The long-term drought and effects of climate change means more trouble for the millions of people that depend on the Colorado River.
In a statement released in early April, the Arizona Department of Water Resources, and the Central Arizona Project state that they expect the first-ever shortage declaration for the river in 2022, meaning substantial cuts to Arizona’s share of the water supply.
Scientists have few categories at their disposal to describe droughts, which are more complex than mere shortages of precipitation or surface water. For example, some local shortages can be invisible, as when water is transferred into a dry area from a distant source. Other shortages are chronic, with communities continuously requiring more water than is available, even in wet years. Some water shortages occur when water quality becomes so degraded that even though there may be plenty of water available, little of it is usable. With such variation in conditions, scientists need better language to conceptualize droughts.
The California State Water Resources Control Board Friday urged people and their pets to avoid the water in the Salton Sea due to a toxic algae outbreak.
Officials said that patches of toxic cyanobacteria have been discovered at numerous sites in the sea, and a dog recently died after swimming in the water.
The U.S. Supreme Court on Monday instructed the Imperial Irrigation District to submit a response to California farmer Michael Abatti’s request that their longstanding legal battle be taken up by the nation’s highest court.
Scott Harris, clerk of the Supreme Court, wrote to Jennifer Meeker, an attorney for the water and power district, to say that even though IID didn’t feel the need to answer Abatti’s petition, “the Court nevertheless has directed this office to request that a response be filed.”
Vicente Calderon from Tijuana Press and I spend a lot of time picking our way around the sewage-laden Tijuana River, asking ourselves: How is it still this bad? Our latest story from the cross-border sewage crisis plaguing Tijuana and San Diego illuminated that the current approach to solving the problem is a lot like putting a Band-Aid on the stomach flu. The Band-Aid in this case is $300 million that Congress has charged the Environmental Protection Agency with deciding how to spend. But really, and here’s the flu part of the allegory, a lot of Tijuana’s infrastructure is just old and broken, or was never even built to support the neighborhoods that popped up on its hillsides.
Climate change and drought will impact San Diego County’s climate future, but regional water supply planning and adaptation measures will ensure a safe, reliable supply for the region.
Water supply strategy was one of the key points participants learned about during a Monday panel discussion, “San Diego County’s Climate Future,” hosted online by the San Diego County Water Authority, Citizens Water Academy, Leaders 20/20 and San Diego Green Drinks.
Panel moderator Kelley Gage, Water Authority Director of Water Resources, kicked off the climate conversation by describing the investments and steps taken by the Water Authority and its 24 member agencies to secure the region’s water future.
“Since our founding more than 75 years ago, our mission in partnership with our 24 member agencies is to ensure a clean and reliable supply of water for the region,” said Gage. “As part of that mission we’re involved in partnerships like the one that we have today and the research to ensure that we have planned for the impact of climate change in our water supplies.”
Gage said the Water Authority has developed a climate action plan.
“As part of our strategic planning we have developed a climate action plan which is an interdisciplinary effort to promote and coordinate implementation of climate change strategies and related activities across the Water Authority,” said Gage. “We have reached our goals for 2020 and we are on track for our 2030 goals.”
The Water Authority partnered with the Scripps Institution of Oceanography, Center for Wester Weather and Water Extremes, at UC San Diego in 2020 to better predict atmospheric rivers and improve water management before, during, and after those seasonal storms. The Center and its partners share best practices in forecast-informed reservoir operations, increased research around atmospheric rivers and droughts, and develop strategies for mitigating flood risk and increasing water supply reliability.
Marty Ralph, Researcher in Climate, Atmospheric Science & Physical Oceanography at Scripps Institution of Oceanography, and Director of the Center for Western Weather and Water Extremes, opened the panel with information on advanced research around atmospheric rivers.
Atmospheric rivers are long narrow bands of airborne water vapor, providing up to half the annual precipitation and mountain snow that is key to California’s water supply. New research allows reservoir operators to use atmospheric river forecasts to better predict storm events and prevent unnecessary stored water releases.
“This stored water has helped to cope with the third driest year on record for the region,” said Ralph.
Another Scripps Institution of Oceanography researcher, Alexander “Sasha” Gershunov, said that California receives most the country’s extreme precipitation events due to atmospheric rivers. Low and medium intensity precipitation events are predicted to decrease, while high intensity precipitation events are predicted to increase, especially in California.
“With warming, atmospheric rivers get stronger, wetter, longer, and more impactful, and they also produce more of our annual precipitation total,” said Gershunov. “There are many implications of these changes from water resources management, to wildfires, to debris flows.”
Darbi Berry, Program Manager at the San Diego Regional Climate Collaborative, described projects moving forward in the region to address equity issues related to water availability and pollution. Advancing the Nexus of Water and Equity looks at how different communities are impacted by a changing climate.
Increased variability in rainfall events and the potential for flooding in the San Diego region is a contributing factor to ongoing water quality issues in disadvantaged neighborhoods. One project carried out to address these equity issues is the National City, Paradise Creek project which re-graded a creek that was continuously overflowing and causing flood damage during atmospheric river events.
The San Diego County Water Authority’s board has directed its staff to explore opportunities to help other water districts weather an emerging drought across California.
The authority said that because of three decades of investment in supply reliability, along with a continued emphasis on water-use efficiency, the San Diego region has sufficient water supplies for multiple dry years.
Those investments include high-priority Colorado River water from the Imperial Valley, seawater desalination, and access to the Semitropic Original Water Bank in Kern County, where the authority has stored about 16,000 acre-feet of water — enough to supply more than 30,000 homes for a full year.
On April 5, Helix Water District launched the Helix Helps Customer Assistance Program —a one-time credit of up to $300 to help Helix Water District’s residential customers who live in a single-family home, are behind on their water bill and can demonstrate loss of income due to the COVID-19 pandemic.
Gov. Gavin Newsom made headlines last week when he declared a drought emergency for our severely dry state — but only in two of California’s 58 counties, Mendocino and Sonoma. Some farmers in the Central Valley and others with water interests had hoped for a statewide edict.
As yet another season of drought returns to California, the mood has grown increasingly grim across the vast and fertile San Joaquin Valley. Renowned for its bounty of dairies, row crops, grapes, almonds, pistachios and fruit trees, this agricultural heartland is still reeling from the effects of the last punishing drought, which left the region geologically depressed and mentally traumatized. Now, as the valley braces for another dry spell of undetermined duration, some are openly questioning the future of farming here, even as legislative representatives call on Gov. Gavin Newsom to declare a drought emergency. Many small, predominantly Latino communities also face the risk of having their wells run dry.
