The Bois de Sioux river channel near White Rock, SD.
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Bois de Sioux River
The Bois de Sioux river channel near White Rock, SD.
Bois de Sioux River
The Bois de Sioux river channel near White Rock, SD.
The Bois de Sioux river channel near White Rock, SD.
Bois de Sioux River
The Bois de Sioux river channel near White Rock, SD.
The Bois de Sioux river channel near White Rock, SD.
USGS Scientist at Work
Brent Knights and Jon Vallazza conduct a river productivity study aboard the E.D. Cope, Upper Mississippi River System.
Brent Knights and Jon Vallazza conduct a river productivity study aboard the E.D. Cope, Upper Mississippi River System.
Native American Salt Basins in the Sierra Nevada
Native Americans of the Miwok tribe in the northern Sierra Nevada, California carved these basins into the granite bedrock to produce salt for trade. They filled the basins with water from a salt spring and let the water evaporate, leaving a salt residue in the basin. The basins are about a meter in diameter and span the area of a football field.
Native Americans of the Miwok tribe in the northern Sierra Nevada, California carved these basins into the granite bedrock to produce salt for trade. They filled the basins with water from a salt spring and let the water evaporate, leaving a salt residue in the basin. The basins are about a meter in diameter and span the area of a football field.
Native American Salt Basins in the Sierra Nevada
Native Americans of the Miwok tribe in the northern Sierra Nevada, California carved these basins into the granite bedrock to produce salt for trade. They filled the basins with water from a salt spring and let the water evaporate, leaving a salt residue in the basin.
Native Americans of the Miwok tribe in the northern Sierra Nevada, California carved these basins into the granite bedrock to produce salt for trade. They filled the basins with water from a salt spring and let the water evaporate, leaving a salt residue in the basin.
Native American Salt Basins in the Sierra Nevada
Native Americans of the Miwok tribe in the northern Sierra Nevada, California carved these basins into the granite bedrock to produce salt for trade. They filled the basins with water from a salt spring and let the water evaporate, leaving a salt residue in the basin.
Native Americans of the Miwok tribe in the northern Sierra Nevada, California carved these basins into the granite bedrock to produce salt for trade. They filled the basins with water from a salt spring and let the water evaporate, leaving a salt residue in the basin.
Sunrise on the North Platte River
Sunrise on the North Platte River at Broadwater, Nebraska. Looking downstream from Hwy 92 bridge. January 2007.
Sunrise on the North Platte River at Broadwater, Nebraska. Looking downstream from Hwy 92 bridge. January 2007.
Establishing Fish Release Site on North Fork of Toutle River
Establishing a release site for salmonids implanted with radio transmitters. Behavior and movement of salmon are monitored as they migrate through the Toutle River.
Establishing a release site for salmonids implanted with radio transmitters. Behavior and movement of salmon are monitored as they migrate through the Toutle River.
Plankton Tow Analysis in Puget Sound
Collecting samples (sediment, aquatic vegetation, benthic invertebrates, zooplankton, forage fish, and predatory fish) to evaluate δ 15N ratios in the food web within Liberty Bay to evaluate urbanization effects on the nearshore ecosystem. (Coastal Habitats in Puget Sound program).
Collecting samples (sediment, aquatic vegetation, benthic invertebrates, zooplankton, forage fish, and predatory fish) to evaluate δ 15N ratios in the food web within Liberty Bay to evaluate urbanization effects on the nearshore ecosystem. (Coastal Habitats in Puget Sound program).
Prize Staghorn Sculpin of Puget Sound
Collecting samples (sediment, aquatic vegetation, benthic invertebrates, zooplankton, forage fish, and predatory fish) to evaluate δ 15N ratios in the food web within Liberty Bay to evaluate urbanization effects on the nearshore ecosystem. (Coastal Habitats in Puget Sound program).
Collecting samples (sediment, aquatic vegetation, benthic invertebrates, zooplankton, forage fish, and predatory fish) to evaluate δ 15N ratios in the food web within Liberty Bay to evaluate urbanization effects on the nearshore ecosystem. (Coastal Habitats in Puget Sound program).
Geo-locating a Well
GPS unit on well head at a private drinking water well.
GPS unit on well head at a private drinking water well.
Acidifying a Drinking Water Quality Sample for MTBE Analysis
Sample collected from Madison Springs Hut in the White Mountains (~ 5,000 ft above sea level).
Sample collected from Madison Springs Hut in the White Mountains (~ 5,000 ft above sea level).
Old Dug Well with Granite Top
Old dug well with granite top in front yard of home; currently uses drilled well.
Old dug well with granite top in front yard of home; currently uses drilled well.
Foggy Morning on the Sacramento River
This picture was taken at our juvenile Chinook tagging shed (old town Sacramento) looking upstream at our release location for our study.
This picture was taken at our juvenile Chinook tagging shed (old town Sacramento) looking upstream at our release location for our study.
Spiking a Quality Control Sample with MTBE
A scientist creates a quality control sample for a study of MTBE, (methyl tert-butyl ether) a fuel oxygenate used in gasoline.
A scientist creates a quality control sample for a study of MTBE, (methyl tert-butyl ether) a fuel oxygenate used in gasoline.
Determining Alkalinity of a Sample in the Field
Alk titration in the field as part of NAWQA studies.
Alk titration in the field as part of NAWQA studies.
Egret in Cypress Swamp
Many species of birds rely on wetlands such as this bald cypress swamp, one of the ecosystems currently being studied by scientists at the USGS NWRC.
Many species of birds rely on wetlands such as this bald cypress swamp, one of the ecosystems currently being studied by scientists at the USGS NWRC.
Reflections in Rainey Lake
Baldcypress forest along the banks of Rainey Lake, remnant of a dwindling habitat that is being studied by scientists at the NWRC.
Baldcypress forest along the banks of Rainey Lake, remnant of a dwindling habitat that is being studied by scientists at the NWRC.
Bald Cypress Trunk and Cavity
Bald Cypress trees are iconic symbols of wetlands, but their distribution and range may be vulnerable to climate change impacts.
Bald Cypress trees are iconic symbols of wetlands, but their distribution and range may be vulnerable to climate change impacts.
Insect trap on the Upper Mississippi River
USGS biological sampling trap collecting emerging insects to determine the quantity and quality of insects as potential food resources available to insect-eating birds.
USGS biological sampling trap collecting emerging insects to determine the quantity and quality of insects as potential food resources available to insect-eating birds.