The San Joaquin River, which helps drain California’s Central
Valley, has been negatively impacted by construction of dams,
inadequate streamflows and poor water quality. Efforts are now
underway to restore the river and continue providing agricultural
lands with vital irrigation, among other water demands.
After an 18-year lawsuit to restore water flows to a 60-mile dry
stretch of river and to boost the dwindling salmon populations,
the San Joaquin River Restoration Settlement is underway.
Water releases are now used to restore the San Joaquin River and
to provide habitat for naturally-reproducing populations of
self-sustaining Chinook salmon and other fish in the San Joaquin
River. Long-term efforts also include measures to reduce or avoid
adverse water supply impacts from the restoration flows.
The Sacramento-San Joaquin Delta is hitched to so many things.
Our estuary is a critical habitat for fish and wildlife, home
to millions of people, and the hub of our state’s water
delivery system. From the Sierra Nevada to the mouth of the San
Francisco Bay, what happens in one part of the Delta watershed
affects the entire estuary.
The city’s fate is linked inextricably with the San Joaquin
River… Much of the water upstream is diverted for
agriculture, although a legal settlement ensures that the river
no longer runs dry. Additional diversions at the downriver end
… greatly reduce the amount of water that actually makes it
through the Sacramento-San Joaquin River Delta, the San
Francisco Bay and then the Pacific. It is as if one of the
state’s two great arteries … is detached from its heart.
By looking at how to manage levels of salt, mercury and
nutrients heading into the San Joaquin River, researchers are
aiming to boost water quality and reduce impacts on fish and
other aquatic life in the Sacramento-San Joaquin River Delta.
… The project will examine wetlands — about 40 miles
southwest of UC Merced’s campus — that drain into the San
California is chock full of rivers and creeks, yet the state’s network of stream gauges has significant gaps that limit real-time tracking of how much water is flowing downstream, information that is vital for flood protection, forecasting water supplies and knowing what the future might bring.
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.
The health of North America’s largest estuary, the San
Francisco Estuary, is showing some signs of improvement, but
much of the historic damage caused to the massive watershed has
either not improved or worsened, according to a new report.
A staggering number of Chinook salmon are returning to a
California river that hasn’t sustained salmon for decades due
to agricultural and urban demands, giving biologists hope that
threatened fish are finally spawning in their native
grounds without human help.
A project to restore a portion of Brentwood’s Marsh Creek got a
big boost with a new $1.4 million U.S. Environmental Protection
Agency grant. … The Three Creeks Parkway Restoration project
aims to improve the creek’s floodplain, provide quality habitat
for Chinook salmon and Swainson’s Hawk as well as expand
recreational opportunities in the area.
When you walk through Jeannie Williams’s sunny orchard, you
don’t notice anything wrong. But the problem’s there,
underfoot. The land around her — about 250 square kilometres —
is sinking. “It’s frightening,” Williams says. “Is the land
going to come back up? I don’t know.”
The Sacramento–San Joaquin Delta has more non-native species
than native ones, and its estuary is considered the most
invaded in the world. We talked to Jim Cloern—an emeritus
scientist with the US Geological Survey and an adjunct fellow
at the PPIC Water Policy Center—about this challenge.
Something is amiss on Sherman Island, a whale-shaped swath of
farm and grazing land at the confluence of the Sacramento and
San Joaquin rivers. If you don’t know what ails the place, it
might be hard to pinpoint the problem.
At the Association of California Water Agencies‘ spring
conference, a panel of lawyers covered the basics of the legal
framework for the Delta. The panel was billed as ‘All the
Acronyms You Need to Know”, but no 1.5 hour panel discussion
could possibly cover all that. However, the panel did a good
job of hitting the main ones and highlighting current issues.
In March, newly-elected Senator Melissa Hurtado (D-Sanger)
proposed a $400 million windfall to finance repairs for the
canal under Senate Bill 559… But the bipartisan bill, much
like canal it was designed to fix, is sunk — for now. The bill
failed to reach the Senate floor for a vote before the Sept. 13
The Friant-Kern Canal, which delivers water to farms and
communities on the east side of the Valley, is literally
sinking in some areas due to groundwater pumping. And with one
week to go before the California legislature wraps up its 2019
session, many hope the state will help fund the canal’s repair.
A 10-acre island in Isleton, an hour south of Sacramento in the
California Delta’s fresh-water Seven Mile Slough, is changing
hands for $1.195 million. (SF’s median condo price is about
$1.25 million.) The buyer is Thai Tran, who owns a mini-chain
of Vietnamese pho restaurants in Sacramento, and listing agent
Tony Wood of KW Commercial says Tran and his family plan to
transform the property into a destination.
As the old saying goes, if you can’t go through something, go
around it. And at an estimated cost of $357 million, the Friant
Water Authority is contemplating a 30-mile parallel canal to
circumvent the portion of the Friant Kern Canal that has been
negatively affected by subsidence.
The small channel island near Brannan Island can be found about
one hour south of Sacramento in the Delta’s fresh-water Seven
Mile Slough, in Sacramento County. The marina and resort have
been in operation for more than 60 years.
What Public Works Director Mark Houghton touts as “Manteca’s
own refinery” is now converting methane gas generated at the
wastewater treatment plant along with food waste to produce
compressed liquefied gas. And in doing so, Manteca is well on
its way to effectively wiping out all CO2 impacts the
wastewater treatment process creates and then some.
Friant Water Authority is conducting geotechnical
investigations this summer along the outer banks of the
Friant-Kern Canal in southern Tulare County to determine if the
soil may support construction of a second canal running
parallel to the first. The reason for the research is the
capacity of this key, eastside Valley canal has been reduced
60% due to land subsidence caused by years of vigorous
groundwater pumping …
Ariel Rubissow Okamoto, the editor in chief of Estuary Magazine
and long-time Bay Area science writer, talks about the
resiliency of the largest estuary on the West Coast, the
challenges facing the Sacramento–San Joaquin Delta, and the
potential impacts of climate change and sea-level rise on the
San Francisco Bay.