On September 21, Governor Gavin Newsom declared a state of emergency due to the “strong and likely historic El Nino event in the Pacific Ocean.” The timing of the announcement is in response to the latest predictions from the National Oceanic and Atmospheric Administration, estimating a 90 percent chance of a “very strong event during...
The August 2026 final draft of the State Water Resources Control Board’s (SWRCB) “Water Quality Control Plan for the San Francisco Bay/Sacramento-San Joaquin Delta Watershed” has been released. Written comments will be accepted through September 18, and the board will also take oral comments at the October 28-29, 2026 meeting where the SWRCB may formally adopt the plan. Anyone...
In the cities and farms immediately south of the Sacramento-San Joaquin Delta, the worst flooding of the 20th century happened in 1997. Several days of unrelenting rain pummeled the slopes of the Sierras, and with the snow line unusually high at 10,000 feet, nearly all of it poured into the San Joaquin River and other tributaries. Reservoirs...
Earlier this week, a respected YouTube channel covering the future of technology and energy released a video exploring the viability of solar panels covering California’s canals and aqueducts. The videos are hosted by Ricky Roy, a California-based mechanical engineer whose channel is called “Two Bit Da Vinci.” Reviewing his findings is an opportunity to offer some updates...
Earlier this summer a guest op-ed appeared in the Orange County Register, “Learning the right lesson from San Diego’s desal water surplus.” But the “lesson” presented was only partly accurate. What the authors, both affiliated with the Property and Environment Research Center (PERC), got right was the need to change regulations that restrict the ability for farmers to...
The operating agreements that govern Colorado River allocations expire at the end of this year, and negotiations between the seven states that share the water are stalled. With the federal government poised to step in and impose an agreement it formulates, the states — Colorado, New Mexico, Utah, and Wyoming in the upper basin, and Arizona,...
It’s January 2027, and for the last few months, a super El Nino has already delivered torrential rains to the Pacific Coast of North America. California’s reservoirs have been releasing record quantities of water to preserve space for the next round of precipitation but their remaining capacity to absorb runoff is dangerously low. From the peaks of...
When choosing what policies and projects might best ensure abundant water for California’s ecosystems, farms, and cities, the role of the delta is central. Even if large scale desalination were to someday deliver over a million acre feet of water per year to California’s coastal cities, how we manage the delta affects many times that...
The recently released “Water Renaissance” plan, a product of “conservation groups and tribes,” gets a very big idea right. There is no reason why California’s coastal megacities should have to import water. With that one visionary presumption, this report has made a major contribution. In fact, it doesn’t go far enough. With massive, targeted investments,...
Whether it’s an energy project or a water project, it’s important to avoid conflating capacity with actual production, or yield. With energy projects, that difference is much more certain than with water projects. For example, in 2024, California’s lone remaining nuclear power plant at Diablo Canyon, with an output capacity of 2.4 gigawatts, would have produced...
For most of the previous century, Californians successfully designed and built big water infrastructure. In sixty years, from 1910 through 1970, we built the most impressive system of interbasin transfers in the world. The Los Angeles Aqueduct, Hetch Hetchy Aqueduct, Colorado River Aqueduct, Delta Mendota Canal, Friant-Kern Canal, and California Aqueduct. Altogether these conveyances are...
The Carlsbad desalination plant is reportedly operating at half-capacity, basically because it’s less expensive to import water from the Colorado River. That is likely to change, as Arizona’s Department of Water Resources is negotiating with the San Diego County Water Authority to purchase some of the water they get from the Colorado River. The funds from Arizona will...