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A biologist, economist, engineer and geologist walk onto a bar...
Updated: 3 hours 30 min ago

From buckets to umbrellas: fish conservation before the storm

January 16, 2022 - 6:02am
By Alyssa Obester, Rob Lusardi, Sarah Yarnell, Ryan Peek, and Nick Santos Fish need water. While minimum flows and other emergency-response approaches might save some fishes during crises, such “bucket-based” approaches are insufficient in the long-term. For example, biologists in … Continue reading →

Continued drought early in a possibly wet year

January 9, 2022 - 3:37am
by Jay Lund California’s 2021 calendar year is over, but its 2022 Water Year (which started October 2021) is already three months old and still early in its wet season.  So far this wet season is actually wet. It is … Continue reading →

California Waterblog 2021 “Wrapped”

January 2, 2022 - 5:34am
by Christine A. Parisek and Andrew L. Rypel “The wait is over.  Your [California Waterblog 2021 Wrapped] is here.”  As we embark on another new year, we reflect and earnestly thank all of our readers, partners, authors, and friends. Studying … Continue reading →

A Fishmas Carol: Ghosts of Salmons’ Pasts

December 26, 2021 - 6:00am
by Kelly Neal Here is a story not quite like the one you have heard before, but echoes a similar tune as traditional lore. California salmon are at a precipice with conservation attempting to mitigate threats of climate change, habitat … Continue reading →

Defending ‘Rough Fish’

December 19, 2021 - 5:32am
by Andrew L. Rypel Have any of you ever reached a tipping point with some topic, issue, or bone-to-pick? Well, one benefit of being a tenured professor is the ability to speak up when you feel like the science or … Continue reading →

A Recorded Conversation with Dr. Peter B. Moyle

December 12, 2021 - 6:02am
With John Durand Dr. Peter Moyle was the main reason that I came to UC Davis fifteen years ago to study the confusing ecology of the San Francisco Estuary. Peter is a Distinguished Professor of Fish Biology, Emeritus, and one … Continue reading →

How dry will 2022 be?

November 28, 2021 - 2:04pm
by Jay Lund Last year, Northern California had very little precipitation in October and November, and we wondered if California was entering into a multi-year drought. Today, we know – last year became the 3rd driest year on record for … Continue reading →

Adjusting past hydrology for changes in climate

November 21, 2021 - 4:14am
by Jay Lund Segal’s Law: “Someone with one watch knows what time it is. Someone with two watches is never sure.”  Time is certain, but its estimation and measurement are uncertain, yet we are not in total ignorance. Many water … Continue reading →

Which species will survive? Climate change enhances the vulnerability of California freshwater fishes to severe drought

November 14, 2021 - 6:01am
By Peter Moyle As I write this on an October weekend, rain is falling steadily in Davis and has been for most of the day. This is the first real rain we have had in over seven months. But it … Continue reading →

Managing Water Stored for the Environment During Drought

November 7, 2021 - 6:00am
By Sarah Null, Jeffrey Mount, Brian Gray, Michael Dettinger, Kristen Dybala, Gokce Sencan, Anna Sturrock, Barton “Buzz” Thompson, Harrison “HB” Zeff Introduction Storing water in reservoirs is important for maintaining freshwater ecosystem health and protecting native species. Stored water also … Continue reading →

Can one atmospheric river end California’s drought?

October 31, 2021 - 6:48am
By Andrew L. Rypel and Jay Lund Given the quantity and intensity of last week’s rain, an obvious question is: ‘Is the drought over?’ Alas, the answer is a resounding no. But, the data are interesting and worth thinking about … Continue reading →

Fish eyes: the hidden diet journal

October 24, 2021 - 6:15am
by Miranda Bell-Tilcock It is strange to think of an eye as a diet journal, but a fish’s eye can tell much about what it has been eating at each point in its life. If we know what a fish … Continue reading →

Sometimes, studying the variation is the interesting thing

October 17, 2021 - 8:06am
By Andrew L. Rypel As scientists, we’re trained to key in on ‘response variables’. In my case, fisheries scientists often examine how fish physiology, populations, communities or whole ecosystems react to various environmental drivers or human alteration. Unfortunately, variation in … Continue reading →

The Big California Drought Stories of 2021

October 3, 2021 - 5:43am
by Jay Lund Happy New Water Year!  October 1, 2021 is the beginning of the 2022 water year in California, the traditional beginning of California’s “wet season”, such as it will be. Although there are many fine and interesting stories … Continue reading →

Developing tools to model impaired streamflow in streams throughout California

September 26, 2021 - 6:08am
by Jeanette Howard, Kirk Klausmeyer, Laura Read, and Julie Zimmerman Droughts are extreme, but not necessarily extreme events — at least not in the way we humans usually experience events as discrete, episodic occurrences. Droughts are continuous and exhausting; they … Continue reading →

Risk Rating 2.0: A first look at FEMA’s new flood insurance system

September 19, 2021 - 7:00am
By Ryan Miller, Peter Hansen, and Nicholas Pinter Risk Rating 2.0 has been called the Federal Emergency Management Agency’s (FEMA)’s most significant reform in 50 years.  Roughly 77% of customers of the National Flood Insurance Program (NFIP) nationwide will see … Continue reading →

Could California weather a mega-drought?

September 12, 2021 - 5:23am
By Jay Lund “Mega-drought” has become a frightful “thing” in public and media discussions.  In the past 1,200 years, California had two droughts lasting 120-200 years, “megadroughts” by any standard. Could the state’s water resources continue to supply enough water … Continue reading →

Lessons from Three Decades of Evolution of Cropland use in the Central Valley

September 5, 2021 - 5:47am
by José M. Rodríguez-Flores, Spencer A. Cole, Alexander Guzman, Josué Medellín-Azuara, Jay R. Lund, Daniel A. Sumner California’s Central Valley is the source of more than $30 billion of farm value. It produces more milk than any state outside California, … Continue reading →

Dammed hot: California’s regulated streams fail cold-water ecosystems

August 29, 2021 - 8:00am
Given the current drought, it’s no surprise that California’s dams are struggling to provide cool water habitats to support native freshwater ecosystems. But what if they were never able to support them under any conditions? New research shows how current … Continue reading →

2021 Drought in California – in one page

August 22, 2021 - 7:45am
by Jay Lund Droughts and this drought in California California has more hydrologic variability than any state in the US, meaning that we have more drought and flood years per average year than any other state.  This is a problem, … Continue reading →