California Water Related

Suisun Marsh fishes in 2020: Persistence during the Pandemic

California WaterBlog - April 18, 2021 - 9:31am
by Teejay O’Rear, John Durand, Peter Moyle Suisun Marsh is central to the health of the San Francisco Estuary. Not only is it a huge (470 km2) tidal marsh in the center the northern estuary (Figure 1), but it is an … Continue reading →

Increasing groundwater salinity changes water and crop management over long timescales

California WaterBlog - April 11, 2021 - 7:00am
by Yiqing “Gracie” Yao and Jay Lund Salinity has often become a major limit for irrigated agriculture in semi-arid regions, from ancient Mesopotamia to parts of California today. A previous blog post showed that conjunctive use with more saline groundwater … Continue reading →

Looking for a new challenge? – Retrain as a Delta Smelt

California WaterBlog - April 1, 2021 - 1:42am
Help restore one of California’s most endangered species while supporting California’s water supplies in a time of drought. The Federal government is beginning a program for the unemployed to retrain as much-needed Delta Smelt.  Following a two-day course, candidates will … Continue reading →

That Time Warren Buffett Got Involved in California Water

California WaterBlog - March 21, 2021 - 6:45am
by Andrew L. Rypel As if 2020, wasn’t completely strange enough, it wound up also being a time when Warren Buffett was plunged headlong into California water. Buffett of course is an American business tycoon – primarily an investor, and … Continue reading →

California’s New Drought

California WaterBlog - March 14, 2021 - 7:53am
By Jay Lund, Andrew L. Rypel, and Josue Medellin-Azuara As March begins to drag on with little precipitation in the forecast and few weeks left in California’s traditional wet season, we are in another dry year. This is California’s second … Continue reading →

Managing Water and Crops with Groundwater Salinity – A growing menace

California WaterBlog - March 7, 2021 - 6:27am
by Yiqing “Gracie” Yao and Jay Lund Salinity is an eventual threat to agriculture and groundwater sustainability in parts of California, and other irrigated parts of the world. Irrigation, lower groundwater levels, and natural conditions have dramatically increased groundwater salinity … Continue reading →

Celebrating Black Scientists in Fisheries & Biology

California WaterBlog - February 28, 2021 - 6:00am
By Kim Luke, Christine Parisek, Rachelle Tallman, Marissa Levinson, Sarah Yarnell, Miranda Bell Tilcock, Andrew Rypel, and Jay Lund In honor of Black History Month, the Center for Watershed Sciences would like to highlight the contributions of Black scientists in … Continue reading →

Groundwater Salinization in California’s Tulare Lake Basin, the ABCSAL model

California WaterBlog - February 21, 2021 - 11:20am
By Rich Pauloo and Graham Fogg Lower groundwater levels can prevent drainage of water and salts from a basin and increase aquifer salinity that eventually renders the groundwater unsuitable for use as drinking water or irrigation without expensive desalination. Pauloo … Continue reading →

Eat Prey Loon: lessons from juvenile loons in Wisconsin

California WaterBlog - February 14, 2021 - 6:00am
by Brian A. Hoover, Andrew L. Rypel and Walter H. Piper Do you remember when you first moved from home, and were completely on your own in new surroundings? How did you decide where to live, or which restaurants to … Continue reading →

Can Japanese Smelt Replace Delta Smelt?

California WaterBlog - February 7, 2021 - 6:00am
by Peter Moyle A question I get asked on occasion is: Why all this fuss about endangered delta smelt when there is another smelt that looks just the same that can takes its place? The smelt being referenced is the wakasagi … Continue reading →

February 1: Is California Still Heading for a Multi-Year Drought?

California WaterBlog - January 31, 2021 - 6:23am
by Jay Lund, Peter Moyle, and Andrew Rypel This updates a post from December on the likelihood of California entering a second dry year. Normally, a second dry year brings drought operations for California’s overall water system operations. Today, it … Continue reading →

A Swiss Cheese Model for Fish Conservation in California

California WaterBlog - January 24, 2021 - 6:05am
by Andrew L. Rypel, Peter B. Moyle, and Jay Lund We read with great interest Nicholas Chistakis’s piece outlining a “Swiss Cheese Model For Combating Covid-19” in the Wall Street Journal. Christakis presents a model for considering the individual steps … Continue reading →

Managing Groundwater Overdraft – Combining Crop and Water Decisions (without salinity)

California WaterBlog - January 17, 2021 - 4:39am
by Yiqing “Gracie” Yao and Jay Lund California’s Central Valley produces much of the nation’s food, including about 40% of the country’s fruits and nuts and has the nation’s second most pumped aquifer system. Its drier southern portion, the San … Continue reading →

2021: Is this the year that wild delta smelt become extinct?

California WaterBlog - January 10, 2021 - 6:05am
by Peter Moyle, Karrigan Börk, John Durand, T-C Hung, and Andrew L. Rypel 2020 was a bad year for delta smelt. No smelt were found in the standard fish sampling programs (fall midwater trawl, summer townet survey). Surveys designed specifically … Continue reading →

California’s Sacramento-San Joaquin Delta – a short history of big changes

California WaterBlog - January 3, 2021 - 7:19am
by Jay Lund Deltas globally adjust with changes and fluctuations in external conditions, internal dynamics, and human management.  This is a short history of big changes to California’s Sacramento-San Joaquin Delta (Delta) in the past and present, and its anticipated … Continue reading →

We Wish You A Silly Fishmas

California WaterBlog - December 27, 2020 - 6:00am
by Kim Luke Night Before Fishmas “Twas the night before Fishmas, when all through the spaceNot a creature was stirring, not even a Dace;The fyke nets were hung by the boat dock with care,In hopes that St. Fish-olas soon would … Continue reading →

Picture this research – a photo blog from the Center for Watershed Sciences

California WaterBlog - December 20, 2020 - 6:00am
by Scientists at CWS Holidays are a natural time of introspection on who we are, what we do, and why. Towards a bit of our own self-reflection, some researchers from UC Davis’ Center for Watershed Sciences (CWS) have each contributed … Continue reading →

Making “productive” assessments of California’s ecosystems

California WaterBlog - December 13, 2020 - 6:00am
by Andrew L. Rypel Conservation science and restoration ecology are challenging and interdisciplinary fields. Managing for ecological function necessitates focus on multiple scales of ecological organization while simultaneously integrating feedback loops with critical environmental drivers like temperature, flow and habitat … Continue reading →

Is California Heading for a Multi-Year Drought?

California WaterBlog - December 6, 2020 - 8:47am
by Jay Lund Yes, California will have another multi-year drought.  California has immense hydrologic variability, with more droughts and floods per average year than any other part of the country.  California’s water users, managers, and regulators should always be prepared … Continue reading →

Functional Flows Can Improve Environmental Water Management in California

California WaterBlog - November 29, 2020 - 7:42am
By Ted Grantham, Jeanette Howard, Belize Lane, Rob Lusardi, Sam Sandoval-Solis, Eric Stein, Sarah Yarnell and Julie Zimmerman Over the past three years, a team of scientists from universities, NGOs, and state agencies across California have been working to provide … Continue reading →