Images

The Herrenbergberg Cave in Germany was discovered during the process of digging a new high speed train tunnel. Before its discovery, it was isolated from the surface.

USGS employee sampling a groundwater well. Photo from USGS circular 1358 "Water Quality in Basin-Fill Aquifers of the Southwestern United States: Arizona, Californian, Colorado, Nevada, New Mexico, and Utah, 1993-2009.

USGS employee sampling an urban  groundwater well. Photo from USGS circular 1352 "Water quality in the Glacial Aquifer System, Northern United States, 1993 - 2009.

USGS scientist sampling recharged groundwater beneath an agricultural field. Photo from USGS circular 1352 "Water quality in the Glacial Aquifer System, Northern United States, 1993-2009".

Choctawhatchee River and gage in late December flood looking downstream. 

Wright's Creek gage and flood. 

USGS employees release radio-tagged salmon smolts into the Columbia River below the sluiceway outfall at The Dalles Dam.

USGS Gage house reflected in Cedar Creek near Haynes, North Dakota.

Sampling terrace deposits above the Cheyenne River in South Dakota. Terrace deposits are serving as background readings for a sediment contamination study (Huron/Rapid City, SD, Water Science Centers). Kevin Baker is collecting samples in the trench. John Stamm is taking notes.

USGS employees conduct water quality sampling with DH-81: USGS gage 02335870 Sope Creek near Marietta, GA.

Ryan Beaulin and Greg Goodwin (USGS Central Midwest Water Science Center) conduct water-quality sampling on the Illinois River, downstream of Marseilles, Illinois.

ADCP work for a Waste Water Treatment Plant Study.  Photo taken south of St. Paul, MN on the Mississippi River (Mounds View, MN, Water Science Center).

Screen capture of ModelMuse and its help.

The image is intended to be used to introduce a video.

In 2009, USGS had a test plot professionally sealed with coal-tar-based sealcoat in preparation for measurements of volatilization from the pavement after application. Here, the newly applied sealcoat is black and shiny.

In 2009, USGS had a test plot professionally sealed with coal-tar-based sealcoat in preparation for measurements of volatilization from the pavement after application.

In 2009, USGS had a test plot professionally sealed with coal-tar-based sealcoat in preparation for measurements of volatilization from the pavement after application. Here, the applicator applies the sealcoat to the parking lot.

In 2009, USGS had a test plot professionally sealed with coal-tar-based sealcoat in preparation for measurements of volatilization from the pavement after application. Here, the applicator checks the tank.

The Souris River above Minot, ND

Screen capture of ModelMuse with colored grid.

The image is intended to introduce a video.

Lakes are an important component of the natural water cycle

Garbage that has accumulated at a dock on the edge of the Great Lakes. This type of pollution is one of the ways contaminants and pathogens enter the Great Lakes and pose human health concerns.