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

Iowa INSIGHT

Center for Hydrologic Developement

Research Impact

Flood water covers a roadway with green leafy trees on either side

In a Small Iowa Town, a Solution to a National Crisis

Friday, May 1, 2026
As a new flood season approaches, many Americans remain haunted by the last. But Iowans are fortunate — we have access to the incredible tools developed and maintained by engineers at the state-funded Iowa Flood Center.

Recent News

Two men in dress shirts stand in front of a dam across the Iowa River

Close Up: Iowa waterways scrutinized over nitrate levels

Tuesday, June 30, 2026
Des Moines’ summer watering ban has brought attention to high nitrate levels in waterways and efforts to monitor environmental issues statewide.
A view of a river with rocks and trees on the banks

Iowa Insight expanding monitoring on water and air quality

Tuesday, June 30, 2026
Iowa INSIGHT will expand environmental monitoring across the state, tracking air and water quality. The program aims to pinpoint factors that may contribute to Iowa’s high cancer rate.
A view of the Iowa River near IIHR at the University of Iowa

Iowa INSIGHT begins July 1 with goal to monitor air and water quality statewide

Tuesday, June 30, 2026
Starting July 1, Iowa INSIGHT will launch as a statewide environmental monitoring program to track air and water quality, aiming to address public health concerns such as cancer risks and pollution.

Events

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...

Grandparents University®: Discover Your Watershed promotional image

Grandparents University®: Discover Your Watershed

Thursday, July 16, 2026 8:00am to 4:30pm
Hydraulics Wind Tunnel Annex

Hawkeye grandparents and grandchildren, ages 8-14 years old, can experience student life together while taking part in educational, fun, and unique activities.

Explore extreme weather events, particularly flooding, as well as water-quality challenges in Iowa. Design your own watershed systems, experimenting with different materials to discover how to reduce flood impacts and agricultural runoff to protect clean water. By the end, you will better understand how land-use practices impact flooding...

Community Stem Day with Collins Aerospace promotional image

Community Stem Day with Collins Aerospace

Thursday, July 16, 2026 9:00am to 2:00pm
Collins Aerospace

Join us for Community STEM Day, hosted by Collins Aerospace in collaboration with the Southeast Iowa STEM Hub.

This exciting farmer’s market-style STEM event will take place from 9:00 AM to 2:00 PM at the Collins Aerospace C Ave Complex near the Building 112 entrance in Cedar Rapids. The day will feature engaging STEM activities from businesses, individuals, and organizations from the Cedar Rapids area. There will also be lab tours, in-depth workshops, and food trucks offering lunch for purchase...

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