Images

Shaded relief image of Vineyard Sound, MA Shoals

USGS technicians prepare a sediment trap to sample the sea floor off Cape Hatteras.

USGS research chemist John Pohlman samples seep gas through ice in Lake Qalluuraq, located in continuous permafrost approximately 97 kilometers (60 miles) south of Barrow, Alaska.

A sonar on a bottom platform while steaming to the deployment site in the Columbia River in 2013.  The 3 platforms acquired data on currents and sediment transport at the river mouth over several months.

Sandy Brosnahan transporting a weather buoy into the Woods Hole Coastal and Marine Science Center’s operational facility to continue the process of getting it ready to deploy.  This buoy was one of 6, deployed by John Warner and others, to measure wind speed, direction, pressure, and temperature off the coast of Fire Island, NY.  Paired with each weather b

Huron River at Milan, OH - running levels

USGS streamflow station 01048000 (Sandy River near Mercer, Maine) is shown during an early morning site visit in October 2013.

Photograph of the shoreline of Mary Dunn Pond, Barnstable, Massachusetts.

Gravel bar and Ashokan Reservoir, NY

This photograph shows Lowe's Bridge off ME-15 in Guilford, Maine, spanning the Piscataquis River. USGS gaging station 01031500 is located on the downstream side of the bridge.

Ashokan Reservoir, NY at sunset

GPS base station with sunset over the Ashokan reservoir, NY

Raindrops falling on Long Island body of water

Damaged pier from effects of Hurrican Sandy on Long Island, NY.

This ADCP sends an acoustic pulse into the water to measure the speed of the water, the depth of the river and to measure how far it's moved across the river. With this information, it can compute discharge.

This is the cross section where the measurement was made and the line we strung across the river, marked with flagging for visibility. In slow velocities, the line helps control the speed of the boat as it is moved across the channel.

This is the view upstream of the cross section.

This is the view downstream of the cross section.

A manned boat is used to ferry the ADCP back and forth across the river. The velocities at this section were quite slow, and the line across the river allowed better control than driving the small boat.

Another view of the manned boat, with ADCP attached.

Sediment sampling off the coast of Long Island, NY.