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A biologist, economist, engineer and geologist walk onto a bar...
Updated: 3 hours 22 min ago

Eat Prey Loon: lessons from juvenile loons in Wisconsin

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?

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?

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

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)

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?

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

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

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

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

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?

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

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 →

Getting to the Bottom of What Fuels Algal Blooms in Clear Lake

November 22, 2020 - 6:00am
By: Nick Framsted Clear Lake is one of California’s oldest and most unique natural features. Nestled in Northern California’s coastal mountains, Clear Lake is the largest lake completely within California and is the oldest lake in North America with sediments … Continue reading →

Planning for a shorter rainy season and more frequent extreme storms in California

November 15, 2020 - 8:00am
By Claire Kouba and J. Pablo Ortiz Partida California’s hydrologic future is muddled by a fundamental uncertainty: will the state get wetter or drier? Climate models disagree on this question, but provide insights on other important water management questions. The … Continue reading →

Small Dam, Big Deal: York Dam Removed in Napa Valley

November 8, 2020 - 7:00am
By: Amber Manfree, Peter Moyle, Ted Grantham The recent removal of the sediment-filled York Dam in Napa County has reconnected two miles of steelhead trout habitat that has been blocked for over a century. While the dam itself was small … Continue reading →

The Freezer of Horrors

October 31, 2020 - 4:17am
by Miranda Bell-Tilcock, Jamie Sweeney, and Malte Willmes Down the dark corridors of the Watershed Sciences building are freezers of dead fish. Frozen Chinook Salmon carcasses and their dissected eyes and muscles in neat vials are stacked next to White … Continue reading →

New insights into Putah Creek salmon

October 18, 2020 - 4:28pm
by Malte Willmes, Anna Steel, Levi Lewis, Peter B. Moyle, and Andrew L. Rypel It’s November 2016, and we’re out in canoes on Putah Creek as part of the annual salmon survey. Just as we navigate our watercraft through a … Continue reading →

Rockin’ with the Rockfish

October 11, 2020 - 4:38pm
By Andrew L. Rypel and Peter B. Moyle California is a spoil of natural resource riches. Most times, our California waterblog busies itself with important freshwater resources issues. Yet every now and again, it is refreshing and worth turning our … Continue reading →

Happy 2021! Here’s to a New Water Year!

October 4, 2020 - 1:38am
by Jay Lund 2020 was terrible, and as a water year (WY), October 2019 – September 2020, it is over.  A dry winter (drier than 2014-2015 in Sac. Valley), COVID-19, deep recession and unemployment, wildfires, racial violence and unrest, extreme … Continue reading →

How will climate change affect the economic value of water in California?

September 27, 2020 - 8:03am
by Lorie Srivastava Climate change is affecting natural resources in California, with water being one of the most important in the state. Water source is critical for municipalities, agriculture, industry, and habitat/environmental purposes. Will future supply meet future demand? How … Continue reading →