Images

Stream gage equipment at Milwaukee River at Jones Island (04087170) site.

Turbid glacial runoff in roaring river, surrounded by mountains in Lake Clark National Park, Alaska.

Water sampling on the pontoon of a seaplane in Lake Clark National Park, Alaska.

Great Lakes tributaries deliver pathogens from many different sources. This drawing represents the various sources of these pathogens along with hydrologic, land cover, and season patterns by which they enter the Great Lakes tributaries. It references the virus sampling that took place with the backdrop based largely on the Milwaukee, WI.

Stream gage electronics inside gage at Root River at Grange Avenue (04087214).

Crest stage gage at Root River at Grange Avenue (04087214).

Snow covered tree overlooking the shoreline at the north side of Picnic Point in Madison, Wisconsin

USGS scientists transferring material collected during microplastic sampling to glass mason jars.

Artist rendition of pathogen contamination in a mixed land use watershed.

An assortment of Teflon equipment for trace metal sampling drying in a laminar flow hood.

Root River at Greenfield showing damage from powerful high flows that are common to many urban streams.

Passive samplers (on left: Polar Organic Chemical Integrative Sampler or “POCIS”; on right: mini-Semi-Permeable Membrane Devices or “SPMDs”) attached at depth in a stream for measurement of chemical contaminants.

Passive samplers (POCIS and mini-SPMDs) deployed in stream for assessment of chemical contaminants in the water; a multi-parameter water-quality probe (on left) measures water temperature, pH, and specific conductance during initial deployment.

USGS scientist collecting sediment core from Little Menomonee River, Milwaukee, WI.

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

USGS scientist processing microplastic sample. Large net is washed to move plastics down the large net to the detachable cod-end at bottom for transfer to glass mason jars.

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).