Fatal errors in DWR’s runoff forecasting: comments to the State Water Resources Control Board

The State Water Resources Control Board held a workshop today (March 16, 2022) on Sacramento River Temperature Management. Among the topics considered were "hydrologic conditions, including operations, forecasting, and accounting." These were my comments. This is Deirdre Des Jardins with California Water Research. I’m the physicist who sent comments to DWR in 2012 predicting the … Continue reading Fatal errors in DWR’s runoff forecasting: comments to the State Water Resources Control Board

California Environmental Flows Framework — comments to the Delta ISB

Picture of dry creek

On Thursday March 10, 2022, the Delta Independent Science Board had a presentation by Sarah Yarnell (UC Davis) and Julie Zimmerman (The Nature Conservancy) on the California Environmental Flows Framework, and the opportunities and challenges in  applying environmental flows in California. These were my comments: I really appreciate the comments by [Delta ISB members] Tanya … Continue reading California Environmental Flows Framework — comments to the Delta ISB

In increasing State Water Project allocations, DWR is taking huge risks

The Department of Water Resources has just announced that they are increasing the State Water Project allocations to 15%. Given the huge problems last year with watershed runoff forecasts, DWR is taking a huge risk of not meeting environmental water needs later in the year. In November 2021, nine scientists from leading California water research … Continue reading In increasing State Water Project allocations, DWR is taking huge risks

Diversions by Sacramento Settlement Contractors and CVP Permits

California Water Research submitted comments on the State Water Resources Control Board's Water Unavailability Methodology which raised the issue that Reclamation has never fully complied with CVP permit terms that require reporting of the total amount diverted under Reclamation’s CVP water rights at the Sacramento Settlement Contractors’ points of diversion. While Reclamation is reporting daily … Continue reading Diversions by Sacramento Settlement Contractors and CVP Permits

State Water Board formally objects to Reclamation’s 2020 Sacramento River Temperature Management Plan

On Monday, June 1, 2020, the State Water Resources Control Board sent a letter to Ernest Conant, Mid-Pacific Director of the Bureau of Reclamation, objecting to Reclamation’s 2020 Sacramento River Temperature Management Plan. Under Water Right Order 90-5, Reclamation is required to operate Shasta and Keswick Dams to provide adequate cold water in the Sacramento … Continue reading State Water Board formally objects to Reclamation’s 2020 Sacramento River Temperature Management Plan