Independent research and analysis of California's developed water systems
High flood flows in Tulare County are causing levee breaches. Levee breaches on Deer Creek and Poso Creek are currently endangering Allensworth, a California town that was founded by African-Americans, as well as the town of Alpaugh. For more background on Allensworth, see this article. Los Angeles Times reporter Ian James drove to Allensworth and … Continue reading Chaos in Tulare County shows need for advance flood planning
One of the largest water rights hearings in the California State Water Resources Control Board’s history was the hearing on eight applications by the California Department of Water Resources (DWR) for the State Water Project. The then-called State Water Rights Board approved the permit for the State Water Project in Water Rights Decision 1275 on … Continue reading State Water Project water rights assume augmentation of Sac River flows by 890,000 af/year
By Kathleen Schaefer and Deirdre Des Jardins Hurricane Ian has shown the vulnerability of the rapidly growing cities in the Southeast to storm-driven flooding. As reported in the New York Times, in the counties whose residents were told to evacuate, just 18.5 percent of homes have insurance through the National Flood Insurance Program (NFIP) (Flavelle … Continue reading On the “long tail” of flood disaster losses in California
On September 2, 2022, Lisa Wainger, the new Chair of the Delta Independent Science Board, sent a letter to the Department of Water Resources Director, Karla Nemeth, asking for a 30 day extension of time to comment on the Delta Conveyance Project Draft EIR. The DISB Chair's letter gave the following reasons for asking for … Continue reading Delta Independent Science Board requests extension on Delta tunnel Draft EIR comments
On September 12th, 2022, the Sixth District Court of Appeal issued a ruling that the State Water Resources Control Board did not have the authority to curtail pre-1914 water rights under Water Code section 1052(a). This code section provides that “The diversion or use of water subject to this division other than as authorized in … Continue reading Will ruling on pre-1914 curtailments force the Water Board to track stored water?
Last year, I read the book, “The Gift of Anger and other lessons from my grandfather, Mahatma Gandhi." It's by Mahatma Gandhi's fifth grandson, Arun Gandhi. Arun asked his grandfather why he didn’t get angry. Mahatma Ghandi answered, "it is not that I don't get angry. I have learned to use my anger for good. … Continue reading Tales from the Water Wars: The Gift of Anger and other lessons from Gandhi
This blog post analyzes long term changes in the Sacramento Four River runoff using a 10 year and 30 year running mean. Sacramento River runoff was lower during the Dust Bowl era drought of 1928-34, and the current 30 year mean runoff is close to the mean for the historic record. However, the current 10 … Continue reading Water Board’s Decision 1641 adopted in wetter period
California's FY 2022-23 budget provides huge, once in generation capital investments. And extreme flooding is a growing climate risk, as the ARkStorm 2.0 study by XingYing Huang and Daniel Swain illustrates. In November of 2021, after the unprecedented flooding in British Columbia, we called for California to prepare for unprecedented flooding, citing a 2018 study … Continue reading California’s FY 2022-23 budget invests little in flood risk reduction
The problem is not growing water-intensive crops in California, but growing them in the driest areas in the state. The arid scrubland on the southern floor of the San Joaquin Valley gets about 7-8 inches of rain a year.
The Delta tunnel Draft Environmental Impact Report (DEIR) has a new Sea Level Rise Study in Technical Appendix 5A-F. The study was done with Bay-Delta SCHISM, a 3-D hydrodynamic model of the San Francisco Bay and Delta. The new SCHISM study has limitations, in that it assumes that Delta levees are raised to keep up … Continue reading Delta tunnel — Inconvenient truths about sea level rise and salinity intrusion