Images

Nicole Casamassina making a streamflow measurement with an Acoustic Doppler Current Profiler (ADCP) at USGS 01304500 PECONIC RIVER AT RIVERHEAD NY (Credit: Amy Simonson, USGS NY WSC, Public domain.)

USGS scientists investigate trees knocked over by the tsunami at the mouth of Taan Fjord. Flow depth here was likely 5 m based on the height of branches stripped off trees in the background. This event had the 4th highest tsunami runup ever recorded.

USGS scientists conducting a study on the Great Salt Lake to gain a better understanding of nutrient levels, which could help determine how to best manage algal bloom outbreaks.

USGS scientists conducting a study on the Great Salt Lake to gain a better understanding of nutrient levels, which could help determine how to best manage algal bloom outbreaks.

USGS scientists prepare water-quality instruments before going out on the Great Salt Lake. USGS scientists are conducting a study to gain a better understanding of nutrient levels, which could help determine how to best manage algal bloom outbreaks.

A dragonfly in the wetlands in Southeast/Central ND - Stutsman and Kidder counties, ND in grassland and on farms. 

A plume of volcanic gas and ash rises from a vent on the east side of Halema`uma`u Crater, at the summit of Kīlauea caldera. The Hawaiian Volcano Observatory and Jaggar Museum of Volcanology are in the foreground.

Eagle Creek at Zionsville, IN - Flowtracker measurement

Eagle Creek at Zionsville, IN - low flow

Rocks from the east rim of Kīlauea Volcano's summit vent fell into the lava lake at 10:02 p.m., HST, on Saturday, August 6, triggering an explosive event that hurled fragments of molten and solid rock onto the rim of Halema‘uma‘u Crater.

Main hydrothermal features of the new (2016) 3-D model of the subsurface at Long Valley Caldera. This schematic is based on a survey of the electrical properties of the earth (magnetotellurics) below. Arrows show subsurface water flow, with colors keyed to changing water temperature, from blue (cold) to red (hot). Purple arrows show an extinct hot water pathway.

Corbett's Glen Nature Park, Town of Brighton, Monroe County, New York.  This was one of the sampling sites for the USGS Norheastern Stream Quality Assessment (NESQA).

Physical Scientist, Pete Lenaker, collecting a water column microplastic sample while measuring water velocity at streamgage 040870837 MENOMONEE RIVER AT RIDGE BLVD AT WAUWATOSA, WI. 

Allen Creek, near the Town of Brighton, New York, flows over rock, creating the stunning Postcard Falls at Corbett's Glen Nature Park. Learn about the water quality of Allen Creek and other Northeast streams studied by the USGS Northeast Stream Quality Assessment here.

USGS scientists Christopher L. Shope, Bryan Downing, Katy O'Donnell and Mike Freeman measure nutrient levels in Goggin Drain, Utah. USGS scientists are conducting an experimental study on two Utah water bodies to gain a better understanding of nutrient levels, which could help determine how to best manage algal bloom outbreaks.

USGS scientist Mike Freeman measures nutrient levels in Goggin Drain, Utah. USGS scientists are conducting an experimental study on two Utah water bodies to gain a better understanding of nutrient levels, which could help determine how to best manage algal bloom outbreaks.

USGS scientists Christopher L. Shope, Bryan Downing, Katy O'Donnell and Mike Freeman measure nutrient levels in Goggin Drain, Utah. USGS scientists are conducting an experimental study on two Utah water bodies to gain a better understanding of nutrient levels, which could help determine how to best manage algal bloom outbreaks.

USGS scientists use multiple high-frequency water quality instruments contained in a cage to measure nutrients and algal changes in surface water. Scientists are conducting an experimental study on two Utah water bodies to gain a better understanding of nutrient levels, which could help determine how to best manage algal bloom outbreaks.

USGS scientists Bryan Downing, Mike Freeman and Katy O'Donnell measure nutrient levels in Goggin Drain, Utah. USGS scientists are conducting an experimental study on two Utah water bodies to gain a better understanding of nutrient levels, which could help determine how to best manage algal bloom outbreaks.

On June 28, 2016, a 4,000-foot-high mountainside in Glacier Bay National Park and Preserve collapsed, sending rocky debris equivalent to 60 million mid-size SUVs tumbling onto nearby Lamplugh Glacier.

Adult and juvenile beaver near Windrose, Oregon