California would not exist as it does today were it not for the
extensive system of levees, weirs and flood bypasses that have
been built through the years, particularly in the Sacramento-San
Joaquin Delta.
… The fear of flooding has steadily faded in Sacramento
because of what happened after the great storms of 1986.
Sacramento came together and created flood control protections,
arguably the most effective regional government effort in local
history. And now, some $5 billion in flood protection
improvements later, Sacramento is almost ready for much bigger
storms. Still, this region does not take flooding as seriously
as it should. Public attention is far more focused on how a
warming climate increases the risk of wildfires and heat waves.
But hotter temperatures are also creating more vapor in the
atmosphere, a flood waiting to happen. –Written by Sacramento Bee columnist Tom Philp.
U.S. Sen. Alex Padilla announced Tuesday that he and Sen. Adam
Schiff secured $54 million in federal funding for the Pajaro
River Flood Risk Management Project, aimed at strengthening
flood protection for Watsonville and Pajaro. The funding will
go toward reconstructing failing levees along the Pajaro River
and its tributaries in Monterey and Santa Cruz counties,
according to Padilla’s office. The project is intended to
reduce flood risk for residents, businesses and infrastructure
in the low-lying communities. … Problems with the aging
levee have plagued the region for years, overtopping its banks
and allowing devastating floods in 1955, 1995 and 1997. Some
3,000 properties lie in the floodplain.
… The Pajaro River Flood Risk Management Project, a joint
effort of the U.S. Army Corps of Engineers and the Pajaro
Regional Flood Management Agency, was created in 2021 and seeks
to both better protect homes and cede some of the historic
floodplain back to the river. One solution has been to knock
down old levees and construct new ones further from the
riverbed — in some areas, more than a football field’s length
away. Besides flood protection, the expanded riverbanks
are designed to provide new habitat for riparian plants and
animals, and let water seep into the soil to replenish
groundwater aquifers. Groundwater basins in the county,
including the Mid-County and Pajaro Valley basins are
critically overdrafted and at risk of saltwater intrusion if
not refilled.
Senator Adam Schiff announced $54 million in federal funding
for the Pajaro River Flood Risk Management Project in Monterey
and Santa Cruz counties to increase flood protection by
rebuilding and strengthening failing levees. The new federal
investment will enhance flood protection by reconstructing
levees along the Pajaro River, which breached in 2023, flooding
Pajaro and surrounding areas and forcing thousands to evacuate
their homes. The federal funding aims to make critical
improvements to mitigate flood risk and protect residents, the
local economy, and infrastructure in the region.
On Jan. 3rd, low-lying areas of Marin County were hit with
massive flooding from an unexpectedly high king tide.
Some say it is a preview of what will become common as sea
levels rise. And the city of San Rafael isn’t waiting for it to
become a reality to try and protect its most vulnerable
neighborhood. … The first proposal, Alternative 1, is to
raise all the edges of the creek, increasing the height of the
banks and flood walls. … Alternative 2 is to raise the outer
banks and add a gate at the end that can be closed when the
tide gets too high. That would cost more, but with sea level
rise projections, might only be effective until about the year
2050. Finally, Alternative 3 is a complete renovation of
the Canal District shoreline, removing about 550 existing homes
and raising the land high enough to safely redevelop on top of
it.
The Marysville ring levee project started in 2010. Now, the
U.S. Army Corps of Engineers is nearing completion of the
project. Engineers are submitting for federal certification.
… By federal standards, the project is done. FEMA
requires a one-in-100-year level of protection. But the state
of California requires a 200-year level protection. … ”I
think it’s especially important for Marysville because it’s at
the confluence of two major rivers, Feather River and Yuba
River, which has been the focal point of devastating floods
over the last century or so,” said Ryan McNally, the director
of water resources and flood risk reduction with Yuba Water
Agency.
… Over the first few days of the year, water levels in the
San Francisco Bay Area hit record highs as the winter storms
collided with king tides. Marin County, one of the
hardest-hit areas, tallied over $4.3 million in
damage from coastal and inland flooding across its central and
southern zones, including a costly levee failure.
… Efforts to upgrade Santa Venetia’s levee
infrastructure, estimated to cost $25 million, have stalled for
years due to a variety of funding issues, including lukewarm
community support for a parcel tax. The county is still seeking
federal, state and local funding to build a new
floodwall. In order to conduct the project, the county
also still needs to purchase easements from all the people with
bordering properties.
… Climate scientists have long warned that when storms
ride on top of high tides, bayside Marin County will flood and
cause chaos, especially in low-lying areas like San Rafael.
… Flooding experts predict that the changing climate
will turn today’s king tides into the everyday tides of the
future. They want Marin County to learn from the recent
disaster and to install better pumps, engineer new seawalls and
even pilot out-of-the-box ideas like floating homes.
… The city’s flatlands are shaped like a bowl, protected
by makeshift levees — some constructed with plywood, cement or
asphalt — and pumps that are already struggling.
Marin County supervisors voted Tuesday to ratify a local
emergency proclamation over the widespread flooding early this
month. “The proclamation provides for and preserves eligibility
for state and federal funding and supports our ongoing
recovery, reimbursement and mitigation efforts,” County
Executive Derek Johnson told supervisors during their first
meeting of the year. Johnson said the county is still assessing
the cost of the damage in the unincorporated areas, but the
preliminary estimate is about $3.5 million. “Our major cost
drivers are impacts to levees, roads and bridges as well as
damage to park and recreation facilities,” Johnson said.
The 24-page Layperson’s Guide to the Delta explores the competing
uses and demands on California’s Sacramento-San Joaquin
Delta. The 11th edition examines this critical
water hub and its myriad challenges. The 2025 version
includes the latest information on the tunnel project, habitat
restoration efforts, climate change impacts and an updated
section on the legal and political facets of the Delta.
Land and waterway managers labored
hard over the course of a century to control California’s unruly
rivers by building dams and levees to slow and contain their
water. Now, farmers, environmentalists and agencies are undoing
some of that work as part of an accelerating campaign to restore
the state’s major floodplains.
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.
Many of California’s watersheds are
notoriously flashy – swerving from below-average flows to jarring
flood conditions in quick order. The state needs all the water it
can get from storms, but current flood management guidelines are
strict and unyielding, requiring reservoirs to dump water each
winter to make space for flood flows that may not come.
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.
Farmers in the Central Valley are broiling about California’s plan to increase flows in the Sacramento and San Joaquin river systems to help struggling salmon runs avoid extinction. But in one corner of the fertile breadbasket, River Garden Farms is taking part in some extraordinary efforts to provide the embattled fish with refuge from predators and enough food to eat.
And while there is no direct benefit to one farm’s voluntary actions, the belief is what’s good for the fish is good for the farmers.
Along the banks of the
Sacramento-San Joaquin Delta in Oakley, about 50 miles southwest
of Sacramento, is a park that harkens back to the days when the
Delta lured Native Americans, Spanish explorers, French fur
trappers, and later farmers to its abundant wildlife and rich
soil.
That historical Delta was an enormous marsh linked to the two
freshwater rivers entering from the north and south, and tidal
flows coming from the San Francisco Bay. After the Gold Rush,
settlers began building levees and farms, changing the landscape
and altering the habitat.
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.
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 24-page Layperson’s Guide to Flood Management explains the
physical flood control system, including levees; discusses
previous flood events (including the 1997 flooding); explores
issues of floodplain management and development; provides an
overview of flood forecasting; and outlines ongoing flood control
projects.
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.
With the dual threats of aging levees and anticipated rising sea levels,
floodplains — low
areas along waterways that flood during wet years — are
increasingly at the forefront of many public policy and water
issues in California.
Adding to the challenges, many floodplains have been heavily
developed and are home to major cities such as Sacramento. Large
parts of California’s valleys are historic floodplains as well.
Roughly 1,115 miles of levees protect farms, cities, schools and
people in and around the Sacramento-San Joaquin
Delta, a crucial conduit for California’s overall water
supply. But the Delta’s levees are vulnerable to failure due to
floods, earthquakes and rising sea levels brought about by
climate change. A widespread failure could imperil the state’s
water supply.
California would not exist as it does today were it not for the
extensive system of levees, weirs and flood bypasses that have
been built through the years, particularly in the Sacramento-San Joaquin
Delta.
These levees have been in place dating back to 1850, when
California first joined the union.
This issue of Western Water looks at the BDCP and the
Coalition to Support Delta Projects, issues that are aimed at
improving the health and safety of the Delta while solidifying
California’s long-term water supply reliability.
This printed issue of Western Water examines the issues
associated with the State Water Board’s proposed revision of the
water quality Bay-Delta Plan, most notably the question of
whether additional flows are needed for the system, and how they
might be provided.
This printed issue of Western Water discusses several
flood-related issues, including the proposed Central Valley Flood
Protection Plan, the FEMA remapping process and the dispute
between the state and the Corps regarding the levee vegetation
policy.
Levees are one of those pieces of engineering that are never
really appreciated until they fail. California would not exist as
it does today were it not for the extensive system of levees,
weirs and flood bypasses that have been built through the years.
This printed copy of Western Water examines the Delta through the
many ongoing activities focusing on it, most notably the Delta
Vision process. Many hours of testimony, research, legal
proceedings, public hearings and discussion have occurred and
will continue as the state seeks the ultimate solution to the
problems tied to the Delta.
This printed copy of Western Water examines climate change –
what’s known about it, the remaining uncertainty and what steps
water agencies are talking to prepare for its impact. Much of the
information comes from the October 2007 California Climate Change
and Water Adaptation Summit sponsored by the Water Education
Foundation and DWR and the November 2007 California Water Policy
Conference sponsored by Public Officials for Water and
Environmental Reform.
This issue of Western Water examines the extent to
which California faces a disaster equal to or greater than the
New Orleans floods and the steps being taken to recognize and
address the shortcomings of the flood control system in the
Central Valley and the Delta, which is of critical importance
because of its role in providing water to 22 million people.
Complicating matters are the state’s skyrocketing pace of growth
coupled with an inherently difficult process of obtaining secure,
long-term funds for levee repairs and continued maintenance.
This issue of Western Water analyzes northern California’s
extensive flood control system – it’ history, current concerns,
the Paterno decision and how experts are re-thinking the concept
of flood management.
