Images

Researcher holding several Potamocorbula amurensis in an outstretched hand during a sampling trip aboard the R/V Polaris.

View of the White Cliffs in the evening light from a location about 500 ft. upstream of the USGS gage. 

U.S. Geological Survey streamflow-gaging station 08116650 Brazos River near Rosharon, Texas, looking upstream from right bank, August 7, 2008.
USGS SIR 2009–5174

U.S. Geological Survey streamflow-gaging station 08116650 Brazos River near Rosharon, Texas, looking upstream from FM 1462 bridge, August 7, 2008.
USGS SIR 2009–5174

U.S. Geological Survey streamflow-gaging station 08116650 Brazos River near Rosharon, Texas, looking downstream from FM 1462 bridge, August 7, 2008.
USGS SIR 2009–5174

U.S. Geological Survey streamflow-gaging station 08114000 Brazos River at Richmond, Texas, looking upstream from eastbound U.S. Highway 90-A bridge, August 7, 2008.
USGS SIR 2009–5174
http://pubs.usgs.gov/sir/2009/5174/

U.S. Geological Survey streamflow-gaging station 08114000 Brazos River at Richmond, Texas, looking downstream from eastbound U.S. Highway 90-A bridge, August 7, 2008.
USGS SIR 2009–5174
http://pubs.usgs.gov/sir/2009/5174/

U.S. Geological Survey streamflow-gaging station 08114000 Brazos River at Richmond, Texas, looking downstream from eastbound U.S. Highway 90-A bridge, August 7, 2008.
USGS SIR 2009–5174

Artistic canoes used during the 2008 Coast Salish Annual Canoe Journey. 

The longear sunfish is a freshwater fish in the sunfish family. An increase in sunfish in southeastern streams, intentionally stocked or unintentionally transplanted, has caused the composition of fish species among streams in the Southeast to become more similar. Such homogenization of species is an emerging and pervasive threat to biodiversity.

USGS scientist John Shelton using high-tech hydroacoustic equipment to measure the depth and velocity of the Congo River.

Solar powered streamgage to transmit real-time data at Grinnell Creek at Grinnell Glacier, Glacier National Park.

To ensure that Great Lakes beaches are safe for public recreational use, USGS GLSC researchers have ongoing beach monitoring programs in place.

James River by Arrowwood National Wildlife Refuge. The picture was taken from the scenic view site to the North and above headquarters.

Jim Lake drawdown channel, looking south. Photograph from Humpback Road. The downstream Jamestown Reservoir was filled in 1965 and backed water onto the Arrowwood National Wildlife Refuge, preventing ideal management in most years.

Jim Lake drawdown channel looking north. Photograph taken from 17th Street SE between Pingree, North Dakota, and State Highway 20. The downstream Jamestown Reservoir was filled in 1965 and backed water onto the Arrowwood National Wildlife Refuge, preventing ideal management in most years.

Mud Lake Channel from Arrowwood Lake to Jim Lake, looking toward Arrowwood Lake. Photograph taken from 11th Street SE between Edmunds, North Dakota, and State Highway 9. The downstream Jamestown Reservoir was filled in 1965 and backed water onto the Arrowwood National Wildlife Refuge, preventing ideal management in most years.

Photo of Rock River, looking west-southwest, June 21, 2008.

Biological sampling devices are deployed on the upper Mississippi River to collect invertebrates for science. Each sampler is attached to a floating buoy and multiple samplers are placed together near a wing dam structure on the river to study the river's food web and productivity.

High bank and flood plain of Short Creek (a tributary of the Souris River in North Dakota) below International Boundary near Roche Percee, Saskatchewan, Canada.

Short Creek (a tributary of the Souris River in North Dakota) below International Boundary near Roche Percee, Saskatchewan, Canada.