Images

USGS employee sampling an urban monitoring well. Photo from USGS circular 1356 "Water Quality in the Mississippi Embayment-Texas Coastal Uplands Aquifer System and Mississippi River Valley Alluvial Aquifer, South-Central United States, 1994-2008."

USGS scientist taking a measurement at a groundwater well study site. Photo from USGS circular 1356 "Water Quality in the Mississippi Embayment-Texas Coastal Uplands Aquifer System and Mississippi River Valley Alluvial Aquifer, South-Central United States, 1994-2008."

Irrigation groundwater well. Photo from USGS circular 1356 "Water Quality in the Mississippi Embayment-Texas Coastal Uplands Aquifer System and Mississippi River Valley Alluvial Aquifer, South-Central United States, 1994-2008."

Irrigation water from a groundwater well on a rice crop field. Photo from USGS circular 1356 "Water Quality in the Mississippi Embayment-Texas Coastal Uplands Aquifer System and Mississippi River Valley Alluvial Aquifer, South-Central United States, 1994-2008."

Looking east to the Atlantic Ocean from Cadillac Mountain, Maine.

Squall line approaching freshwater marsh at Lacassine NWR, LA

Canyon Lake, November 2008. Photograph by Sam Price, U.S. Army Corps of Engineers.

SIR 2012–5202

Spring Lake in San Marcos, Texas, has hundreds of small springs underneath it.

A new website now provides important information about streamflow in the Comal and San Marcos Rivers and springflow at Comal and San Marcos Springs.

The Pembina River at Neche, ND looking downstream.

Red River of the North at Fargo, North Dakota in 2008.

This picture was taken while recovering passive atmospheric deposition samplers used to evaluate the nutrient loading of alpine lakes in Washington's National Parks.

Solar-powered streamgage in Swiftcurrent Creek at Many Glacier, Montana.

Looking downstream from the USGS streamgage on the Little South Pembina River near Walhalla, North Dakota.

Discrete samples collected from a near-shore accumulation of cyanobacteria (left) and an open-water area (right) in Cheney Reservoir, Kansas.

USGS gage 13039500 Henry's Fork near Lake ID.

Algae bloom near Cheney Reservoir Dam, Kansas.

Aerial view of a USGS dye tracer study done on the Kootenai River in Idaho.

Little Missouri River at Medora, North Dakota, with the badlands in the background.

Low flow with exposed rocks on the Knife River near Golden Valley, North Dakota.

View of the Spring Run near the gage, downstream of the main vent. 

Atlantic Ocean sunrise as seen from a Florida beach.