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Central Midwest Water Science Center

Welcome to the Central Midwest Water Science Center’s (CMWSC) Website. We offer information on streamflow, water quality, water-use, and groundwater data for Illinois, Iowa, and Missouri. We conduct unbiased, scientific hydrologic investigations & research projects to effectively manage CMWSC and our Nation's water resources through joint efforts with our partners.

 

News

Friday's Findings: Environmental Contaminants and Agricultural Production

Friday's Findings: Environmental Contaminants and Agricultural Production

StreamStats regression equation updates for Illinois

StreamStats regression equation updates for Illinois

Southeast Region (SER) Science Workshop: Identifying Science to Meet Administration Priorities and the Needs of Our Stakeholders

Southeast Region (SER) Science Workshop: Identifying Science to Meet Administration Priorities and the Needs of Our Stakeholders

Publications

Peak streamflow trends in Illinois and their relation to changes in climate, water years 1921–2020

This report characterizes changes in peak streamflow in Illinois and the relation of these changes to climatic variability, and provides a foundation for future studies that can address nonstationarity in peak-flow frequency analysis in Illinois. Records of annual peak and daily streamflow at streamgages and gridded monthly climatic data (observed and modeled) were examined across four trend perio
Authors
Mackenzie K. Marti, Thomas M. Over

Chlorophyll a in lakes and streams of the United States (2005–2022)

The concentration of chlorophyll a in phytoplankton and periphyton represents the amount of algal biomass. We compiled an 18-year record (2005–2022) of pigment data from water bodies across the United States (US) to support efforts to develop process-based, machine learning, and remote sensing models for prediction of harmful algal blooms (HABs). To our knowledge, this dataset of nearly 84,000 sit
Authors
Sarah Spaulding, Lindsay R.C. Platt, Jennifer C. Murphy, S. Alex. Covert, Judson Harvey

How to select an objective function using information theory

In machine learning or scientific computing, model performance is measured with an objective function. But why choose one objective over another? According to the information-theoretic paradigm, the “best” objective function is whichever minimizes information loss. To evaluate different objectives, transform them into likelihoods. The ratios of these likelihoods represent how strongly we should pr
Authors
Timothy O. Hodson, Thomas M. Over, Smith Tyler, Lucy A. Marshall

Science

A National Assessment of Pesticide, PFAS, Microplastic, and Antibiotic Resistance Gene Exposures in White-Tailed Deer

Research has documented exposures and consequential environmental health effects of pesticides, PFAS, microplastics, and antibiotic resistance genes in environmental biota. Little is known, however, regarding such effects in white-tailed deer ( Odocoileus virginianus ).
link

A National Assessment of Pesticide, PFAS, Microplastic, and Antibiotic Resistance Gene Exposures in White-Tailed Deer

Research has documented exposures and consequential environmental health effects of pesticides, PFAS, microplastics, and antibiotic resistance genes in environmental biota. Little is known, however, regarding such effects in white-tailed deer ( Odocoileus virginianus ).
Learn More

Groundwater Monitoring in McHenry County, Illinois

Groundwater Monitoring in McHenry County, Illinois
link

Groundwater Monitoring in McHenry County, Illinois

Groundwater Monitoring in McHenry County, Illinois
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Airborne Electromagnetic (AEM) Survey 2023 - Illinois River Basin

The U.S. Geological Survey (USGS) is conducting an Airborne ElectroMagnetic (AEM) Survey starting in late January 2023 and lasting three to four weeks. A helicopter towing a large hoop from a cable will begin making low-level flights over the Illinois River Basin, covering much of central Illinois and parts of northwest Indiana.
link

Airborne Electromagnetic (AEM) Survey 2023 - Illinois River Basin

The U.S. Geological Survey (USGS) is conducting an Airborne ElectroMagnetic (AEM) Survey starting in late January 2023 and lasting three to four weeks. A helicopter towing a large hoop from a cable will begin making low-level flights over the Illinois River Basin, covering much of central Illinois and parts of northwest Indiana.
Learn More

Multimedia

A USGS hydrologic technician prepares to lift an orange streamflow measuring device onto the ledge of a bridge.
Measuring flooding in the South Grand River in Urich, Missouri
Measuring flooding in the South Grand River in Urich, Missouri
A USGS hydrologic technician on a bridge guides an orange streamflow measuring device across a river to measure flooding
Measuring flooding in the South Grand River in Urich, Missouri
Measuring flooding in the South Grand River in Urich, Missouri
Paul H Rydlund
Paul new profile picture.
Paul new profile picture.
Video thumbnail reads: NGWOS AEMs for Illinois. Aerially Mapping The Illinois River Basin NGWOS AEMs For Illinois - Aerially Mapping the Illinois River Basin
NGWOS AEMs For Illinois - Aerially Mapping the Illinois River Basin
Video thumbnail reads: NGWOS AEMs for Illinois. Aerially Mapping The Illinois River Basin. Audio Description. NGWOS AEMs For Illinois - Aerially Mapping the Illinois River Basin (AD)
NGWOS AEMs For Illinois - Aerially Mapping the Illinois River Basin (AD)
Graphic of Gage Greatness bracket showing 16 gages from 8 water science centers.
Gage Greatness Bracket Round 1
Gage Greatness Bracket Round 1
Illinois River Basin Airborne Electromagnetic Study Area
Illinois River Basin Airborne Electromagnetic Survey Area
Illinois River Basin Airborne Electromagnetic Survey Area
Woman in orange vest, pink hat and camouflage outfit smiles behind hunted deer
NPS biological technician with white-tailed deer
NPS biological technician with white-tailed deer
Man and child in camouflage smiling for camera with hunted deer in foreground
USGS research biologist and son with white-tailed deer
USGS research biologist and son with white-tailed deer