Images

2009 Red River flooding in Grand Forks, North Dakota

Stream in Shenandoah National Park, Virginia.

Prairie Creek nr. Silver Creek is a tributary of the Platte River. The photo was taken to capture Autumn's colors amplified by water.

A USGS technician finishes construction on a monitoring station used to monitor surface salinity and temperature below Faka Union Canal Weir #1, Florida. By measuring hydrologic conditions here, researchers found that freshwater flow rates help maintain warm water pockets in downstream areas of the canal.

Stream near Pocosin weather station site, Shenandoah National Park.

Great Lakes water availability studies conducted by the U.S. Geological Survey aim to help characterize how much water the Basin has now, how water availability is changing, and how much water it can expect to have in the future.

Great Lakes water availability studies conducted by the U.S. Geological Survey aim to help characterize how much water the Basin has now, how water availability is changing, and how much water it can expect to have in the future.

Great Lakes water availability studies conducted by the U.S. Geological Survey aim to help characterize how much water the Basin has now, how water availability is changing, and how much water it can expect to have in the future.

The Cannonball River at Breien, ND looking East.

Cannonball River at Breien, ND looking west.

Diatoms are algae that reflect the biotic condition of streams, lakes and estuaries. Diatoms are important indicator organisms because they are sensitive to natural and human impacts, and monitoring their condition provides information about ecosystem health. A scanning electron micrograph (SEM) shows one valve of an unusual species within the genus Aneumastus.

Turner Falls, the largest waterfall in Oklahoma, near Davis, Oklahoma. Springs discharging from the Arbuckle-Simpson aquifer into Honey Creek are the source of water to Turner Falls.

Flooded gaging station on the Souris River near Westhope, North Dakota, April 20, 2011.  See other pictures in this gallery with the tag 05124000 to see what the gage house normally looks like - it is on a raised platform on the bank of the river with an access road next to it.

The Coachella Canal is an aqueduct that diverts water from the Colorado River to the Coachella Valley, making possible the extensive agriculture production that drives the economy in this arid region of the United States.

Scientists electrofish low-salinity shorelines, Tarpon Bay, Everglades National Park.

Benthos sampling at Crane Creek, OH.

Solomon Gulch Top of Falls gage house in spring.

Hydrographer C.S. Couvillion drilling Willow Creek for ice discharge measurement.

Weather Station on Tern Island in the middle of Crump Lake protected by bird spikes.

Multiple generations of Salish Sea Tribal members land at the Swinomish Indian Reservation.

Arrival of Salish Sea Tribal Canoes with USGS water quality sampling instrumentation onboard.