Images

Sample of dragonfly larvae in water in bottom of zip-lock plastic bag, held at horizon level with lake. At Sand Point Lake in Voyageurs National Park.

Installing stream monitoring equipment on a tributary to Grizzly Bear Creek, May 9, 2012. Water-quality sampling of groundwater and surface water was conducted during 2011-15 at Mount Rushmore National Memorial to characterize the occurrent of perchlorate and selected metals commonly associated with fireworks.

Sandstone ledges in the Escondido Formation located approximately 7 miles south-southeast of the community of D’Hanis in Medina County, Texas. Photograph taken April 13, 2012, by Robert R. Morris.

SIR 2013–5149

The image shows a screen capture of the ModelMuse main window along with the caption "OK this is the final concentrations."

Kerry Caslow cleaning a water quality sonde that is outfitted with probes for continuous monitoring of water temperature, specific conductance, and turbidity. It is imperative that the sondes be regularly maintained so that the data, which is published online in realtime, is always accurate.

Paul Ankcorn takes a discharge measurement on the Chattooga River, Georgia.

USGS employee Paul Ankorn making a discharge measurement at USGS gage 02177000 Chattooga River near Clayton, GA.

USGS scientist Paul Ankcorn takes a discharge measurement near USGS streamgage 02177000 CHATTOOGA RIVER NEAR CLAYTON, GA.

Photograph showing outcrop of eroded and dissected extinct volcano located adjacent to the Frio River and east of the city of Uvalde in Uvalde County, Texas. Basalt is remnant of volcanic neck, and adjacent to the basalt is pyroclastic material ranging from fine-grained material to volcanic bombs, which formed the slope of the volcano.

West Fork of North Branch Chicago River at Northbrrok, IL.

USGS hydrologist Hannah Ingleston extracting cations from soil samples using an ammonium chloride method.

Open Field Near Blue Ridge Parkway

Pitcher plant, Sarracenia purpurea leaves filled with water in a bog in northern Florida.

Karstic caves represent one of the most important subterranean carbon storages on Earth and provide windows into the subsurface. In the newly discovered Herrenberg Cave, Germany, Denise Akob and others were involved in investigating the diversity and potential role of bacteria in carbonate mineral formation (Rusznyak et al. submitted).

Mississippi River flooding map

Missouri River site map for summer 2011 flood

Satellite image of Tropical Storm Lee

Drought Conditions in the lower Apalachicola-Chattahoochee-Flint River Basin in July 2011: USGS measured streamflow at 267 sites in the lower ACF Basin and western and central parts of the Aucilla–Suwanee–Ochlockonee River basin during July 2011 to measure the effects of drought and irrigation withdrawals on streamflow.

Hurricane Irene storm surge map

Waterfall in Appalachian Forest

Massanutten Mountain in Virginia