Images

Illustration of the water cycle. Prepared by James R. Douglas, USGS. Published in USGS Circular 1383G: USGS Water Science Strategy—Observing, Understanding, Predicting, and Delivering Water Science to the Nation.

Two of the main spring discharge points of Comal springs.

A new website now provides important information about streamflow in the Comal and San Marcos Rivers and springflow at Comal and San Marcos Springs.

Looking northeast along the Bear River Duck Club Canal toward the Wellsville Mountains. 

Mixing of drill cuttings with absorbent polymer prior to shipping and disposal in a secured landfill.

Overlooking Lake Mead. 

Scientists apply a new method for determining the fate of methane discharged into streams. Here, noble-gas (krypton) is injected using submerged gas-permeable tubing in West Bear Creek, North Carolina. 

Inside look of a gorge in Lake Mead.

Scientists apply a new method for determining the fate of methane discharged into streams. Here, gas is injected into stream water along West Bear Creek, North Carolina. 

USGS hydrologic technician Amy Simonson surveying a high-water mark on Liberty Island, New York after Hurricane Sandy

An Appalachian Mountain Stream in the Spring. Photographed by Samuel H Austin

USGS Water towers at Upper Midwest Environmental Sciences Center

2012 SPARROW Models for the Midwest: Total Phosphorus, Total Nitrogen, Suspended Sediment, and Streamflow

USGS collects groundwater from shallow monitoring wells beneath​ agricultural and urban areas to assess the effects of these activities​ on recently recharged groundwater as part of the National Water Quality Network (NWQN).

Black tape is stretched across the stopper of the 'Niskin' bottle and secured to form a positive pressure seal.

Humpback Rocks Views

Predicted concentrations of arsenic in groundwater exceed the Maximum Contaminant Level (MCL) of 10 μg/L in 43 percent of the areal extent of the four Southwest basin-fill aquifers.

Tom Kehler, fishery biologist at the U.S.

Dried acid mine drainage residuals that are formed during treatment of the drainage.  The USGS has pioneered a new use for these residuals that are currently a disposal challenge, using them to filter phosphorus from agricultural and municipal wastewaters.

Liberty State Park, Jersey City, NJ; Chad Ostheimer surveying a high-water mark left October 29, 2012 by Hurricane Sandy.

Hurricane Sandy struck the New Jersey shore Oct. 29-31, 2012. Houses, cars and a street in Seaside Heights, NJ were covered in beach sand after Hurricane Sandy's storm tide receded.

Hurricane Sandy struck the New Jersey shore Oct. 29-31, 2012. This house in Mantoloking, NJ was partly collapsed after Hurricane Sandy's storm tide receded.