento, Feather and
American rivers during the rain season, which begins Oct. 1 and
ends Sept. 30 the following year. During a dry season, the
average precipitation can be as little as 20 inches, while the
wettest season ever recorded was 2016-17 when 94.7 inches fell.
This year, the index is at 53.6 inches, which is 118% of the
season average to date and 101% of the season total. While the
chance for additional rain or snow decreases through the rest
of the season, more rain should add to these totals before the
season ends. This is good news, considering most Valley spots
are running below the average this season.
Other snowpack, water supply and drought news around the
West:
It’s been a late season bonanza up north, with snowpack levels
sitting at 120 percent of average north of Lake Tahoe. The
central Sierra are a little less well-off but still close to
normal. The southern Sierra have not had their best winter
ever, but even still snow water equivalent is around 85 percent
of normal. There have certainly been worse years in California.
It’s when you get into the interior West that the problems
start. Take Colorado. Their peak snowpack is likely to be the
lowest since 2018. The northern part of the state has done well
with near average snowfall this year. The Colorado River
headwaters are also running near average, but southern
Colorado, particularly the San Juan and Upper Rio Grande basins
are in bad shape. Snow water equivalents are running about 60
percent of the median right now, or well, well below average.
The story improves some in Utah, where the basins are a little
noisier, but in general not in bad shape outside of southern
Utah. Similar story in Wyoming and Idaho. Not great, not
terrible. Oregon? Fantastic winter. Washington? Less so. But
for Arizona and New Mexico, it was a dreadful winter.
Other snowpack and water supply news around the West:
Over the last three years, the Colorado River Basin has
experienced three relatively healthy winters. But that
decent snowpack, after melting, hasn’t filled reservoirs like
Lake Mead and Lake Powell as much as water users across the
West might like, due to years of drought and
overuse. Recent forecasts show Lake Mead and Lake Powell
will remain roughly one-third full after snow melts down from
the mountains across the West into the Colorado River and its
tributaries this year. … This year’s lackluster
forecasted runoff into Lake Powell coincides with tense
political negotiations between the seven states that use
Colorado River water: Arizona, California, Colorado, Nevada,
New Mexico, Utah and Wyoming.
Other water supply and snowpack news around the West:
Nearly all of California’s major reservoirs are fuller than
they were in previous years after a wet and stormy
winter. … The state’s largest reservoir, Lake Shasta, is
at 92% capacity as of Sunday, which amounts to 115% of its
historical capacity for this time of year, according to data
from the California Department of Water Resources. The lake is
at a surface elevation of 1,055 feet, according to data
from the U.S. Bureau of Reclamation, a continuation of rising
water levels since the holiday season’s heavy downpours.
(Shasta Lake is considered full at 1,067 feet, according to
Lakes Online, a website that records lake data.) The season’s
rains also have filled California’s other large reservoirs,
including Lake Oroville and Trinity Lake, which are now at at
90% and 87% capacity, respectively. If Oroville surpasses 100%,
it would be the third straight year the reservoir has hit
capacity.
Other water supply and snowpack news around the West:
… Current snowpack levels in the Upper Colorado River
Basin hit 90% of normal on Friday. The region includes
parts of Colorado, New Mexico, Utah and Wyoming, providing the
runoff that collects in reservoirs along the river and
eventually reaches Lake Powell and Lake Mead. And 90% is better
than where snowpack stood on Monday, when it had declined to
86%. It’s been a volatile end to winter, with big swings rather
than a steady increase to peak levels. Snowpack measurements —
SWE, or snow water equivalent — generally peak the first week
of April, when temperatures warm and more snow melts than new
accumulation from snowfall.
Water years in California can be all over the place
with massive years immediately followed by major droughts. It’s
been described as hit and miss, but rarely do you get a
hit-hit-hit situation in one key metric for water in the state:
snowpack. Snowpack is highly variable since it’s a component of
water and temperature. You can have big snowfalls followed up
by warm and dry conditions, then by early spring when snow melt
and runoff is most important, some of the snowpack may be
already gone. … This water year is unique since most of
the snow has yet to melt and already California reservoirs as a
whole are well above average at 115%. … Many lakes are nearly
90% full with many months of runoff and inflows to
come. Reservoirs in the Central and Southern Region are
not quite as full, but still remain above average or at least
close bringing more good water news to the rest of the state.
Other snowpack and water supply news around the West:
In a wide-ranging ruling that could have larger implications
for public interest lawsuits throughout California, the 5th
District Court of Appeal reversed a preliminary injunction that
had required water in the Kern River through the heart of
Bakersfield. … Bring Back the Kern, Water Audit California
and several other public interest groups sued the City of
Bakersfield in 2022 for dewatering the river. They are
demanding the city study the environmental impacts of its river
operations. That lawsuit is set for trial in December. The
preliminary injunction was an outgrowth of that 2022 lawsuit.
It was an attempt to keep water in the river for fish that had
come teeming back with high flows in 2023. The 5th
District’s ruling, issued Wednesday, reversed the injunction
but didn’t close the door to a possible future injunction and,
in fact, gave lengthy direction for how that could be done.
California is only halfway through the rain year, and in
Redding’s case, the rainfall and snowfall amounts exceed what
the area typically receives in total precipitation, making 2025
one of the wettest years since 2019. …Wet winter storms
left waters in California’s largest reservoir,
Lake Shasta, less than 16 feet from the top on Tuesday.
Precipitation in March pushed the lake level more than 18 feet,
according to data from the California Department of Water
Resources, boosting the top almost as high as Shasta Dam was
after torrential rains in early February. It is expected the
lake may be full by end of May.
In a much-needed break after multiple years of severe droughts
over the past two decades, California’s statewide Sierra Nevada
snowpack, which provides nearly one-third of the state’s water
supply, was at 96% of its historical average on Tuesday, up
from 83% a month before. The April 1 reading, considered the
most important of the year by water managers because it comes
at the end of the winter season, follows two previous years
when the snowpack reached 111% of normal on April 1 last year
and 237% in 2023. Although Tuesday fell just short of a third
year in a row above 100%, together the past three years
represent most bountiful three-year period for the Sierra
snowpack in 25 years. The last time there was this much snow
three years in a row came in 1998, 1999 and 2000.
Significant snow falling in the Sierra Nevada over the next few
days could be the region’s last big snow dump of the season,
showcasing a dramatic rebound for the snowpack that provides a
significant portion of California’s water
reserves through the rest of the year. Snow started
falling in the Sierra Nevada, the California mountain range
that straddles the state’s border with Nevada, on Sunday, and
plenty more is expected through Tuesday. Elevations above 4,000
feet are expected to record one to four feet of snow, while the
highest peaks over 8,000 feet could pick up five feet.
Despite some heavy rainstorms and squalls of snow in recent
months, the Sierra Nevada snowpack today stands at 90% of
average, according to state officials. This year’s measurements
mark the first below-average snowpack since 2022, when it
dropped to a dismal 38% of the historical average. Last year at
this time, the statewide calculation reached 110% of the
average, and in 2023, the snowpack was one of the largest ever,
measuring more than twice the average. More snow is on the way,
however, which could make this year right around average.
On Tuesday, a crew from Pacific Gas & Electric took to the
skies in a helicopter to access a remote part of the Lassen
Volcanic National Park for their snow survey. PG&E, which
is dependent on the snow melt to help generate hydroelectricity
around the state of California, conducted the survey to help
predict just how much snow melt is expected in the coming
months. … At the conclusion of the survey, PG&E says
that crews measured 119 inches of water content at the
measurement location in Lassen Volcanic National Park, which is
11 percent above average for this time of the year.
The pressure is on: Colorado’s average snowpack statewide masks
worrisome water conditions in the south, where water providers
are banking on more storms to boost water supplies before
snowmelt begins in April. Much of Colorado’s annual water
supply is stored in its winter snowpack, which builds up until
early April when it melts and flows into soils, streams and
reservoirs. Statewide, Colorado is headed toward that April 8
peak with 92% of its normal snowpack for this time of year. …
The Colorado Headwaters Basin, where the Colorado River begins;
the Yampa-White-Little Snake combined basin, which supplies
Western Slope communities in the northwestern corner of the
state; and the South Platte Basin, which feeds rivers on the
Front Range, are all in good condition.
The California Department of Water Resources announced Tuesday
that the wet and cold storms that moved through California
during March have allowed for another increase for the State
Water Project allocation forecast for 2025. Officials with the
DWR say that the allocation has been increased to 40
percent of the requested water supplies, which is a 5 percent
increase for the 35 percent allocation in February. The latest
allocation forecast is based on increases in precipitation,
snowpack, and reservoir storage in the past month. The DWR says
that the allocation increase comes ahead of the April 1 snow
surveys taking place (this) week, when the snowpack in the
Sierra Nevada typically peaks.
… Despite some recent rainstorms, the majority of Southern
California remains in “severe” or “extreme” drought conditions,
as of the latest report from the U.S. Drought Monitor.
Precipitation for this water year, which begins Oct. 1, is
still well below average for the southern third of the state.
In coastal areas, rainfall amounts are about 40% to 60% of
average for this time of year; in the state’s most southwestern
corner, it’s even lower, according to California Water Watch.
While Northern California’s precipitation and snowpack are
above average for the year, the Southern Sierra still remains
at about 87% of average for this time of year, according to the
California Department of Water Resources.
Recent snowstorms in the Colorado Rockies have helped elevate
snowpack levels as the calendar turns to spring. About two
weeks remain to build up snowpack ahead of what climate experts
say will be another dry year in the desert Southwest. A report
released on Thursday by the National Oceanic and Atmospheric
Administration (NOAA) forecasts a greater-than-50% chance that
the drought will persist through the end of June. The affected
area includes Southern Nevada, Southern California, Southern
Utah, all of Arizona, and southwest Colorado.
Steady storms continued to benefit California in March, with
reservoirs across the state gaining 200,000 acre-feet of water
from the beginning of the month to Tuesday — that’s
enough to fill 100,000 Olympic-size swimming
pools. Across California, reservoir storage is well above
average for this time of year, according to the Department
of Water Resources. Statewide storage was 115% of normal, as of
Tuesday. … California’s largest reservoir, Shasta Lake,
was at 86% of its total capacity on Thursday, or 113% of normal
for this time of year. … Lake Oroville, the state’s
second-largest reservoir, received some 30 billion gallons of
water, with water levels rising by more than 6 feet. … The
statewide snowpack is 93% of normal for this time of year, as
of Monday.
Other water supply and snowpack news around the West:
Much of California’s water supply
originates in the Sierra Nevada, making it dependent on the
health of forests. But those forests are suffering from
widespread tree mortality and other ecosystem degradation
resulting mostly from the growing frequency and severity
of droughts and wildfires.
On our Headwaters
Tour July 24-25, we will visit Eldorado and Tahoe
national forests to learn about new forest management practices,
including wildfire prevention and recovery.
With temperatures spiking across
California this week, now is a great time to reserve your
spot on our Headwaters Tour July
24-25 when we’ll explore the role of the Sierra
Nevada snowpack in the state’s water supply and how heatwaves can
accelerate snowmelt.
A steady stream of water spilled from Lake Casitas Friday, a
few days after officials declared the Ojai Valley reservoir had
reached capacity for the first time in a quarter century. Just
two years earlier, the drought-stressed reservoir, which
provides drinking water for the Ojai
Valley and parts of Ventura, had dropped under 30%.
The Casitas Municipal Water District was looking at emergency
measures if conditions didn’t improve, board President Richard
Hajas said. Now, the lake is full, holding roughly 20 years of
water.
Last year’s snow deluge in California, which quickly erased a
two decade long megadrought, was essentially a
once-in-a-lifetime rescue from above, a new study found. Don’t
get used to it because with climate change the 2023 California
snow bonanza —a record for snow on the ground on April 1 — will
be less likely in the future, said the study in Monday’s
journal Proceedings of the National Academy of Sciences.
… UCLA climate scientist Daniel Swain, who wasn’t part
of the study but specializes in weather in the U.S. West, said,
“I would not be surprised if 2023 was the coldest, snowiest
winter for the rest of my own lifetime in California.”
Tour participants during a hard hat tour of Hoover DamThis tour explored the lower Colorado River firsthand where virtually every drop of the river is allocated, yet demand is growing from myriad sources — increasing population, declining habitat, drought and climate change.
The 1,450-mile river is a lifeline to some 40 million people in the Southwest across seven states, 30 tribal nations and Mexico. How the Lower Basin states – Arizona, California and Nevada – use and manage this water to meet agricultural, urban, environmental and industrial needs was the focus of this tour.
Hilton Garden Inn Las Vegas Strip South
7830 S Las Vegas Blvd
Las Vegas, NV 89123
Learn the history and challenges facing the West’s most dramatic
and developed river.
The Layperson’s Guide to the Colorado River Basin introduces the
1,450-mile river that sustains 40 million people and millions of
acres of farmland spanning seven states and parts of northern
Mexico.
The 28-page primer explains how the river’s water is shared and
managed as the Southwest transitions to a hotter and drier
climate.
Moab is a growing town of 5,300 that up to 5 million people
visit each year to hike nearby Arches and Canyonlands national
parks, ride mountain bikes and all-terrain vehicles, or raft
the Colorado River. Like any western resort town, it
desperately needs affordable housing. What locals say it
doesn’t need is a high-end development on a sandbar projecting
into the Colorado River, where groves of cottonwoods, willows
and hackberries flourish. “Delusional,” shameful” or
“outrageous” is what many locals call this Kane Creek
Preservation and Development project. - Written by Mary Moran, a contributor to Writers on
the Range
Water supplies have tightened to the point that Phoenix and the
water supplier for 19 million Southern California residents are
racing to adopt an expensive technology called “direct potable
reuse” or “advanced purification” to reduce their reliance on
imported water from the dwindling Colorado River.
The tribes are seeing the value of their largely unused river
water entitlements rise as the Colorado dwindles, and they are
gaining seats they’ve never had at the water bargaining table as
government agencies try to redress a legacy of exclusion.
This tour explored the Sacramento River and its tributaries through a scenic landscape while learning about the issues associated with a key source for the state’s water supply.
All together, the river and its tributaries supply 35 percent of California’s water and feed into two major projects: the State Water Project and the federal Central Valley Project.
Water Education Foundation
2151 River Plaza Drive, Suite 205
Sacramento, CA 95833
The change is buried in a sweeping state budget-related law,
enacted in July, that also makes it easier for property owners
and water managers to divert floodwater for storage underground.
The maps provided by the California Department of Water Resources
for the first time pinpoint paleo valleys and similar prime
underground storage zones traditionally found with some guesswork
by drilling exploratory wells and other more time-consuming
manual methods. The new maps are drawn from data on the
composition of underlying rock and soil gathered by low-flying
helicopters towing giant magnets.
The unique peeks below ground are saving water agencies’
resources and allowing them to accurately devise ways to capture
water from extreme storms and soak or inject the surplus
underground for use during the next drought.
“Understanding where you’re putting and taking water from really
helps, versus trying to make multimillion-dollar decisions based
on a thumb and which way the wind is blowing,” said Aaron Fukuda,
general manager of the Tulare Irrigation District, an early
adopter of the airborne electromagnetic or
AEM technology in California.
Much of California’s water supply
originates in the Sierra Nevada, making it dependent on the
health of forests. But those forests are suffering from
widespread tree mortality and other ecosystem degradation
resulting mostly from the growing frequency and severity
of droughts and wildfires.
But with the federal government threatening unprecedented water
cuts amid decades of drought and declining reservoirs, the Upper
Basin states of Wyoming, Utah, Colorado and New Mexico are
muscling up to protect their shares of an overallocated river
whose average flows in the Upper Basin have already dropped
20 percent over the last century.
They have formed new agencies to better monitor their interests,
moved influential Colorado River veterans into top negotiating
posts and improved their relationships with Native American
tribes that also hold substantial claims to the river.
Tour participants during a hard hat tour of Hoover DamThis tour explored the lower Colorado River firsthand where virtually every drop of the river is allocated, yet demand is growing from myriad sources — increasing population, declining habitat, drought and climate change.
The 1,450-mile river is a lifeline to some 40 million people in the Southwest across seven states, 30 tribal nations and Mexico. How the Lower Basin states – Arizona, California and Nevada – use and manage this water to meet agricultural, urban, environmental and industrial needs was the focus of this tour.
Hilton Garden Inn Las Vegas Strip South
7830 S Las Vegas Blvd
Las Vegas, NV 89123
The start of 2023 brought a parade of torrential Pacific storms
to bone dry California. Snow piled up across the Sierra Nevada at
a near-record pace while runoff from the foothills gushed into
the Central Valley, swelling rivers over their banks and filling
seasonal creeks for the first time in half a decade.
Suddenly, water managers and farmers toiling in one of the
state’s most groundwater-depleted regions had an opportunity to
capture stormwater and bank it underground. Enterprising agencies
diverted water from rushing rivers and creeks into manmade
recharge basins or intentionally flooded orchards and farmland.
Others snagged temporary permits from the state to pull from
streams they ordinarily couldn’t touch.
This special Foundation water tour journeyed along the Eastern Sierra from the Truckee River to Mono Lake, through the Owens Valley and into the Mojave Desert to explore a major source of water for Southern California, this year’s snowpack and challenges for towns, farms and the environment.
Decades later, still armed with an obsession for extreme weather,
Schwartz has landed in one of the snowiest places in the West,
leading a research lab whose mission is to give California water
managers instant information on the depth and quality of snow
draping the slopes of the Sierra Nevada.
A century later, it’s clear the water they bet on is not there.
More than two decades of drought, lake evaporation and overuse of
water have nearly drained the river’s two anchor reservoirs, Lake
Powell on the Arizona-Utah border and Lake Mead near Las Vegas.
Climate change is rendering the basin drier, shrinking spring
runoff that’s vital for river flows, farms, tribes and cities
across the basin – and essential for refilling reservoirs.
The states that endorsed the Colorado River Compact in 1922 – and
the tribes and nation of Mexico that were excluded from the table
– are now straining to find, and perhaps more importantly accept,
solutions on a river that may offer just half of the water that
the Compact assumed would be available. And not only are
solutions not coming easily, the relationships essential for
compromise are getting more frayed.
This tour explored the Sacramento River and its tributaries through a scenic landscape while learning about the issues associated with a key source for the state’s water supply.
All together, the river and its tributaries supply 35 percent of California’s water and feed into two major projects: the State Water Project and the federal Central Valley Project.
Water Education Foundation
2151 River Plaza Drive, Suite 205
Sacramento, CA 95833
The three-year span, 2019 to 2022, was officially the driest ever
statewide going back to 1895 when modern records began in
California. But that most recent period of overall drought
also saw big swings from very wet to very dry stretches such
as the 2021-2022 water year that went from a relatively
wet Oct.-Dec. beginning to the driest Jan.-March period in the
state’s history.
With La Niña conditions predicted to persist into the
winter, what can reliably be said about the prospects for
Water Year 2023? Does La Niña really mean anything for California
or is it all washed up as a predictor in this new reality of
climate whiplash, and has any of this affected our reliance on
historical patterns to forecast California’s water supply?
Participants found out what efforts are being made to
improve sub-seasonal to seasonal (S2S) precipitation
forecasting for California and the Colorado River Basin at our
one-day Winter Outlook Workshop December
8 in Irvine, CA.
Beckman Center
Huntington Room
100 Academy Way
Irvine, California 92617
Chuck Cullom, executive director of the Upper Colorado River Commission. (Source: Upper Colorado River Commission)With 25 years of experience working
on the Colorado River, Chuck Cullom is used to responding to
myriad challenges that arise on the vital lifeline that seven
states, more than two dozen tribes and the country of Mexico
depend on for water. But this summer problems on the
drought-stressed river are piling up at a dizzying pace:
Reservoirs plummeting to record low levels, whether Hoover Dam
and Glen Canyon Dam can continue to release water and produce
hydropower, unprecedented water cuts and predatory smallmouth
bass threatening native fish species in the Grand Canyon.
“Holy buckets, Batman!,” said Cullom, executive director of the
Upper Colorado River Commission. “I mean, it’s just on and on and
on.”
Amelia Flores, chairwoman of the Colorado River Indian Tribes. (Source: CRIT)As water interests in the Colorado
River Basin prepare to negotiate a new set of operating
guidelines for the drought-stressed river, Amelia Flores wants
her Colorado River Indian Tribes (CRIT) to be involved in the
discussion. And she wants CRIT seated at the negotiating table
with something invaluable to offer on a river facing steep cuts
in use: its surplus water.
CRIT, whose reservation lands in California and Arizona are
bisected by the Colorado River, has some of the most senior water
rights on the river. But a federal law enacted in the late 1700s,
decades before any southwestern state was established, prevents
most tribes from sending any of its water off its reservation.
The restrictions mean CRIT, which holds the rights to nearly a
quarter of the entire state of Arizona’s yearly allotment of
river water, is missing out on financial gain and the chance to
help its river partners.
This tour explored the Sacramento River and its tributaries
through a scenic landscape while learning about the issues
associated with a key source for the state’s water supply.
All together, the river and its tributaries supply 35 percent of
California’s water and feed into two major projects: the State
Water Project and the federal Central Valley Project.
Water Education Foundation
2151 River Plaza Drive, Suite 205
Sacramento, CA 95833
This tour traveled along the San Joaquin River to learn firsthand
about one of the nation’s largest and most expensive river
restoration projects.
The San Joaquin River was the focus of one of the most
contentious legal battles in California water history,
ending in a 2006 settlement between the federal government,
Friant Water Users Authority and a coalition of environmental
groups.
Hampton Inn & Suites Fresno
327 E Fir Ave
Fresno, CA 93720
This tour explored the lower Colorado River firsthand where virtually every drop of the river is allocated, yet demand is growing from myriad sources — increasing population, declining habitat, drought and climate change.
The 1,450-mile river is a lifeline to some 40 million people in the Southwest across seven states, 30 tribal nations and Mexico. How the Lower Basin states – Arizona, California and Nevada – use and manage this water to meet agricultural, urban, environmental and industrial needs was the focus of this tour.
Hyatt Place Las Vegas At Silverton Village
8380 Dean Martin Drive
Las Vegas, NV 89139
This tour ventured through California’s Central Valley, known as the nation’s breadbasket thanks to an imported supply of surface water and local groundwater. Covering about 20,000 square miles through the heart of the state, the valley provides 25 percent of the nation’s food, including 40 percent of all fruits, nuts and vegetables consumed throughout the country.
The lower Colorado River has virtually every drop allocated, yet demand is growing from myriad sources — increasing population, declining habitat, drought and climate change.
The 1,450-mile river is a lifeline to 40 million people in the Southwest across seven states, 30 tribal nations and Mexico. How the Lower Basin states – Arizona, California and Nevada – use and manage this water to meet agricultural, urban, environmental and industrial needs was the focus of this tour.
Hyatt Place Las Vegas At Silverton Village
8380 Dean Martin Drive
Las Vegas, NV 89139
Trujillo has experience working in both the Upper and Lower
Basins of the Colorado River, basins that split the river’s water
evenly but are sometimes at odds with each other. She was a
lawyer for the state of New Mexico, one of four states in the
Upper Colorado River Basin, when key operating guidelines for
sharing shortages on the river were negotiated in 2007. She later
worked as executive director for the Colorado River Board of
California, exposing her to the different perspectives and
challenges facing California and the other states in the river’s
Lower Basin.
This tour guided participants on a virtual exploration of the Sacramento River and its tributaries and learn about the issues associated with a key source for the state’s water supply.
All together, the river and its tributaries supply 35 percent of California’s water and feed into two major projects: the State Water Project and the federal Central Valley Project.
This tour guided participants on a virtual journey deep into California’s most crucial water and ecological resource – the Sacramento-San Joaquin Delta. The 720,000-acre network of islands and canals support the state’s two major water systems – the State Water Project and the Central Valley Project. The Delta and the connecting San Francisco Bay form the largest freshwater tidal estuary of its kind on the West coast.
Las Vegas has reduced its water consumption even as its population has increased. (Source: Southern Nevada Water Authority)Las Vegas, known for its searing summertime heat and glitzy casino fountains, is projected to get even hotter in the coming years as climate change intensifies. As temperatures rise, possibly as much as 10 degrees by end of the century, according to some models, water demand for the desert community is expected to spike. That is not good news in a fast-growing region that depends largely on a limited supply of water from an already drought-stressed Colorado River.
On average, more than 60 percent of
California’s developed water supply originates in the Sierra
Nevada and the southern spur of the Cascade Range. Our water
supply is largely dependent on the health of our Sierra forests,
which are suffering from ecosystem degradation, drought,
wildfires and widespread tree mortality.
This tour ventured into the Sierra to examine water issues
that happen upstream but have dramatic impacts downstream and
throughout the state.
Jeff Kightlinger, general manager of the Metropolitan Water
District of Southern California for the last 15 years, has
focused on diversifying his agency’s water supply and building
security through investment. That means looking beyond MWD’s
borders to ensure the reliable delivery of water to two-thirds of
California’s population.
Water affordability concerns, long an issue in a state where
millions of people struggle to make ends meet, jumped into
overdrive last year as the pandemic wrenched the economy. Jobs
were lost and household finances were upended. Even with federal
stimulus aid and unemployment checks, bills fell by the wayside.
A report by the State Water Resources Control Board recommends
that new water rights permits be tailored to California’s
increasingly volatile hydrology and be adaptable enough to ensure
water exists to meet an applicant’s demand. And it warns
that the increasingly whiplash nature of California’s changing
climate could require existing rights holders to curtail
diversions more often and in more watersheds — or open
opportunities to grab more water in climate-induced floods.
This beautifully illustrated 24×36-inch poster, suitable for
framing and display in any office or classroom, highlights the
Sacramento-San Joaquin River Delta, its place as a center of
farming, its importance as an ecological resource and its
vital role in California’s water supply system.
The text, photos and graphics explain issues related to land
subsidence, levees and flooding, urbanization, farming, fish and
wildlife protection. An inset map illustrates the tidal action
that increases the salinity of the Delta’s waterways.
A government agency that controls much of California’s water
supply released its initial allocation for 2021, and the
numbers reinforced fears that the state is falling into another
drought. The U.S. Bureau of Reclamation said Tuesday that most
of the water agencies that rely on the Central Valley Project
will get just 5% of their contract supply, a dismally low
number. Although the figure could grow if California gets more
rain and snow, the allocation comes amid fresh weather
forecasts suggesting the dry winter is continuing. The National
Weather Service says the Sacramento Valley will be warm and
windy the next few days, with no rain in the forecast.
Members of the 2020 Water Leaders class examined how
to adapt water management to climate change. Read their
policy recommendations in the class report, Adapting
California Water Management to Climate Change: Charting a Path
Forward, to learn more.
Lately, however, scientists say the rate of change has kicked into overdrive, fueled in part by climate change, and is limiting the ability of science and Delta water managers to keep up. The rapid pace of upheaval demands a new way of conducting science and managing water in the troubled estuary.
This event explored the lower Colorado River where virtually every drop of the river is allocated, yet demand is growing from myriad sources — increasing population, declining habitat, drought and climate change.
The 1,450-mile river is a lifeline to 40 million people in the Southwest across seven states and Mexico. How the Lower Basin states – Arizona, California and Nevada – use and manage this water to meet agricultural, urban, environmental and industrial needs was the focus of this tour.
Every other year we hold an
invitation-only Colorado River Symposium attended by various
stakeholders from across the seven Western states and Mexico that
rely on the iconic river. We host this three-day event in Santa
Fe, N.M., where the 1922 Colorado River Compact was signed, as
part of our mission to catalyze critical conversations to build
bridges and inform collaborative decision-making.
Members of the 2019 Water Leaders class examined the
emerging issue of wildfire impacts on California’s water
supply and quality. Read their policy recommendations in the
class report, Fire and Water: An Emerging Nexus in
California, to learn more.
However, new tools and operating methods are emerging that could
lead the way to a redefined system that improves both water
supply and flood protection capabilities.
It’s been a year since two devastating wildfires on opposite ends
of California underscored the harsh new realities facing water
districts and cities serving communities in or adjacent to the
state’s fire-prone wildlands. Fire doesn’t just level homes, it
can contaminate water, scorch watersheds, damage delivery systems
and upend an agency’s finances.
That network of stream gauges got a big boost Sept. 30 with the signing of SB 19. Authored by Sen. Bill Dodd (D-Napa), the law requires the state to develop a stream gauge deployment plan, focusing on reactivating existing gauges that have been offline for lack of funding and other reasons. Nearly half of California’s stream gauges are dormant.
Successfully recharging aquifers could bring multiple benefits
for farms and wildlife and help restore the vital interconnection
between groundwater and rivers or streams. As local areas around
California draft their groundwater sustainability plans, though,
landowners in the hardest hit regions of the state know they will
have to reduce pumping to address the chronic overdraft in which
millions of acre-feet more are withdrawn than are naturally
recharged.
Indeed, while the rest of California breathed a sigh of relief with the return of wet weather after the severe drought of 2012–2016, places such as Santa Barbara still grappled with dry conditions.
Fires devastate the Sierra watersheds upon which millions of
Californians depend — scorching the ground, unleashing a
battering ram of debris and turning hillsides into gelatinous,
stream-choking mudflows.
Strategic placement of rocks promotes a more natural streamflow that benefits ranchers and fish. (Source: Paul Bruchez)High in the headwaters of the Colorado River, around the hamlet of Kremmling, Colorado, generations of families have made ranching and farming a way of life, their hay fields and cattle sustained by the river’s flow. But as more water was pulled from the river and sent over the Continental Divide to meet the needs of Denver and other cities on the Front Range, less was left behind to meet the needs of ranchers and fish.
“What used to be a very large river that inundated the land has really become a trickle,” said Mely Whiting, Colorado counsel for Trout Unlimited. “We estimate that 70 percent of the flow on an annual average goes across the Continental Divide and never comes back.”
Registration includes a full day of discussions by leading
stakeholders and policymakers on key issues, as well as coffee,
materials, gourmet lunch and an outdoor reception by the
Sacramento River that will offer the opportunity to network with
speakers and other attendees. The summit also features a silent
auction to benefit our Water Leaders program featuring
items up for bid such as kayaking trips, hotel stays and lunches
with key people in the water world.
But in the weekly sprint through work, it’s easy to miss
some interesting nuggets you might want to read. So while we’re
taking a publishing break to work on other water articles planned
for later this year, we want to help you catch up on
Western Water stories from the first half of this year
that you might have missed.
Sacramento RiverOur 36th annual
Water Summit,
happening Oct. 30 in Sacramento, will feature the theme “Water
Year 2020: A Year of Reckoning,” reflecting upcoming regulatory
deadlines and efforts to improve water management and policy in
the face of natural disasters.
The Summit will feature top policymakers and leading stakeholders
providing the latest information and a variety of viewpoints on
issues affecting water across California and the West.
Pyramid LakeNew to this year’s slate of water
tours, our Edge of
Drought Tour Aug. 27-29 will venture into the Santa
Barbara area to learn about the challenges of limited local
surface and groundwater supplies and the solutions being
implemented to address them.
Despite Santa Barbara County’s decision to lift a drought
emergency declaration after this winter’s storms replenished
local reservoirs, the region’s hydrologic recovery often has
lagged behind much of the rest of the state.
We have an unknown distance yet to run, an unknown river to explore. What falls there are, we know not; what rocks beset the channel, we know not; what walls ride over the river, we know not. Ah, well! We may conjecture many things.
~John Wesley Powell
Explorer John Wesley Powell and Paiute Chief Tau-Gu looking over the Virgin River in 1873. (Image: National Park Service)Powell scrawled those words in his journal as he and his expedition paddled their way into the deep walls of the Grand Canyon on a stretch of the Colorado River in August 1869. Three months earlier, the 10-man group had set out on their exploration of the iconic Southwest river by hauling their wooden boats into a major tributary of the Colorado, the Green River in Wyoming, for their trip into the “great unknown,” as Powell described it.
Sixty percent of California’s
developed water supply originates high in the Sierra Nevada,
making the state’s water supply largely dependent on the health
of Sierra forests. But those forests are suffering from ecosystem
degradation, drought, wildfires and widespread tree mortality.
On our Headwaters Tour
June 27-28, we will visit Eldorado and Tahoe national forests to
learn about new forest management practices, including efforts to
both prevent wildfires and recover from them.
Set to expire in 2026, the current guidelines for water deliveries and shortage sharing, launched in 2007 amid a multiyear drought, were designed to prevent disputes that could provoke conflict.
That agenda includes the governor’s desire for a “fresh approach”
on water, scaling back the conveyance plan in the Sacramento-San
Joaquin Delta and calling for more water recycling, expanded
floodplains in the Central Valley and more groundwater recharge.
Former Interior Secretary Bruce Babbitt gives the Anne J. Schneider Lecture April 3 at Sacramento's Crocker Art Museum. (Image: Water Education Foundation) Bruce Babbitt, the former Arizona
governor and secretary of the Interior, has been a thoughtful,
provocative and sometimes forceful voice in some of the most
high-profile water conflicts over the last 40 years, including
groundwater management in Arizona and the reduction of
California’s take of the Colorado River. In 2016, former
California Gov. Jerry Brown named Babbitt as a special adviser to
work on matters relating to the Sacramento-San Joaquin Delta and
the Delta tunnels plan.
Water sprinklers irrigate a field in Kern County, in the southern region of the San Joaquin Valley. (Image: California Department of Water Resources.)Groundwater helped make Kern County
the king of California agricultural production, with a $7 billion
annual array of crops that help feed the nation. That success has
come at a price, however. Decades of unchecked groundwater
pumping in the county and elsewhere across the state have left
some aquifers severely depleted. Now, the county’s water managers
have less than a year left to devise a plan that manages and
protects groundwater for the long term, yet ensures that Kern
County’s economy can continue to thrive, even with less water.
Now her career is taking a different direction. Harkins, 58, was
appointed by President Trump last August to take the helm of the
United States section of the U.S.-Mexico agency that oversees
myriad water matters between the two countries as they seek to
sustainably manage the supply and water quality of the Colorado
River, including its once-thriving Delta in Mexico, and other
rivers the two countries share. She is the first woman to be
named the U.S. Commissioner of the International Boundary and
Water Commission for either the United States or Mexico in the
commission’s 129-year history.
This tour explored the lower Colorado River where virtually every drop of the river is allocated, yet demand is growing from myriad sources — increasing population, declining habitat, drought and climate change.
The 1,450-mile river is a lifeline to 40 million people in the Southwest across seven states and Mexico. How the Lower Basin states – Arizona, California and Nevada – use and manage this water to meet agricultural, urban, environmental and industrial needs is the focus of this tour.
Silverton Hotel
3333 Blue Diamond Road
Las Vegas, NV 89139
In Los Angeles, a city of about 4 million people, efforts are underway to dramatically slash purchases of imported water while boosting the amount from recycling, stormwater capture, groundwater cleanup and conservation. Mayor Eric Garcetti in 2014 announced a plan to reduce the city’s purchase of imported water from Metropolitan Water District by one-half by 2025 and to provide one-half of the city’s supply from local sources by 2035. (The city considers its Eastern Sierra supplies as imported water.)
Far and away the most ambitious goal has been set by the city of
Santa Monica, which in 2014 embarked on a course to be virtually
water independent through local sources by 2023. In the 1990s,
Santa Monica was completely dependent on imported water. Now, it
derives more than 70 percent of its water locally.
These were among the topics that Western Water news explored in 2018.
We’re already planning a full slate of stories for 2019. You can sign up here to be alerted when new stories are published. In the meantime, take a look at what we dove into in 2018:
The latest sobering assessment landed the day after Thanksgiving,
when U.S. Global Change Research Program’s Fourth National Climate
Assessment concluded that Earth’s climate is changing rapidly
compared to the pace of natural variations that have occurred
throughout its history, with greenhouse gas emissions largely the
cause.
This 2-day, 1-night tour offered participants the opportunity to
learn about water issues affecting California’s scenic Central
Coast and efforts to solve some of the challenges of a region
struggling to be sustainable with limited local supplies that
have potential applications statewide.
In the water world, 2018 has been a similar banner year, with
noteworthy appointments of women to top leadership posts in
California — Karla Nemeth at the California Department of Water
Resources and Gloria Gray at the Metropolitan Water District of
Southern California.
The 2018 Water Leaders class examined ways to improve water
management through data. Read their recommendations in the class
report, Catch the Data Wave: Improving Water Management
through Data.
Colorado RiverAs the Colorado River Basin becomes
drier and shortage conditions loom, one great variable remains:
How much of the river’s water belongs to Native American tribes?
Native Americans already use water from the Colorado River and
its tributaries for a variety of purposes, including leasing it
to non-Indian users. But some tribes aren’t using their full
federal Indian reserved water right and others have water rights
claims that have yet to be resolved. Combined, tribes have rights
to more water than some states in the Colorado River Basin.
Just because El Niño may be lurking
off in the tropical Pacific, does that really offer much of a
clue about what kind of rainy season California can expect in
Water Year 2019?
Will a river of storms pound the state, swelling streams and
packing the mountains with deep layers of heavy snow much like
the exceptionally wet 2017 Water Year (Oct. 1, 2016 to Sept. 30,
2017)? Or will this winter sputter along like last winter,
leaving California with a second dry year and the possibility of
another potential drought? What can reliably be said about the
prospects for Water Year 2019?
At Water Year
2019: Feast or Famine?, a one-day event on Dec. 5 in Irvine,
water managers and anyone else interested in this topic will
learn about what is and isn’t known about forecasting
California’s winter precipitation weeks to months ahead, the
skill of present forecasts and ongoing research to develop
predictive ability.
Now, a state appellate court has for the first time extended that same public trust doctrine to groundwater that feeds a navigable river, in this case the Scott River flowing through a picturesque valley of farms and alfalfa in Siskiyou County in the northern reaches of California.
This tour explored the Sacramento River and its tributaries
through a scenic landscape as participants learned about the
issues associated with a key source for the state’s water supply.
All together, the river and its tributaries supply 35 percent of
California’s water and feed into two major projects: the State
Water Project and the federal Central Valley Project. Tour
participants got an on-site update of Oroville Dam spillway
repairs.
Water Year 2018 – from Oct. 1, 2017 to Sept. 30, 2018 -
marked a return to dry conditions statewide following an
exceptionally wet 2017, according to DWR’s Water
Year 2018 report. But 2017 was exceptional as all but two of
the water years in the past decade experienced drought.
Was Water Year 2018 simply a single dry year or does it
signal the beginning of another drought? And what can
reliably be said about the prospects for Water Year 2019? Does El
Niño really mean anything for California or is it all washed up
as a predictor?
Attendees found out at this one-day event Dec. 5 in
Irvine, Water Year 2019: Feast or
Famine?
Beckman Center
Auditorium - Huntington Room
100 Academy Way
Irvine, California 92617
So what should be the next governor’s water priorities?
That was one of the questions put to more than 150 participants
during a wrap-up session at the end of the Water Education
Foundation’s Sept. 20 Water Summit in Sacramento.
For years, water use has generally been described in terms of
acre-foot per a certain number of households, keying off the
image of an acre-foot as a football field a foot deep in water.
The long-time rule of thumb: One acre-foot of water would supply
the indoor and outdoor needs of two typical urban households for
a year.
Brenda Burman, the first woman to head the Bureau of Reclamation. (Source: Bureau of Reclamation)The Colorado River Basin is more
than likely headed to unprecedented shortage in 2020 that could
force supply cuts to some states, but work is “furiously”
underway to reduce the risk and avert a crisis, Bureau of
Reclamation Commissioner Brenda Burman told an audience of
California water industry people.
During a keynote address at the Water Education Foundation’s
Sept. 20 Water Summit in Sacramento, Burman said there is
opportunity for Colorado River Basin states to control their
destiny, but acknowledged that in water, there are no guarantees
that agreement can be reached.
Back in the late 1800s, pioneer John Sites built his ranch there and a small township, now gone, bore his name. Today, the community of a handful of families and ranchers still maintains a proud heritage.
Yet those challenges will be quite familiar to Haas, an attorney who for the past year has served as deputy director and general counsel of the commission. (She replaced longtime Executive Director Don Ostler). She has a long history of working within interstate Colorado River governance, including representing New Mexico as its Upper Colorado River commissioner and playing a central role in the negotiation of the recently signed U.S.-Mexico agreement known as Minute 323.
Sixty percent of California’s developed water supply
originates high in the Sierra Nevada mountains. Our water
supply is largely dependent on the health of our Sierra forests,
which are suffering from ecosystem degradation, drought,
wildfires and widespread tree mortality.
We headed into the foothills and the mountains to examine
water issues that happen upstream but have dramatic impacts
downstream and throughout the state.
GEI (Tour Starting Point)
2868 Prospect Park Dr.
Rancho Cordova, CA 95670.
California Water Commission Chair Armando Quintero (Source: California Water Commission)New water storage is the holy grail
primarily for agricultural interests in California, and in 2014
the door to achieving long-held ambitions opened with the passage
of Proposition
1, which included $2.7 billion for the public benefits
portion of new reservoirs and groundwater storage projects. The
statute stipulated that the money is specifically for the
benefits that a new storage project would offer to the ecosystem,
water quality, flood control, emergency response and recreation.
Nowhere is the domino effect in
Western water policy played out more than on the Colorado River,
and specifically when it involves the Lower Basin states of
California, Nevada and Arizona. We are seeing that play out now
as the three states strive to forge a Drought Contingency Plan.
Yet that plan can’t be finalized until Arizona finds a unifying
voice between its major water players, an effort you can read
more about in the latest in-depth article of Western Water.
Even then, there are some issues to resolve just within
California.
It’s high-stakes time in Arizona. The state that depends on the
Colorado River to help supply its cities and farms — and is
first in line to absorb a shortage — is seeking a unified plan
for water supply management to join its Lower Basin neighbors,
California and Nevada, in a coordinated plan to preserve water
levels in Lake Mead before
they run too low.
If the lake’s elevation falls below 1,075 feet above sea level,
the secretary of the Interior would declare a shortage and
Arizona’s deliveries of Colorado River water would be reduced by
320,000 acre-feet. Arizona says that’s enough to serve about 1
million households in one year.
Groundwater is stressed by a demand that often outpaces natural and artificial recharge. In California, awareness of groundwater’s importance resulted in the landmark Sustainable Groundwater Management Act in 2014 that aims to have the most severely depleted basins in a state of balance in about 20 years.
Along the way, an army of experts has been enlisted to help
characterize the extent of the problem and how the Sustainable
Groundwater Management Act of 2014 is implemented in a manner
that reflects its original intent.
In the past 20 years, however, cannabis — known more widely as
marijuana – has been moving from being a criminal activity to
gaining legitimacy as one of the hundreds of cash crops in the
state’s $46 billion-dollar agriculture industry, first legalized
for medicinal purposes and this year for recreational use.
As we continue forging ahead in 2018
with our online version of Western Water after 40 years
as a print magazine, we turned our attention to a topic that also
got its start this year: recreational marijuana as a legal use.
State regulators, in the last few years, already had been beefing
up their workforce to tackle the glut in marijuana crops and
combat their impacts to water quality and supply for people, fish
and farming downstream. Thus, even if these impacts were perhaps
unbeknownst to the majority of Californians who approved
Proposition 64 in 2016, we thought it important to see if
anything new had evolved from a water perspective now that
marijuana was legal.
We explored the lower Colorado River where virtually every drop
of the river is allocated, yet demand is growing from myriad
sources — increasing population, declining habitat, drought and
climate change.
The 1,450-mile river is a lifeline to 40 million people in
the Southwest across seven states and Mexico. How the Lower Basin
states – Arizona, California and Nevada – use and manage this
water to meet agricultural, urban, environmental and industrial
needs was the focus of this tour.
Hampton Inn Tropicana
4975 Dean Martin Drive, Las Vegas, NV 89118
At our Paleo
Drought Workshop on April 19th in San Pedro, you will hear
from experts at NASA Jet Propulsion Laboratory, University of
Arizona and California Department of Water Resources.
State Water Resources Control Board member E. Joaquin EsquivelJoaquin Esquivel learned that life is
what happens when you make plans. Esquivel, who holds the public
member slot at the State Water Resources Control Board in
Sacramento, had just closed purchase on a house in Washington
D.C. with his partner when he was tapped by Gov. Jerry Brown a
year ago to fill the Board vacancy.
Esquivel, 35, had spent a decade in Washington, first in several
capacities with then Sen. Barbara Boxer, D-Calif., and then as
assistant secretary for federal water policy at the California
Natural Resources Agency. As a member of the State Water Board,
he shares with four other members the difficult task of
ensuring balance to all the uses of California’s water.
Does California need to revamp the way in which water is dedicated to the environment to better protect fish and the ecosystem at large? In the hypersensitive world of California water, where differences over who gets what can result in epic legislative and legal battles, the idea sparks a combination of fear, uncertainty and promise.
Saying that the way California manages water for the environment “isn’t working for anyone,” the Public Policy Institute of California (PPIC) shook things up late last year by proposing a redesigned regulatory system featuring what they described as water ecosystem plans and water budgets with allocations set aside for the environment.
Daniel SwainEvery day, people flock to Daniel
Swain’s social media platforms to find out the latest news and
insight about California’s notoriously unpredictable weather.
Swain, a climate scientist at the Institute of the
Environment and Sustainability at UCLA, famously coined the
term “Ridiculously Resilient Ridge” in December 2013 to describe
the large, formidable high-pressure mass that was parked over the
West Coast during winter and diverted storms away from
California, intensifying the drought.
Swain’s research focuses on atmospheric processes that cause
droughts and floods, along with the changing character of extreme
weather events in a warming world. A lifelong Californian and
alumnus of University of California, Davis, and Stanford
University, Swain is best known for the widely read Weather West blog, which provides
unique perspectives on weather and climate in California and the
western United States. In a recent interview with Western
Water, he talked about the Ridiculously Resilient Ridge, its
potential long-term impact on California weather, and what may
lie ahead for the state’s water supply.
The 2017 Water Leaders class
organized by the Water Education Foundation completed its year
with a report outlining policy recommendations for the
future of water storage in California.
The class of 20 from
various stakeholder groups and backgrounds that hailed from
cities and towns across the state had full editorial control to
chose recommendations. While they did not endorse a specific
storage proposal, they recommended that California:
Deepen your knowledge of California water issues at our popular
Water
101 Workshop and jump aboard the bus the next day to
visit the Sacramento-San Joaquin Delta, a 720,000-acre
network of islands and canals that supports the state’s water
system and is California’s most crucial water and ecological
resource.
For decades, no matter the weather, the message has been preached
to Californians: use water wisely, especially outdoors, which
accounts for most urban water use.
Enforcement of that message filters to the local level, where
water agencies routinely target the notorious “gutter flooder”
with gentle reminders and, if necessary, financial penalties.
Sixty percent of California’s developed water supply
originates high in the Sierra Nevada mountains. Our water
supply is largely dependent on the health of our Sierra forests,
which are suffering from ecosystem degradation, drought,
wildfires and widespread tree mortality.
This three-day, two-night tour explored the lower Colorado River
where virtually every drop of the river is allocated, yet demand
is growing from myriad sources — increasing population,
declining habitat, drought and climate change.
The 1,450-mile river is a lifeline to 40 million people in
the Southwest across seven states and Mexico. How the Lower Basin
states – Arizona, California and Nevada – use and manage this
water to meet agricultural, urban, environmental and industrial
needs is the focus of this tour.
Best Western McCarran Inn
4970 Paradise Road
Las Vegas, NV 89119
This tour explored the Sacramento River and its tributaries
through a scenic landscape as participants learned about the
issues associated with a key source for the state’s water supply.
All together, the river and its tributaries supply 35 percent of
California’s water and feed into two major projects: the State
Water Project and the federal Central Valley Project. Tour
participants got an on-site update of repair efforts on the
Oroville Dam spillway.
Participants of this tour snaked along the San Joaquin River to
learn firsthand about one of the nation’s largest and most
expensive river restoration projects.
The San Joaquin River was the focus of one of the most
contentious legal battles in California water history,
ending in a 2006 settlement between the federal government,
Friant Water Users Authority and a coalition of environmental
groups.
For as long as agriculture has existed in the Central Valley,
farmers have pumped water from the ground to sustain their
livelihood and grow food consumed by much of the nation. This has
caused the ground in certain places to sink, sometimes
dramatically, eliminating valuable aquifer storage space that can
never be restored.
One of the wettest years in California history that ended a
record five-year drought has rejuvenated the call for new storage
to be built above and below ground.
In a state that depends on large surface water reservoirs to help
store water before moving it hundreds of miles to where it is
used, a wet year after a long drought has some people yearning
for a place to sock away some of those flood flows for when they
are needed.
A critical aspect of California’s drive to create new water
storage is in place after the California Water Commission
approved regulations governing how those potential storage
projects could receive public funding under Prop. 1.
The Dec. 14 decision potentially paves the way for new surface
water projects, such as Sites Reservoir, and expansion of Los
Vaqueros reservoir in Contra Costa County.
This 24-page booklet details the conflict between
environmentalists, fish organizations and the Yuba County Water
Agency and how it was resolved through the Lower Yuba River
Accord – a unique agreement supported by 18 agencies and
non-governmental organizations. The publication details
the history and hydrology of the Yuba River, past and present
environmental concerns, and conflicts over dam operations and
protecting endangered fish is included.
This 30-minute documentary, produced in 2011, explores the past,
present and future of flood management in California’s Central
Valley. It features stories from residents who have experienced
the devastating effects of a California flood firsthand.
Interviews with long-time Central Valley water experts from
California Department of Water Resources (FloodSAFE), U.S. Army
Corps of Engineers, Bureau of Reclamation, Central Valley Flood
Management Program and environmental groups are featured as they
discuss current efforts to improve the state’s 150-year old flood
protection system and develop a sustainable, integrated, holistic
flood management plan for the Central Valley.
20-minute version of the 2012 documentary The Klamath Basin: A
Restoration for the Ages. This DVD is ideal for showing at
community forums and speaking engagements to help the public
understand the complex issues related to complex water management
disputes in the Klamath River Basin. Narrated by actress Frances
Fisher.
For over a century, the Klamath River Basin along the Oregon and
California border has faced complex water management disputes. As
relayed in this 2012, 60-minute public television documentary
narrated by actress Frances Fisher, the water interests range
from the Tribes near the river, to energy producer PacifiCorp,
farmers, municipalities, commercial fishermen, environmentalists
– all bearing legitimate arguments for how to manage the water.
After years of fighting, a groundbreaking compromise may soon
settle the battles with two epic agreements that hold the promise
of peace and fish for the watershed. View an excerpt from the
documentary here.
This 30-minute documentary-style DVD on the history and current
state of the San Joaquin River Restoration Program includes an
overview of the geography and history of the river, historical
and current water delivery and uses, the genesis and timeline of
the 1988 lawsuit, how the settlement was reached and what was
agreed to.
This 25-minute documentary-style DVD, developed in partnership
with the California Department of Water Resources, provides an
excellent overview of climate change and how it is already
affecting California. The DVD also explains what scientists
anticipate in the future related to sea level rise and
precipitation/runoff changes and explores the efforts that are
underway to plan and adapt to climate.
Salt. In a small amount, it’s a gift from nature. But any doctor
will tell you, if you take in too much salt, you’ll start to have
health problems. The same negative effect is happening to land in
the Central Valley. The problem scientists call “salinity” poses
a growing threat to our food supply, our drinking water quality
and our way of life. The problem of salt buildup and potential –
but costly – solutions are highlighted in this 2008 public
television documentary narrated by comedian Paul Rodriguez.
A 20-minute version of the 2008 public television documentary
Salt of the Earth: Salinity in California’s Central Valley. This
DVD is ideal for showing at community forums and speaking
engagements to help the public understand the complex issues
surrounding the problem of salt build up in the Central Valley
potential – but costly – solutions. Narrated by comedian Paul
Rodriquez.
20-minute DVD that explains the problem with polluted stormwater,
and steps that can be taken to help prevent such pollution and
turn what is often viewed as a “nuisance” into a water resource
through various activities.
Many Californians don’t realize that when they turn on the
faucet, the water that flows out could come from a source close
to home or one hundreds of miles away. Most people take their
water for granted; not thinking about the elaborate systems and
testing that go into delivering clean, plentiful water to
households throughout the state. Where drinking water comes from,
how it’s treated, and what people can do to protect its quality
are highlighted in this 2007 PBS documentary narrated by actress
Wendie Malick.
A 30-minute version of the 2007 PBS documentary Drinking Water:
Quenching the Public Thirst. This DVD is ideal for showing at
community forums and speaking engagements to help the public
understand the complex issues surrounding the elaborate systems
and testing that go into delivering clean, plentiful water to
households throughout the state.
15-minute DVD that graphically portrays the potential disaster
should a major earthquake hit the Sacramento-San Joaquin Delta.
“Delta Warning” depicts what would happen in the event of an
earthquake registering 6.5 on the Richter scale: 30 levee breaks,
16 flooded islands and a 300 billion gallon intrusion of salt
water from the Bay – the “big gulp” – which would shut down the
State Water Project and Central Valley Project pumping plants.
30-minute DVD that traces the history of the U.S. Bureau of
Reclamation and its role in the development of the West. Includes
extensive historic footage of farming and the construction of
dams and other water projects, and discusses historic and modern
day issues.
Water truly has shaped California into the great state it is
today. And if it is water that made California great, it’s the
fight over – and with – water that also makes it so critically
important. In efforts to remap California’s circulatory system,
there have been some critical events that had a profound impact
on California’s water history. These turning points not only
forced a re-evaluation of water, but continue to impact the lives
of every Californian. This 2005 PBS documentary offers a
historical and current look at the major water issues that shaped
the state we know today. Includes a 12-page viewer’s guide with
background information, historic timeline and a teacher’s lesson.
California’s little-known New River has been called one of North
America’s most polluted. A closer look reveals the New River is
full of ironic twists: its pollution has long defied cleanup, yet
even in its degraded condition, the river is important to the
border economies of Mexicali and the Imperial Valley and a
lifeline that helps sustain the fragile Salton Sea ecosystem.
Now, after decades of inertia on its pollution problems, the New
River has emerged as an important test of binational cooperation
on border water issues. These issues were profiled in the 2004
PBS documentary Two Sides of a River.
This 7-minute DVD is designed to teach children in grades 5-12
about where storm water goes – and why it is so important to
clean up trash, use pesticides and fertilizers wisely, and
prevent other chemicals from going down the storm drain. The
video’s teenage actors explain the water cycle and the difference
between sewer drains and storm drains, how storm drain water is
not treated prior to running into a river or other waterway. The
teens also offer a list of BMPs – best management practices that
homeowners can do to prevent storm water pollution.
This beautiful 24×36 inch poster, suitable for framing, features
a map of the San Joaquin River. The map text focuses on the San
Joaquin River Restoration Program, which aims to restore flows
and populations of Chinook salmon to the river below Friant Dam
to its confluence with the Merced River. The text discusses the
history of the program, its goals and ongoing challenges with
implementation.
This beautiful 24×36-inch poster, suitable for framing, displays
the rivers, lakes and reservoirs, irrigated farmland, urban areas
and Indian reservations within the Klamath River Watershed. The
map text explains the many issues facing this vast,
15,000-square-mile watershed, including fish restoration;
agricultural water use; and wetlands. Also included are
descriptions of the separate, but linked, Klamath Basin
Restoration Agreement and the Klamath Hydroelectric Agreement,
and the next steps associated with those agreements. Development
of the map was funded by a grant from the U.S. Fish and Wildlife
Service.
A companion to the Truckee River Basin Map poster, this
24×36-inch poster, suitable for framing, explores the Carson
River, and its link to the Truckee River. The map includes the
Lahontan Dam and reservoir, the Carson Sink, and the farming
areas in the basin. Map text discusses the region’s hydrology and
geography, the Newlands Project, land and water use within the
basin and wetlands. Development of the map was funded by a grant
from the U.S. Bureau of Reclamation Mid-Pacific Region, Lahontan
Basin Area Office.
This beautiful 24×36-inch poster, suitable for framing, displays
the rivers, lakes and reservoirs, irrigated farmland, urban areas
and Indian reservations within the Truckee River Basin, including
the Newlands Project, Pyramid Lake and Lake Tahoe. Map text
explains the issues surrounding the use of the Truckee-Carson
rivers, Lake Tahoe water quality improvement efforts, fishery
restoration and the effort to reach compromise solutions to many
of these issues.
This 24×36 inch poster, suitable for framing, illustrates the
water resources available for Nevada cities, agriculture and the
environment. It features natural and manmade water resources
throughout the state, including the Truckee and Carson rivers,
Lake Tahoe, Pyramid Lake and the course of the Colorado River
that forms the state’s eastern boundary.
Water as a renewable resource is depicted in this 18×24 inch
poster. Water is renewed again and again by the natural
hydrologic cycle where water evaporates, transpires from plants,
rises to form clouds, and returns to the earth as precipitation.
Excellent for elementary school classroom use.
Fashioned after the popular California Water Map, this 24×36-inch
poster was extensively re-designed in 2017 to better illustrate
the value and use of groundwater in California, the main types of
aquifers, and the connection between groundwater and surface
water.
The 28-page Layperson’s Guide to Water Rights Law, recognized as
the most thorough explanation of California water rights law
available to non-lawyers, traces the authority for water flowing
in a stream or reservoir, from a faucet or into an irrigation
ditch through the complex web of California water rights.
The 24-page Layperson’s Guide to the State Water Project provides
an overview of the California-funded and constructed State Water
Project.
The State Water Project is best known for the 444-mile-long
aqueduct that provides water from the Delta to San Joaquin Valley
agriculture and southern California cities. The guide contains
information about the project’s history and facilities.
The 28-page Layperson’s Guide to Nevada Water provides an
overview of the history of water development and use in Nevada.
It includes sections on Nevada’s water rights laws, the history
of the Truckee and Carson rivers, water supplies for the Las
Vegas area, groundwater, water quality, environmental issues and
today’s water supply challenges.
The Water Education Foundation’s second edition of
the Layperson’s Guide to The Klamath River Basin is
hot off the press and available for purchase.
Updated and redesigned, the easy-to-read overview covers the
history of the region’s tribal, agricultural and environmental
relationships with one of the West’s largest rivers — and a
vast watershed that hosts one of the nation’s oldest and
largest reclamation projects.
The 24-page Layperson’s Guide to Integrated Regional Water
Management (IRWM) is an in-depth, easy-to-understand publication
that provides background information on the principles of IRWM,
its funding history and how it differs from the traditional water
management approach.
The 28-page Layperson’s Guide to Groundwater is an in-depth,
easy-to-understand publication that provides background and
perspective on groundwater. The guide explains what groundwater
is – not an underground network of rivers and lakes! – and the
history of its use in California.
The 24-page Layperson’s Guide to California Water provides an
excellent overview of the history of water development and use in
California. It includes sections on flood management; the state,
federal and Colorado River delivery systems; Delta issues; water
rights; environmental issues; water quality; and options for
stretching the water supply such as water marketing and
conjunctive use. New in this 10th edition of the guide is a
section on the human need for water.
The 24-page Layperson’s Guide to the Central Valley Project
explores the history and development of the federal Central
Valley Project (CVP), California’s largest surface water delivery
system. In addition to the project’s history, the guide describes
the various facilities, operations and benefits the water
project brings to the state along with the CVP
Improvement Act (CVPIA).
The 24-page Layperson’s Guide to the Delta explores the competing
uses and demands on California’s Sacramento-San Joaquin Delta.
Included in the guide are sections on the history of the Delta,
its role in the state’s water system, and its many complex issues
with sections on water quality, levees, salinity and agricultural
drainage, fish and wildlife, and water distribution.
A new look for our most popular product! And it’s the perfect
gift for the water wonk in your life.
Our 24×36-inch California Water Map is widely known for being the
definitive poster that shows the integral role water plays in the
state. On this updated version, it is easier to see California’s
natural waterways and man-made reservoirs and aqueducts
– including federally, state and locally funded
projects – the wild and scenic rivers system, and
natural lakes. The map features beautiful photos of
California’s natural environment, rivers, water projects,
wildlife, and urban and agricultural uses and the
text focuses on key issues: water supply, water use, water
projects, the Delta, wild and scenic rivers and the Colorado
River.
A watershed is the land area that drains snowmelt and rain into a
network of lakes, streams, rivers and other waterways. It
typically is identified by the largest draining watercourse
within the system. In California, for example, the Sacramento River Basin is the
state’s largest watershed.
California’s “Mediterranean”
climate, characterized by
warm, dry summers and mild winters, is considered one of its
great attractions, but it also can be unpredictable with flooding followed by drought and few years of “normal”
precipitation. [See also Hydrologic Cycle].
The Sierra NevadaStretching 450 miles long and up to
50 miles wide, the Sierra Nevada makes up more than a quarter of
California’s land area and forms its largest watersheds,
providing more than half of the state’s developed water supply to
residents, agriculture and other businesses.*
The San Luis Reservoir is the nation’s largest off-stream
reservoir, serving as a key water facility for both the
State Water
Project (SWP) and the federal Central Valley Project
(CVP).
The construction of Glen Canyon Dam
in 1964 created Lake Powell. Both are located in north-central
Arizona near the Utah border. Lake Powell acts as a holding tank
for outflow from the Colorado River Upper Basin States: Colorado,
New Mexico, Utah and Wyoming.
The water stored in Lake Powell is used for recreation, power
generation and delivering water to the Lower Basin states of
California, Arizona, and Nevada.
Dams have allowed Californians and others across the West to
harness and control water dating back to pre-European settlement
days when Native Americans had erected simple dams for catching
salmon.
In 2005, after six years of severe
drought in the Colorado River Basin, federal officials and
representatives of the seven basin states — California, Arizona,
Nevada, New Mexico, Colorado, Utah and Wyoming — began building a
framework to better respond to drought conditions and coordinate
the operations of the basin’s two key reservoirs, Lake Powell and
Lake Mead.
The resulting Interim Guidelines for Lower Basin Shortages and
the Coordinated Operations for Lake Powell and Lake Mead (Interim
Guidelines) identified the conditions for shortage determinations
and details of coordinated reservoir operations. The 2007 Interim
Guidelines remain in effect through Dec. 31, 2025.
California will always be
inextricably linked to its water resources. Water continues
to shape the state’s development and no resource is as vital to
California’s urban centers, farms, industry, recreation, scenic
beauty and environmental preservation.
But California’s relationship to water is also one that continues
to generate controversy.
Applied water refers to water delivered by an application to a
user, either indoors or outdoors. Applied water use typically
occurs in an agricultural or urban setting.
In agriculture, applied water is typically supplied through
irrigation, which uses such devices as pipes and sprinklers.
There are also different types of systems including gravity flow
and pressurized systems.
With soil absorbing applied water and being porous (some water
can move down below a plant’s root zone), it is necessary to
apply more water than a crop might need.
This printed issue of Western Water looks at California
groundwater and whether its sustainability can be assured by
local, regional and state management. For more background
information on groundwater please refer to the Foundation’s
Layperson’s Guide to Groundwater.