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Updated: 5 hours 40 min ago

Supreme Court Ruling Finds Old, New Middle Ground on Clean Water Act’s Application to Groundwater

April 26, 2020 - 4:37pm
By Thomas Harter, Steph Tai, and Karrigan Bork In 1972, the U.S. Clean Water Act (CWA) created a permit system for point source discharges to navigable waters of the United States – rivers, lakes, and coastal waters – with the … Continue reading →

Science of an underdog: the improbable comeback of spring-run Chinook salmon in the San Joaquin River

April 19, 2020 - 8:30am
By Andrew L. Rypel, Gabriel Singer, and Nann A. Fangue “You can’t design a worse evolutionary strategy for the Anthropocene” There are many variants on this quote, and we’ve heard them often in reference to the status of native fishes … Continue reading →

Striped Bass in the Pacific Ocean: When, where and why?

April 12, 2020 - 9:58am
by Dylan K. Stompe Striped bass are an iconic and recreationally-important fish species throughout the United States, including within their native range on the Atlantic Coast. They are also important predators in fish communities within countless reservoirs and estuaries in … Continue reading →

Eating Delta Smelt

April 5, 2020 - 4:31pm
by Peter Moyle, Center for Watershed Sciences, UC Davis Delta smelt are an endangered species and the latest estimates of their numbers indicate they will likely not be around much longer as wild fish. When I first started working on … Continue reading →

MWDC Proposes Overarching Delta Solution

April 1, 2020 - 4:28am
by Nestle J. Frobish Today the Megalopolitan Water District of California (a consortium of southern California and Bay Area urban water suppliers) proposed building a new aqueduct to take water from the Sacramento River to Bay Area and southern California … Continue reading →

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

March 28, 2020 - 3:06pm
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 →

Environmental Flows in California

March 18, 2020 - 4:00pm
By Alyssa Obester, Sarah Yarnell, and Ted Grantham The California Environmental Flow Framework was recently highlighted in the 2020 Water Resilience Portfolio to address the seemingly impossible task of establishing of how much water our rivers and streams need to … Continue reading →

New science or just spin: science charade in the Delta

March 15, 2020 - 10:39am
By Karrigan Bork, Andrew L. Rypel, and Peter Moyle Science-based decision making is key to improved conservation management and a legal mandate in the US Endangered Species Act.  Thus supporters of federal efforts to increase water exports from the Central … Continue reading →

Contemplating the Carp

March 8, 2020 - 11:55pm
By Kim Luke and Brian Williamson The UC Davis Arboretum is a defining feature of the campus. Students, faculty, and ducks alike all enjoy the waterway that was once a part of Putah Creek. Many organisms call the Arboretum “home”, … Continue reading →

Is the Sacramento Splittail an Endangered Species?

March 3, 2020 - 1:02pm
by Peter Moyle, Dylan Stompe, and John Durand The Sacramento splittail is a lovely, silvery-white fish that lives primarily in Suisun Marsh, the north Delta and other parts of the San Francisco Estuary (SFE; Moyle et al. 2004). The name … Continue reading →

California’s Driest February and Coming Drought?

March 1, 2020 - 4:56pm
    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 →

Field courses help young people see the real world

February 14, 2020 - 5:47pm
by Andrew L. Rypel It was perhaps unsurprising I wound up a field ecologist. Raised in Wisconsin, I spent almost all my childhood free time roaming largely unchaperoned in nature, pre-internet. It was there that I developed a deep love … Continue reading →

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

February 2, 2020 - 3:45pm
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 →

Realty Meets Climate Reality

January 26, 2020 - 4:20pm
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 →

Striped Bass: An Important Indicator Species in the Delta

January 12, 2020 - 5:10pm
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 →

A Change of Plans

January 5, 2020 - 5:19pm
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 →

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

December 22, 2019 - 4:03pm
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 →

Futures for Delta Smelt

December 15, 2019 - 3:25pm
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 →

Jobs per drop irrigating California crops

December 8, 2019 - 8:51pm
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 →

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

December 1, 2019 - 4:03pm
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 →