IIHR—Hydroscience and Engineering is an internationally renowned laboratory where researchers are solving some of our world’s greatest fluids-related challenges. 

Middle Cedar Watershed wetland

Rivers, Watersheds, and the Landscape

IIHR researchers are addressing issues related to sustainability in the water, energy, and food nexus; improving our understanding and adaptation to climate change; increasing community resilience to natural hazards; and helping equip society with the tools to make informed decisions.

Wave Basin

Fluid Mechanics and Structures

Fluid mechanics, the study of fluid behavior at rest and in motion, is at the core of nearly all IIHR research. IIHR uses the basic governing equations of fluid mechanics to investigate a wide range of applications—river flow, atmospheric conditions, renewable energy (e.g., wind and water turbines), ship hydrodynamics, biological systems, and much more. 

Keri Hornbuckle Research Lab

Health and the Environment

Much of IIHR’s research touches all our lives, affecting human health and well-being in meaningful ways. Studies of biofluids, environmental contaminants, vulnerability, and resilience are relevant to each of us. In addition, projects on renewable energy and watersheds help remediate society’s negative environmental impacts, leading to a higher quality, more sustainable life.

Dan Gilles presenting

Information Systems

Beginning with the innovative Iowa Flood Information System (IFIS) in 2011, IIHR has made online public access to research data the standard for its major research initiatives. IIHR has developed online data access systems for water quality information, flood mitigation projects, well-driller information, and more. These platforms provide emergency managers, decision-makers, and the public with accurate and reliable data.

Serving Iowans

From flood to drought, surface water to groundwater, IIHR is helping Iowans understand and manage water resource challenges to ensure a livable and sustainable future. 

Iowa Flood Center

Iowa Geological Survey

Iowa Nutrient Research Center

Center for Hydrologic Development

Faculty Excellence

A smiling man in white shirt and tie works at a desk with windows in the background.

Weber honored with prestigious Hancher-Finkbine Medallion

Tuesday, April 7, 2026
On April 7, the University of Iowa presented Larry Weber with its most prestigious honor, the Hancher-Finkbine Medallion.

Research Impact

A road closed sign and orange barricade block off a flooded street

The challenges and rewards of flash flood forecasting

Monday, April 20, 2026
Humberto Vergara has long dreamed of bringing reliable flash flood forecasting to countries around the world. Now he and his team are beginning to make that a reality, thanks to a major grant from the World Meteorological Organization.

Recent News

A road closed sign and orange barricade block off a flooded street

The challenges and rewards of flash flood forecasting

Monday, April 20, 2026
Humberto Vergara has long dreamed of bringing reliable flash flood forecasting to countries around the world. Now he and his team are beginning to make that a reality, thanks to a major grant from the World Meteorological Organization.
A man in shirt and tie sits on a bridge rail on a rural country road.

Longtime water program leader monitors Iowa nitrate levels as funding tightens

Monday, April 20, 2026
IIHR Director Larry Weber says that as nitrate levels continue to rise and pressure on water systems increases, he feels the responsibility of collecting and sharing water quality data weighs heavily on him in his role as a scientist and a public employee.
A view of the Iowa River as it flows through campus with the power plan in the background and trees along the banks

UI faculty receive grant to expand lead testing in Iowa water

Friday, April 17, 2026
University of Iowa and IIHR researcher David Cwiertny and his team are using a $124,000 grant from the Roy J. Carver Charitable Trust to expand “Get the Lead Out,” a statewide program that tests for lead in drinking water.

Events

4th Annual Earth Day Celebration at Fairport Fish Hatchery promotional image

4th Annual Earth Day Celebration at Fairport Fish Hatchery

Saturday, April 25, 2026 10:00am to 3:00pm
LACMRERS

Join us for the 4th Annual Earth Day Celebration!

Explore, discover, and win prizes, including events like the Great Hatchery Treasure Hunt! Join us for a family-friendly adventure; follow the trails, explore the grounds, and discover hidden “treasures” inspired by the hatchery’s natural habitats, living waters, and rich history of this unique Mississippi River landmark. Bring your curiosity, enjoy the beauty of the Mississippi River landscape, and see what treasures you uncover!

Baby fish

Live...

6th Annual BioBlitz at the Ashton Prairie Living Laboratory promotional image

6th Annual BioBlitz at the Ashton Prairie Living Laboratory

Saturday, July 11, 2026 9:00am to 11:00am
Ashton Cross Country Course

What types of plants, animals, and fungal life might you find at the Ashton Prairie Living Laboratory? Let's find out! 

Join researchers in collecting, observing, and recording biodiversity at the Ashton Prairie Living Laboratory in our 6th Annual BioBlitz. Your findings will inform a major research project and will contribute to the fifth data point in a multi-year documentation of how diversity changes at this site over time. Collections will be housed with the UI Museum of Natural History...

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