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Left: Distillation rig used in the measurement of microbial sulfate reduction rates associated with a method based on the incubation of sediment samples with radioactively labeled sulfate. Photographer: M. Marvin-DiPasquale. Date: 3/5/2001.
Left: Distillation rig used in the measurement of microbial sulfate reduction rates associated with a method based on the incubation of sediment samples with radioactively labeled sulfate. Photographer: M. Marvin-DiPasquale. Date: 3/5/2001.
USGS hydrographers collecting a water-quality sample at the Zumbro River near Rochester, Minnesota
USGS hydrographers collecting a water-quality sample at the Zumbro River near Rochester, Minnesota
A professional applicator applies coal-tar-based sealcoat to a test plot used to measure emission of polycyclic aromatic carbons (PAHs) into the air.
A professional applicator applies coal-tar-based sealcoat to a test plot used to measure emission of polycyclic aromatic carbons (PAHs) into the air.
The team of USGS scientists collected stream water samples before and after rainfall events for this study. In this photo a USGS scientist is taking measurements of field parameters (dissolved oxygen, water temperature, specific conductance, and pH) from New York Branch, Iowa, at low flow (baseflow) conditions.
The team of USGS scientists collected stream water samples before and after rainfall events for this study. In this photo a USGS scientist is taking measurements of field parameters (dissolved oxygen, water temperature, specific conductance, and pH) from New York Branch, Iowa, at low flow (baseflow) conditions.
View of stream water following a manure spill, which has strongly discolored the water.
View of stream water following a manure spill, which has strongly discolored the water.
Upper workings of the Pennsylvania Mine in the headwaters of Peru Creek, Colorado.
Upper workings of the Pennsylvania Mine in the headwaters of Peru Creek, Colorado.
Mountain Sheep Spring, Arizona, is one of the 37 springs north of the Grand Canyon near areas of breccia-pipe uranium mining that U.S. Geological Survey (USGS) scientists studied.
Mountain Sheep Spring, Arizona, is one of the 37 springs north of the Grand Canyon near areas of breccia-pipe uranium mining that U.S. Geological Survey (USGS) scientists studied.
This cyanobacterium has radiating filaments and basal heterocysts. Green is Sytox Green (a DNA stain that is excluded from live cells).
This cyanobacterium has radiating filaments and basal heterocysts. Green is Sytox Green (a DNA stain that is excluded from live cells).
Schmutz Spring, Arizona, is one of the 37 springs north of the Grand Canyon near areas of breccia-pipe uranium mining that U.S. Geological Survey (USGS) scientists studied.
Schmutz Spring, Arizona, is one of the 37 springs north of the Grand Canyon near areas of breccia-pipe uranium mining that U.S. Geological Survey (USGS) scientists studied.
Pigeon Canyon in northern Arizona is just north of the Grand Canyon. Here, Pigeon Spring emerges in Pigeon Canyon just before it merges with Snake Gulch in northern Arizona.
Pigeon Canyon in northern Arizona is just north of the Grand Canyon. Here, Pigeon Spring emerges in Pigeon Canyon just before it merges with Snake Gulch in northern Arizona.
USGS scientists installing passive sediment samplers in an irrigation ditch near Hancock, Wisconsin. The samplers are designed to collect suspended sediment from streams over a 3-week period.
USGS scientists installing passive sediment samplers in an irrigation ditch near Hancock, Wisconsin. The samplers are designed to collect suspended sediment from streams over a 3-week period.
USGS scientist collecting water samples from an amphibian monitoring site in Livermore, California.
USGS scientist collecting water samples from an amphibian monitoring site in Livermore, California.
USGS scientist collecting water samples for pesticide analysis at Woodward Resevoir Pond near Oakdale, California.
USGS scientist collecting water samples for pesticide analysis at Woodward Resevoir Pond near Oakdale, California.
This photo shows a snow plow and road salt application truck that is used to clear snow and ice from roadways for improving traffic and pedestrian safety. The use of salt to deice pavement can be harmful to aquatic life in urban streams. The USGS is involved in studies that focus on the influence of winter runoff on aquatic ecosystems.
This photo shows a snow plow and road salt application truck that is used to clear snow and ice from roadways for improving traffic and pedestrian safety. The use of salt to deice pavement can be harmful to aquatic life in urban streams. The USGS is involved in studies that focus on the influence of winter runoff on aquatic ecosystems.
Scanning electron microscopy (SEM) image of diatoms with zinc oxide (ZnO) nanoparticles. U.S. Geological Survey (USGS) scientists are studying the linkages between contaminant bioavailability and toxicity, especially in aquatic organisms exposed to metals and metallo-nanomaterials through solution and diet.
Scanning electron microscopy (SEM) image of diatoms with zinc oxide (ZnO) nanoparticles. U.S. Geological Survey (USGS) scientists are studying the linkages between contaminant bioavailability and toxicity, especially in aquatic organisms exposed to metals and metallo-nanomaterials through solution and diet.
USGS scientists processing samples of combined sewer overflow water collected after a storm. The samples were analyzed for selected wastewater-related chemicals.
USGS scientists processing samples of combined sewer overflow water collected after a storm. The samples were analyzed for selected wastewater-related chemicals.
USGS scientist dissecting a fish to determine possible effects from exposure to endocrine disrupting contaminants.
USGS scientist dissecting a fish to determine possible effects from exposure to endocrine disrupting contaminants.
The set up and equipment used for the bioaugmentation experiment at a fractured-rock contamination site. The site is contaminated with trichloroethene (TCE). The bladders contain the solutions that were injected into the subsurface. The injection well is right in front of the blue barrel.
The set up and equipment used for the bioaugmentation experiment at a fractured-rock contamination site. The site is contaminated with trichloroethene (TCE). The bladders contain the solutions that were injected into the subsurface. The injection well is right in front of the blue barrel.
USGS scientist dissecting a summer flounder. Science Feature that the image was used on was Pesticides Common in California Estuary
USGS scientist dissecting a summer flounder. Science Feature that the image was used on was Pesticides Common in California Estuary
U.S. Geological Survey (USGS) scientist Dr. Diann J. Prosser examining a ruddy shelduck in China. Dr. Diann J. Prosser was awarded the Presidential Early Career Awards for Scientists and Engineers (PECASE).
U.S. Geological Survey (USGS) scientist Dr. Diann J. Prosser examining a ruddy shelduck in China. Dr. Diann J. Prosser was awarded the Presidential Early Career Awards for Scientists and Engineers (PECASE).
Deposit of iron-cemented stream gravel (ferricrete) with embedded wood fragments that can be age dated using radiocarbon to determine the age of the ferricrete deposit. Knowing the age of the ferricretes helps scientists determine if the associated enrichment of metals in streams occurred before or after mining in the watershed started.
Deposit of iron-cemented stream gravel (ferricrete) with embedded wood fragments that can be age dated using radiocarbon to determine the age of the ferricrete deposit. Knowing the age of the ferricretes helps scientists determine if the associated enrichment of metals in streams occurred before or after mining in the watershed started.