Images

Brown patches and brown stems show stress in this phagmites (roseau cane) stand in Pass A Loutre Wildlife Management Area, a tract of state-owned land in Louisiana's bird foot delta, where the Mississippi River meets the Gulf of Mexico. An ongoing phragmites was first discovered in spring 2017 and blamed on an invasive scale insect from Asia.

USGS scientists measuring streamflow on Rapid Creek above Canyon Lake and collecting water-quality samples in May 2017.

Some single-celled green algae in the desmid family are symmetrical, with two halves joined by a bridge containing the cell’s nucleus. USGS biologist Barry H. Rosen and colleagues have been sampling desmids in Florida’s Loxahatchee National Wildlife Refuge for more than a year.

Shenandoah mobile laboratory fathead minnow experiment station

USGS employee Aaron Walsh performing wire weight measurement in record flood at gage 7018500 Big River at Byrnesville, MO

USGS hydrologic technician Christopher Rowden verifies the accuracy of streamgage information at the Jacks Fork River at Eminence, Missouri.

USGS hydrologic technician measures floodwaters along Flat Creek near Jenkins, Missouri using an Acoustic Doppler Current Profiling instrument. 

Adult alewife spring spawning migration at Stony Brook River in Brewster, Massachusetts. Credit: Michelle Staudinger

NJ Department of Environmental Protection scientists collecting smallmouth bass from the Delaware River near Lambertville, NJ.

Early this morning the lava lake level was measured at 12.5 m (41 ft) below the vent rim, the highest level the lake reached this month. But, at around 8:30 a.m., summit inflation switched to deflation and the lava lake level began to drop.

USGS scientists are working alongside University researchers in Alaska to understand how groundwater and permafrost conditions change over time due to seasonal variations and climate change. View down the oil pipeline through one April 2017 study area. (April 2017)

Research Hydrologist Neil Terry (USGS) collects ground-penetrating radar (GPR) data along an oil pipeline in Alaska. (April 2017)

Helicopters are often used to carry scientists and equipment to remote study areas in Alaska. In this photo, a ground-penetrating radar (GPR) unit is securely strapped to the side of the helicopter. (April 2017)

Research Hydrologist Martin Briggs (USGS) tows ground-penetrating radar (GPR) during field work in Alaska. (April 2017)

Research Hydrologist Martin Briggs (USGS) collects ground-penetrating radar (GPR) data. He is wearing special ice cleats on his shoes to have better traction walking on the ice. (April 2017)

USGS Research Geophysicist Andy Kass (left, in orange) adjusts surface nuclear magnetic resonance equipment (NMR) with input from collaborators Eliot Grunewald (Vista Clara), Alex Huryn (University of Alabama), and Patrick Hendrickson (University of Colorado). NMR is being used to measure the distribution of liquid water in the subsurface. (April 2017)

View of Grand Bay, Mississippi marsh shoreline in April 2017.

Mount St. Helens monitoring station SEP buried in about 10-15 ft of snow. Station stands approximately 8 ft tall and is located to the right of the person in this photo. April 21, 2018

Mount St. Helens monitoring station SEP during temporary installation of a 20 foot mast to restore data flow after heavy snow buried the site and cut off seismic data transmission.

Phenolic mount used to deploy an RDI ChannelMaster 600kHz ADVM.  Mount is resistant to corrosion and is articulated to allow adjustment of heading, pitch, and roll.

Phenolic mount used to deploy an RDI ChannelMaster 600kHz ADVM.  Mount is resistant to corrosion and is articulated to allow adjustment of heading, pitch, and roll.