Images

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

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.

Waterfall in Appalachian Forest

Massanutten Mountain in Virginia

Reston Microbiology laboratory personel Sampling a Stalagtite from the HErrenberg cave for the presence of bacteria.

USGS Stage-Discharge Relation Example.

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

Diagram of a typical streamgage installation with equipment used to measure stream stage (by L.S. Coplin, U.S. Geological Survey).

Benbrook Lake, December 2011. Photograph by Glenn Harwell, U.S. Geological Survey.

SIR 2012–5202

Colorado River, and Roaring Fork River confluence, Glenwood Springs, Garfield County, CO

Screen capture of GW_Chart and ModelMuse showing a time series of simulated river leakage.

Screen capture of ModelMuse with the words "Note that the symbol for the vertex is now a diamond insead of a square."

This image is inteded to be used as the thumbnail for a video.