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On July 13, 2022, USGS scientists collected water quality samples at 3 sites in support of a study on eutrophication in the Grand Calumet River Area of Concern. The site pictured here is 413704087153501 Grand Calumet Lagoon at Marquette Park at Gary, IN, which was the background site for the study. Samples were collected for nutrients and isotopes.
On July 13, 2022, USGS scientists collected water quality samples at 3 sites in support of a study on eutrophication in the Grand Calumet River Area of Concern. The site pictured here is 413704087153501 Grand Calumet Lagoon at Marquette Park at Gary, IN, which was the background site for the study. Samples were collected for nutrients and isotopes.
Two floats constructed of polyvinyl chloride (PVC) and polyethylene foam (pool noodles) float in a pool among lily pads. The floats each hold water quality sondes that collect data continuously. On the float on the left you can see the sonde hanging from the cross pieces, on the right-hand float the sondes are encased in the capped PVC tubes.
Two floats constructed of polyvinyl chloride (PVC) and polyethylene foam (pool noodles) float in a pool among lily pads. The floats each hold water quality sondes that collect data continuously. On the float on the left you can see the sonde hanging from the cross pieces, on the right-hand float the sondes are encased in the capped PVC tubes.
Algal mats are floating on the surface of the water. This site is in the Grand Calumet River Area of Concern and has been dredged and capped to try to remediate pollution from historic industrial activity.
Algal mats are floating on the surface of the water. This site is in the Grand Calumet River Area of Concern and has been dredged and capped to try to remediate pollution from historic industrial activity.
These images show grass carp larvae from the Maumee River. Characteristics of larval grass carp include overall length (left), skeletal muscle development (center) and presence of an eye spot that lacks pigmentation (right; pigment starting to develop on lower eye).
These images show grass carp larvae from the Maumee River. Characteristics of larval grass carp include overall length (left), skeletal muscle development (center) and presence of an eye spot that lacks pigmentation (right; pigment starting to develop on lower eye).
Photo of Tahquamenon River, MI
Toxic Substances and Areas of Concer
Photo of Tahquamenon River, MI
Toxic Substances and Areas of Concer
A photograph of U.S. Geological Survey (USGS) custom automated pathogen sampler (top) and schematic illustrating the remote-unattended-automated pathogen sampler (bottom). Sample collection proceeds over the course of a runoff-event or low-flow period for up to a maximum of 5 days before a site visit by personnel is needed to collect the samples.
A photograph of U.S. Geological Survey (USGS) custom automated pathogen sampler (top) and schematic illustrating the remote-unattended-automated pathogen sampler (bottom). Sample collection proceeds over the course of a runoff-event or low-flow period for up to a maximum of 5 days before a site visit by personnel is needed to collect the samples.
Veiw of the Great Lakes from space on the ISS
Veiw of the Great Lakes from space on the ISS
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 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.
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.