Author Archives: jaylund

About jaylund

Professor of Civil and Environmental Engineering Director, Center for Watershed Sciences University of California - Davis

Is California’s dry 2020 water year a drought? Prepare anyway

by Jay Lund Not again! There was not a “Miracle March” to follow California’s precipitation “Flat-line February.”  Instead, we’ve had a “Meh March.” With the near-end of its wet season, California’s 2020 water year is and will be dry.  The … Continue reading

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California’s Driest February and Coming Drought?

    By Jay Lund February has been amazingly dry in California, if anyone hasn’t noticed.  No precipitation at all in February, a dry forecast, about 51% of seasonal Sacramento Valley precipitation (a bit less for the San Joaquin and … Continue reading

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Episode 1: “Unraveling the Knot” Water movement in the Sacramento-San Joaquin Delta – reprise

By Bill Fleenor, Amber Manfree, and Megan Nguyen This is a re-posting from January 22, 2017.  Reminders on how things work are sometimes useful. (The whole series, with links below, is thought-provoking.) In 2010, John DeGeorge of RMA, Inc used … Continue reading

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Realty Meets Climate Reality

by Kat Kerlin My husband and I fell in love a couple of months ago. It was with a house by a river. (See what I did there?) This is the river that was a stone’s throw away when we … Continue reading

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Striped Bass: An Important Indicator Species in the Delta

by Peter Moyle The striped bass is a favorite sport fish in the San Francisco Estuary (SFE), especially the Delta, because of its large size, sporting qualities, and tasty flesh. Historically, it supported major commercial and sport fisheries but the … Continue reading

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A Change of Plans

by Jay Lund The 1957 California Water Plan was ambitious for its time, and successful in its own way for a time. This plan was the ultimate major water project development plan arising from a century of struggles to orient … Continue reading

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Rapid changes in the Sacramento-San Joaquin Delta both diminish scientific certainty and increase science’s value

by Jay Lund Conditions in the Sacramento-San Joaquin Delta are changing, changing in new ways, and changing rapidly.  Changes are rampant not only in climate, but also in ecosystem structure, economic structure and globalization, invasive species, infrastructure, water demands, environmental … Continue reading

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Futures for Delta Smelt

by Peter Moyle, Karrigan Bork, John Durand, Tien-Chieh Hung, Andrew Rypel A recent biological opinion (BiOp) released by the U.S. Fish and Wildlife Service (FWS) concluded that a proposed  re-operation of California’s largest water projects will avoid driving the federally … Continue reading

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Jobs per drop irrigating California crops

By Josué Medellín-Azuara, Jay Lund and Richard Howitt Reposted from Apr 28, 2015 (an oldie, but goodie!) Some of the most popular drought stories lately have been on the amount of what water needed to produce food from California, as a consumer … Continue reading

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Turbidity and Insights on Flow-Habitat-Fish Abundance Curves in Policy-making

by Jay Lund California’s water policy community continues to be embroiled on how best to manage what remains of California’s native aquatic ecosystems, particularly for the Sacramento-San Joaquin Delta and its tributaries.  One aspect of this controversy is the dedication … Continue reading

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