Study Indicates Human-caused Dust Events are Linked to Fallow Farmland

University of California – Merced
“Idled farmland and dust are particularly concentrated in Kern, Fresno and Kings counties, where annual crops such as wheat, corn, and cotton are fallowed as part of agricultural practices or a combination of water and economic decisions,” said Abatzoglou, a climatologist in the Department of Management of Complex Systems in the School of Engineering. “When fields are unplanted, wind erosion can create dust.”

Dust can be laced with chemicals and pathogens that cause severe respiratory illnesses or death. For example, Valley fever, caused by a fungus, relies on dust to spread. Particulate matter has also been linked to various forms of dementia, cardiovascular problems, COPD, asthma, and perhaps surprisingly, longer and more painful menstrual cycles. Vulnerable groups disproportionately bear these health impacts.

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Snow is melting rapidly in parts of the West. Here’s why

San Francisco Chronicle
Nyland Property is seen with dry brush on hills during the California Central Coast Prescribed Fire Training Exchange (Cal-TREX) burn in San Juan Bautista (San Benito County) on June 4, 2023.

The western U.S. is experiencing a late-season snow drought, according to an update Wednesday by the National Oceanic and Atmospheric Administration’s National Integrated Drought Information System. The diminished snowpack could result in water supply issues and increased wildfire risk in the coming months, the authors wrote.

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Dust is a Danger to Central Valley Health and Will Likely Get Worse, Researchers Find

ucmerced.edu
People don’t think about dust much until it’s time to clean the house, but a new report by UC researchers could raise awareness of the growing threat of dust and dust storms.

Dust affects everything from cardiovascular and brain health to traffic collisions and agricultural yield. “Beyond the Haze: A UC Dust Report on the Causes, Impacts, and Future of Dust Storms in California” details the wide-ranging impacts of dust on health, public safety, the environment and California’s economy.

Read the full article at ucmerced.edu

Field-scale mapping of California crop water productivity to inform water management in critically overdrafted groundwater basins

researchgate.net
Crop water productivity metrics can reveal how the dynamics of crop production and water use change across space and time. We use field-scale satellite inputs from 2016-2021 to estimate potential water savings for four crops (almonds, grapes, walnuts, and citrus—which collectively account for approximately one-third of California’s cropland area), within critically overdrafted groundwater sub-basins of California’s San Joaquin Valley. These annual estimates of field-level water savings potential are based on locally achievable crop water productivity (CWP) values for each crop type. Our findings show considerable spatial variation in CWP and potential water savings within each sub-basin. We find that increasing CWP to peak efficiency (defined as improving fields to the 95th percentile of observed CWP) for four crops could meet up to 36% of the estimated annual overdraft in San Joaquin Valley. For comparison, fallowing 5% of the four crop type fields in the same study area could potentially reduce annual overdraft by 11%. By delivering results at the field scale, our work can inform targeted interventions by irrigation district managers and more efficient allocation of state incentives for improved water management. For example, we estimate that state grant funding for water efficiency upgrades could have amplified potential water savings threefold by targeting investments to the least efficient fields.

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Bring Back the Kern v. City of Bakersfield: Surface vs. Groundwater Regulation Post-SGMA

californiaglobe.com
Introduction, Bring Back the Kern v. City of Bakersfield

The California Court of Appeal’s recent decision in Bring Back the Kern v. City of Bakersfield, 2025 WL 984395 (BBK), provides an instructive lens for understanding the evolving interplay between surface water diversions and groundwater regulation under the Sustainable Groundwater Management Act (SGMA). Although BBK was not decided specifically on SGMA grounds—focusing instead on Fish and Game Code § 5937 and constitutional reasonable use principles—it has significant implications for Groundwater Sustainability Agencies (GSAs) as they implement Groundwater Sustainability Plans (GSPs). Bring Back the Kern v. City of Bakersfield notably underscores the constitutional requirement of reasonableness, which must inform all water uses, including groundwater recharge. This article explores Bring Back the Kern v. City of Bakersfield’s key holdings and analyzes their potential impact on future groundwater management strategies under SGMA.

Read the full article at californiaglobe.com

A major California city wants to revive its dry river. It’s not easy

San Francisco Chronicle
The Kern River, shown passing near Panorama Park in Bakersfield, is one of the southernmost rivers in the Sierra Nevada. A group of Bakersfield residents is seeking to replenish it as a centerpiece for the community.
Scott Strazzante/S.F. ChronicleFor decades, residents of Bakersfield have lived with a river that’s little more than a channel of dust.
The Kern, which pours from the snowy peaks of the southern Sierra, descends upon California’s ninth-largest city and, in all but the wettest of years, runs dry. A sandy, weed-strewn corridor is left winding unremarkably through the downtown, beside roads, beneath bridges and behind businesses.
“Any major city that has a river or that sort of thing, they try to take advantage of it and make it an asset rather than an eyesore,” said Bill Cooper, who grew up near the Kern and has lived in Bakersfield most of his life. “A river can really add to a community. But nobody wants to live in our crappy town. Unfortunately, Bakersfield has that reputation.”
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A group of residents is trying to change that. Cooper and dozens of others are fighting to bring water back to the Kern River, hoping to create a lush, parklike centerpiece in a city best known for the sunbaked oil fields and farms that surround it.
It isn’t an easy go. The river’s waters are already largely accounted for, some serving the municipal needs of Bakersfield and nearby communities, but most drawn for agriculture, the engine of the regional economy. Keeping more water in the river could mean less for growing almonds, oranges, grapes and more than 200 other crops. Many fear that food supplies, jobs and income stand to be lost, and they’re pushing back.
“To just say ag is using all the water and we need to change that, you’re ignoring decades of history and how this came about,” said Edwin Camp, a third-generation grower outside Bakersfield who has staked his livelihood on the promise of Kern River water. “It scares me. What are we supposed to depend on?” 
The fight over the river is coming to a head this year in the courts. The dispute pits Bakersfield residents, organized under the banner Bring Back the Kern, and a slate of environmental organizations against the water users: the 413,000-person city and a handful of agricultural water districts.
The California Attorney General’s Office also joined the fray recently, intervening on behalf of the residents. The state is concerned that a judgment that fails to restore water to the Kern could open the door to challenges to flow protections on other rivers similarly burdened by overuse and, increasingly, the warming climate.
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Initially, the residents and their allies won a tentative decision that showed promise for their cause. In 2023, after the river unexpectedly swelled during one of the wettest winters in a half-century, a Kern County Superior Court judge issued a preliminary injunction that obligated the city to keep water in the river to safeguard fish, at least until the trial plays out.
But that order was reversed this month by an appeals court. The three-judge panel found that the lower court had not evaluated broader impacts when it made the preliminary decision about the river water, including harm caused to urban and agricultural water supplies, as required by the state Constitution. Attorneys for the city and water districts praised the ruling as a validation of the long-standing interests on the river.
A trial for the case is scheduled for December. Should the proceedings go forward, attorneys for Bring Back the Kern and their partners are expected to argue that draining the river is a violation of California’s public trust doctrine. The doctrine asserts that certain natural resources must be preserved for the public good.
The public trust issue, which is not new to the water world, was perhaps most famously taken up at Mono Lake, where the courts ruled decades ago that the headwaters of the ecologically prized basin couldn’t be entirely siphoned off for thirsty communities in Southern California.
Each public trust case is different, however, and historically, judges have given deference to commerce, including farming. Both environmentalists and water suppliers statewide are watching closely to see how the matter unfolds on the Kern.
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The Mohawk Street bridge goes over the Kern River in Bakersfield, where the river usually runs dry.
Scott Strazzante/S.F. Chronicle
A Bakersfield beachThe Kern River is one of the southernmost rivers in the Sierra Nevada, with headwaters near the base of 14,500-foot Mount Whitney.
The river’s 165-mile course runs unfettered through remote forests and canyons before hitting the dam at Lake Isabella and dropping sharply into the flatlands of the San Joaquin Valley. There, draws on the river provide nearly a third of the surface water that fuels Kern County’s $8 billion of annual crop production — among the most of any California county.
In the past, the waterway continued through Bakersfield to the now dried-up Buena Vista Lake on the valley floor. Since the late 1800s, however, increasing water diversions reduced the flow in its lower reaches. Now there is virtually none.
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“We once had a Bakersfield Beach,” said Rich O’Neil, who grew up in the city in the 1940s and ’50s and remembers year-round flows on the Kern through the downtown. “People would sunbathe, swim, fish. There were places to kayak and canoe.”
In the 1970s, when O’Neil joined fellow Bakersfield resident Bill Cooper to spearhead a bike path along the city’s riverfront, the water had already stopped flowing through town. During the early construction of what would become the Kern River Parkway, with a 30-mile-plus bicycle path, volunteers carried in buckets of water — in lieu of river water — to keep the trees alive.
“We were told by city water people they were trying to get water in the channel,” Cooper said. “We believed them. We were young.”
Since 1976, the city of Bakersfield has owned and operated several diversion dams, or weirs, along the river, each of which steers water into canals. About 25% of the water goes to the city and the rest to agricultural water districts. The districts have either longtime water rights on the Kern or contract with the city for supplies.
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Read the full article at San Francisco Chronicle