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Crest stage gage at Root River at Grange Avenue
Crest stage gage at Root River at Grange Avenue
Crest stage gage at Root River at Grange Avenue
Scientists transferring material collected during microplastic sampling to glass mason jars.
Transferring material collected during microplastic sampling to jars
Transferring material collected during microplastic sampling to jars
Root River at Greenfield showing high flow damage
Root River at Greenfield showing high flow damage
Root River at Greenfield showing high flow damage
Root River at Greenfield showing high flow damage

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

Passive samplers, POCIS and mini-SPMDs deployed in stream
Passive samplers, POCIS and mini-SPMDs deployed in stream
Passive samplers, POCIS and mini-SPMDs deployed in stream
Passive samplers, POCIS and mini-SPMDs deployed in stream

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 (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 with multi-parameter water quality probe
Passive samplers with multi-parameter water quality probe
Passive samplers with multi-parameter water quality probe
Passive samplers with multi-parameter water quality probe

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.

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.

Surface water sampling for microplastics in Lake Michigan near Milwaukee, WI.
Surface water sampling for microplastics in Lake Michigan
Surface water sampling for microplastics in Lake Michigan
USGS scientist processing microplastic sample
USGS scientist processing microplastic sample
USGS scientist processing microplastic sample
USGS scientist processing microplastic sample

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.

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.

USGS scientist collecting velocity measurements and microplastic sampling at mid-depth within the water column
Scientist collecting velocity measurements and microplastic samples
Scientist collecting velocity measurements and microplastic samples
Scientist collecting velocity measurements and microplastic samples

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

An unmanned aquatic vehicle in action, partially submerged
Uncrewed underwater vehicle
Uncrewed underwater vehicle
Uncrewed underwater vehicle

The information collected by advanced technologies, like this uncrewed underwater vehicle, can be used by managers to sustain and support the Great Lakes’ valuable natural resources.

The information collected by advanced technologies, like this uncrewed underwater vehicle, can be used by managers to sustain and support the Great Lakes’ valuable natural resources.

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