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Developing ‘Super’ El Niño Could Match California’s Great Deluge of 1997-98

Current El Niño conditions appear likely to become comparable to the “great” El Niño of 1997-98, according to an experimental prediction system used by the National Science Foundation’s National Center for Atmospheric Research.

“Our forecast system has shown that it can do a remarkably good job of accurately hindcasting past El Niño events when we’ve tested it using historical data, which gives us high confidence in this forecast,” said NCAR scientist Stephen Yeager, who helped lead the modeling effort.

The Southwest US Monsoon Was Strange. Phoenix Was Record Dry, but California and Nevada Were Soaked

The Southwest monsoon has wrapped up, and it featured a weird split of record dry conditions in parts of Arizona and soaking rain, including from the remnants of a former hurricane in California, Nevada and other states.

Report: Grand Canyon Groundwater May Increase in a Warmer Climate

To understand where you’re going, you have to know where you’ve come from. That’s the idea researchers were pursuing with the recent geochemical analysis of a single stalagmite from a cave in Grand Canyon National Park.

More specifically, they measured the ratio of stable isotopes in calcite deposits within the stalagmite to help predict how the volume of groundwater aquifers may be affected by a warming climate.

Reliable Water Supplies Make San Diego Region Well-Prepared for 2024

Thanks to a decades-long supply diversification strategy and continued efficient use of water across the region, the San Diego County Water Authority announced today that the region has reliable supplies to meet demands in Water Year 2024, which started Oct. 1.

Hydrologists use Oct. 1 to begin measuring the snow and rain that will help carry water users through dry summer months the following calendar year. This fall, El Niño conditions continue to strengthen and could bring above-average precipitation to Southern California.

Reclamation Planning Conference attendees visit the Sweetwater Authority Reynolds Desalination Plant. Photo: US Bureau of Reclamation

Bureau of Reclamation Group Visits South Bay Water Agencies

A planning and training workshop for 100 U.S. Bureau of Reclamation employees in San Diego County included tours of Sweetwater Authority and Otay Water District facilities.

The Reclamation employees visited San Diego in September to participate in a planning training workshop. The Bipartisan Infrastructure Law and the Inflation Reduction Act have brought significant funding in support of Reclamation’s mission to manage, develop, and protect water and related resources in an environmentally and economically sound manner in the interest of the American public. Planning provides critical support for Reclamation’s leadership when making investment decisions.

U.S. Bureau of Reclamation employees share their experiences and lessons learned during their recent San Diego visit. Photo: US Bureau of Reclamation

U.S. Bureau of Reclamation employees share their experiences and lessons learned during their recent San Diego visit. Photo: U.S. Bureau of Reclamation

The goal of this workshop was to provide training and resources for planners and project managers involved in studies to evaluate federal investments in water resources. In addition to promoting planning expertise across Reclamation, the Planning Training Workshop also served to share experiences and lessons learned with other planners and project managers.

Key topics at this event included the Federal planning process, technical, environmental, economic, and financial feasibility, and climate change. A key benefit of the trip was the opportunity to connect with regional partners, including tours of the Sweetwater Authority Reynolds Groundwater Desalination Facility in Chula Vista and the Otay Water District binational pipeline on the U.S./Mexico border.

Building skills and relationships

Reclamation Planning Conference attendees tour the U.S./Mexico border. Photo: US Bureau of Reclamation

Reclamation Planning Conference attendees tour the U.S./Mexico border. Photo: U.S. Bureau of Reclamation

“We were thrilled to bring together so many Reclamation employees to discuss how water resources planning can help meet the increasingly challenging, complex, and diverse needs for water and power now and into the future,” said Karl Stock, manager of the Reclamation Law Administration Division.

“It was a pleasure to host such a talented team of water professionals from the Bureau of Reclamation at our award-winning Reynolds Groundwater Desalination Facility and share with them the critical role our facility plays in providing a drought-proof, sustainable water supply for Sweetwater Authority customers,” said Carlos Quintero, Sweetwater Authority general manager.

Bureau of Reclamation funding supports regional expansion project

The Richard A. Reynolds Desalination Facility is a state-of-the-art groundwater desalination facility Photo: Sweetwater Authority Best Tasting Water Award

The Richard A. Reynolds Desalination Facility is a state-of-the-art groundwater desalination facility Photo: Sweetwater Authority

The Richard A. Reynolds Groundwater Desalination Facility uses reverse-osmosis treatment (R/O) to remove dissolved salts and microscopic particles, such as bacteria and other contaminants that could be found in alluvial groundwater. The R/O process water is treated to prevent corrosion and chlorine and ammonia are added to further assure disinfection.

The desalination facility began operating in 1999 drawing brackish groundwater from five wells. In 2017, the facility was expanded to include installation of three additional reverse osmosis trains, a new iron and manganese treatment system, the drilling of five new brackish groundwater wells, the installation of 23,000 feet of pipe, and additional system upgrades. The $42 million expansion project was made possible by significant grant funding from the U.S. Bureau of Reclamation and the State of California.

The facility now has a full production potential of 10 million gallons of drinking water per day, enough for approximately 18,000 families, and provides Sweetwater Authority customers with about 30% of their annual water supply. The sustainable design of the plant also includes 2,950 ground-mounted solar PV panels as an alternative energy source. The solar array offsets the cost of treating water and reduces the facility’s overall carbon footprint.

(Editor’s note: The Sweetwater Authority and the Otay Water District are two of the San Diego County Water Authority’s 24 member agencies that deliver water across the metropolitan San Diego region.)

Wettest, Wildest, Weirdest Rainy Season in Nearly 20 Years Comes to End in San Diego County

From the backcountry of Campo to the back roads of Ramona, firefighters were ready to roll last fall at even the hint of wildfire.

Two years of below-average rain and high temperatures had left the landscape parched. Something as small as heat from a car muffler could be enough to ignite grass. Firefighters described the region as primed to burn.

Colorado River Officials to Expand Troubled Water Conservation Program in 2024

Colorado River officials plan to expand a conservation program next year that pays farmers and ranchers to use less water. But questions remain about some of the proposed ideas and the program’s overall efficacy.

The state initially launched the System Conservation Pilot Program in 2015 as a part of a multistate effort to conserve water from the Colorado River, which provides water for millions of residents throughout seven states as well as Mexico. The effort was designed to see if conservation efforts could stabilize the water levels in critical reservoirs along the river, like Lake Powell.

Pamphlets Sent to Voters Ahead of District 4, Water Separation Special Elections

Information pamphlets have been sent out to registered voters for the upcoming special elections on Nov. 7, including the District 4 supervisor runoff.

Voters who live in the Fourth Supervisorial District, City of Chula Vista, Fallbrook Public Utility District and Rainbow Municipal Water District will be receiving the pamphlet in the next few days, county officials say.

How Much Rainfall Has San Diego County Had This Water Year?

San Diego County has seen its fair share of storms over the last year, bringing historic levels of rainfall to the region.

After the driest three-year period on record, California has been battered by extensive precipitation, between a series of unrelenting atmospheric rivers that hit last winter and more recently, Tropical Storm Hilary.

A Very Wet Year for San Diego

San Diego’s water year ends Saturday — and it will be recorded as the 14th wettest year on record for the city.

A recorded 15.72 inches of rain fell at the San Diego Airport over the past 12 months. The weather station there typically sees about 9.5 inches a year.

It was the wettest year ever on Palomar Mountain. Rainfall there totaled 69.24 inches.