Images

Surface water sampling for microplastics in Lake Michigan near Milwaukee, WI.

Custom-designed net for sampling microplastics at depth, Lake Michigan.

USGS scientist collecting velocity measurements and microplastic sampling at mid-depth within the water column, Menomonee River.

Crest stage streamgage at Lincoln Creek at Sherman Boulevard at Milwaukee, Wisconsin. https://waterdata.usgs.gov/monitoring-location/040869416

Sediment core from Kinnickinnic River.

Stream habitat data is collected along a series of transects marked by tape measure and includes estimating rock size categories (for example, sand, gravel, cobble, boulders) with a guide (shown).

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.

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

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

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.

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

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.

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).