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Elliot crouches by the Yellow River to collect a water sample

Peaking Your Interest

Elliot crouched by a round machine holding empty collection bottles at the side of a stream

Anderson crouches down to set up the ISCO sampler in the Yellow River in Northeast Iowa.

Elliot Anderson works between rainstorms, gathering data from collection bottles left in the water. Each storm is an opportunity to learn more about the peak flow conditions and nutrient concentrations of rivers across Iowa.

Anderson is a PhD student at IIHR—Hydroscience and Engineering, and was born in Geneva, Ill., a town just outside Chicago. When he was deciding on colleges, he knew he wanted to stay in the Midwest and eventually settled on Purdue University. There, he received an undergraduate degree before attending the University of Illinois at Chicago for a master’s degree, both in civil engineering. After that, Anderson worked as a consultant for five years at Civiltech Engineering in Chicago before returning to Iowa.

“After I did my undergrad and was kind of over doing consulting work, [I] wanted to try my hand at research. So I was looking for a PhD, looking to stay in the Midwest, and looking to do something water-related,” Anderson says. “Iowa was a pretty natural choice for those three things.”

Today, he is a member of Larry Weber’s Iowa Watershed Approach research team, studying phosphorus contamination of streams and rivers during peak flow conditions. Though there is an abundance of research for the waterways at base flow, increased flow conditions are infrequent and tough to predict, and thus can be difficult to measure.

Anderson says the data collected thus far matches the expected results for peak flow conditions based on their previous base flow data.

“If it was something different, or things do turn out to be different, that’s still really informative and there’s still an interesting story to tell about how you describe phosphorous at the higher flows apart from the lower ones,” Anderson says.

Anderson crouches far from the camera near the edge of a river that takes up most of the frame

Anderson collects water from the Yellow River.

The team is still in preliminary stages of its research, so while the data currently follow a familiar trend, that may change as they collect more information.

Water content studies help Anderson and his team understand how the phosphorus concentration in the water changes with flow variance. Phosphorus acts as the limiting reactant in fresh water; it provides nutrients to algae, which can cause algal blooms in Iowa waterways. These blooms contribute to a decline in health of lentic environments.

Another aspect of the team’s research is to determine if current mitigation processes are reaching the pre-determined nutrient reduction benchmarks set by the Iowa Nutrient Reduction Strategy. The goals aim to improve the overall ecosystem health in Iowa and all the way downstream to the Gulf of Mexico.

Anderson says audio books keep him entertained as he crisscrosses Iowa collecting data from bottle-filling stations installed across the state. When he’s home, Anderson says he likes to keep up with Chicago sports teams. He was still in Chicago when the Cubs won the World Series for the first time in over 100 years back in 2016, and since he started at the University of Iowa, he has enjoyed attending Iowa football games.

An Iowa Watershed Approach project taken from above

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Witold Krajewski

Krajewski Receives PIASA Award

Congratulations to Iowa Flood Center Director Witold Krajewski on being selected to receive the 2021 Tadeusz Sendzimir Applied Sciences Award, presented by the Polish Institute of Arts and Sciences of America (PIASA) for his outstanding contributions to the field of flood research, particularly flood prediction and flood risk reduction! Krajewski is also the Rose and Joseph Summers Chair in Water Research Engineering in the Department of Civil and Environmental Engineering at the University of Iowa, as well as a research engineer at IIHR—Hydroscience and Engineering (IIHR) and director of the Iowa Flood Center. The Sendzimir Award comes with a certificate and monetary prize of $1,000.

Krajewski, who was born, raised, and educated in Poland, says this honor is particularly significant to him. “It has a great deal of sentimental value,” he explains. His late parents were both academics in Poland; his mother was director of the University of Warsaw Library, and his father was a professor of water resources engineering, and later a visitor at the IIHR. Krajewski believes they would be especially proud of this recognition.

The PIASA awards form a bridge between the United States and Polish culture, education, and science. Inaugurated in 1995, they honor distinguished scholars and scientists for their achievements. The awards are given across a broad swath of academic work, including the fields of history, sociology, natural science, applied sciences, and humanities. The awardees are among the most distinguished in their fields.

“I’m happy to be in that company,” Krajewski says.

Witold Krajewski

Witold F. Krajewski named AAAS fellow

Witold KrajewskiWitold Krajewski, Professor of Civil and Environmental Engineering, has been named a fellow of the American Association for the Advancement of Science (AAAS), the world’s largest general-scientific society and publisher of the journal Science. Election as an AAAS fellow is an honor bestowed upon AAAS members by their peers.

Krajewksi, who is also a research engineer in IIHR—Hydroscience and Engineering and director of the Iowa Flood Center, was selected “for major scientific advances in hydrometeorology, flood prediction, and water resources.”


Krajewski’s research spans hydrometeorological processes of rainfall, soil moisture, and flooding. His work has advanced weather radar and satellite remote sensing of rainfall. His work on floods has advanced real-time stream flow forecasting combining rainfall-runoff models and field observations. His studies of the spatial organization of floods in river networks have major implications for estimating future flood frequencies.

Krajewski is one of seven University of Iowa faculty members named as fellows of AAAS in 2021. Read more on Iowa Now to learn about the University of Iowa’s other new AAAS fellows.