Images

Stream habitat measurement showing meter stick and gravelometer used to measure channel depths and particle sizes.

Bank height above the water surface is measured at each transect along a stream reach to estimate the channel and bed substrate as well as the type and size of sediment size that can be transported by the stream.

Hoan Bridge in Milwaukee, Wisocnsin with Lake Michigan in the background, taken from Inner Milwaukee Harbor.

These photos show various edge-of-field monitoring surface and subsurface monitoring sites, installation efforts, and runoff events across the Great Lakes basin.

These photos, taken before and after a grassed-waterway conservation practice was installed, show a change in the water clarity of agricultural runoff at an edge-of-field surface monitoring site in Wisconsin.

Sediment accumulation along a downstream concrete lined reach of the Kinnickinnic River, April 2016.

Both macro- and microplastics are contaminants of concern in freshwater environments. The drawing depicts the different types of plastics and the amorphous means by which they enter the Great Lakes environment. The backdrop is a conglomerate of different landscapes that represent the many different tributaries at which the study was conducted.

Milwaukee River Estuary, March 2016

Confluence of inner harbor and the Milwaukee River along North Riverwalk Way, leading into downtown Milwaukee, Wisconsin in early spring.

Backlit conference backdrop and stage and a row of seats in the foreground in a low-lit ballroom at the ESRI Federal GIS User Conference.

Photo of the Camp Manito-wish YMCA boat house on Lake Boulder, Wis.

Photo of Laboratory for Infectious Diseases and the Environment (LIDE).

Completed installation of test plots: permeable pavers (foreground), permeable concrete (midground), and permeable asphalt (background).

A USGS scientist crouches over a  seaplane float and collects a water sample from Turquoise Lake in Alaska.

Illustration created by Ben Siebers, USGS scientist, for journal article "Human and bovine viruses and bacteria at three Great Lakes beaches: Environmental variable associations and health risk".

Arsenic speciation analyses of groundwater samples using ARSOlux biosensor technology. Pictured (left to right), Dr. Mindy Erickson, US Geological Survey; Andreas Koelsch, Helmholtz Centre for Environmental Research; Emily Berquist, Minnesota Department of Health.

Example fluorescence amplification curves from a quantitative polymerase chain reaction (qPCR) analysis. By reviewing the fluorescence amplification curves, the concentration of the pathogen in the original sample can be back-calculated from the amount and number of cycles needed to reach the target concentration.

Joel Stokdyk, LIDE Biologist, prepares a sample for quantitative polymerase chain reaction (qPCR) analysis. qPCR uses fluorescence to quantify the detection of nucleic acids from a targeted pathogen.