Estuary News

February 2022

Science in Short: Daylighting Delta Data

Interview with Sam Bashevkin

Once you know how many fish are present in a particular part of a river, including additional details like the time of day and water temperature, what do you do with this information?

For decades, Delta researchers have collected millions of similar data points from daily visits to the San Francisco Estuary, not all of which are available or immediately useful. How that information is then translated into a language relevant to water and conservation managers requires serious number, or data, crunching.

Sam Bashevkin, senior environmental scientist at the Delta Science Program in the Delta Stewardship Council, is working to bring data science to the San Francisco Estuary and help to make sense of the overwhelming data troves generated by field researchers. “Whether it’s an explanation for why the world is as it is or why some ecological function is performing a certain way … that’s what we’re trying to extract out of the big swath of data out there,” Bashevkin says. “It’s really a form of storytelling.”

Originally from Vermont, Bashevkin relocated to California in 2014 for a PhD program at UC Davis. While studying ecology, he noted the difficulties associated with analyzing and understanding the story behind complex data sets. He soon realized that he enjoyed experimenting with sophisticated computer software tools more than collecting the data itself and gravitated towards data science.

Bashevkin joined the Delta Science Program in 2019 and has been working to synthesize over 150 unique monitoring efforts in the Bay-Delta system ever since. According to Steven Culberson, Lead Scientist of the Interagency Ecological Program, research and monitoring efforts across the Estuary are decentralized and involve a lot of different institutions and mandates. “Data scientists have helped us understand better ways to organize our programs, more efficient means of synthesizing data, and new ways to use higher quality datasets,” says Culberson.

Two examples of the variety of data collected in different ways for both monitoring and other activities in the Delta. Sources: (Left) Delta Smelt Conditions Report, DSC; (right) Jeanette Clark, National Center for Ecological Analysis and Synthesis.

For Louise Conrad, the deputy executive officer of the Delta Stewardship Council’s Science Program, bringing data scientists like Bashevkin on board is helping to improve the accessibility, organization, documentation, and integration of data. “When we can look at related datasets as a whole, rather than one at a time, we get a more comprehensive view,” Conrad says. “To be prepared for new management and environmental challenges to come, we need to have a full picture of the Delta system.”

As data are better organized, described, and made available, the number of researchers and policymakers who see the usefulness of this data for their own purposes continues to grow. “It’s a foundation upon which repeatable conclusions can be made,” says Culberson.

Bay-Delta Monitoring Interactive Map App

Science Synthesis Delta Stewardship Council

Review of the Monitoring Enterprise in the Sacramento-San Joaquin Delta, Delta Independent Science Board (2022).

Interagency Ecological Program Long-term Monitoring Element Review: Pilot approach and methods development (2020).

Delta Smelt Conditions Report DSC

About the author

Ashleigh Papp is a science writer based in San Francisco. She has a background in animal science and biology, she enjoys writing about emerging environmental issues, our oceans, and conservation-related science. For ESTUARY, she often covers wildlife. When not reading or writing, she's playing outside with friends or inside with her cat, Sandy.

Related Posts

American Avocet on managed, former salt ponds in the South Bay. Photo: Roopak Bhatt, USGS

One-of-a-Kind Stories

Our magazine’s media motto for many years has been “Where there’s an estuary, there’s a crowd.” The San Francisco Estuary is a place where people, wildlife, and commerce congregate, and where watersheds, rivers and the ocean meet and mix, creating a place of unusual diversity. In choosing to tell the...
dam spillway oroville

Supplying Water

Ever since the state and federal water projects were built in the 1930s and 1940s, California has captured snowmelt in foothill reservoirs, and moved the fresh water from dam releases and river outflows to parched parts of the state via aqueducts hundreds of miles long. A convoluted system of ancient...

Tackling Pollution

Though the Clean Water Act did an amazing job of reducing wastewater and stormwater pollution of the San Francisco Estuary, some contaminants remain thorny problems.  Legacy pollutants like mercury washed into the watershed from upstream gold mining, PCBs from old industrial sites, and selenium from agricultural drainage in the San...