Images

Using ADCP (Acoustic Doppler Current Profiler) to measure current offshore on Long Island, NY.

Did you know that changes in the amount of water in aquifers cause small changes in Earth’s gravitational field? When the amount of groundwater in an aquifer changes, either by recharge or by discharge to surface water or wells, the gravitational acceleration at the land surface also changes.

The first USGS streamgage, at Embudo, New Mexico, just turned 125 years old.

USGS scientist Jamie Macy tracks the time-of-arrival of the pulse flow on March 24. 

RML Reston Microbiology Laboratory Gel Electrophoresis

USGS scientist Jeff Kennedy prepares to measure the change in gravity caused by changing aquifer storage for Minute 319 studies. 

RML Reston Microbiology Main laboratory

RML Reston Microbiology Laboratory Molecular Lab

Ice Jams in Redwater River near Vida, MT.

USGS scientist Jon Thomas collecting time-domain electromagnetic sounding in the Texas southern high plains to measure hydrogeologic properties below the land surface.

Ice Jams in Powder River at Arvada, WY, downstream of the bridge.

Robert Bradley, a hydrologic technician with the Massachusetts USGS Office, headed to Maine to experience a winter ice measurement trip with Laura Flight, a hydrologic technician from the Maine USGS Office.

USGS hydrologic technician Jim Caldwell uses an aluminum tube and scale to measure snow depth, snow water content and snow density as part of the Maine Cooperative Snow Survey. This survey is conducted throughout Maine in the spring to aid in the evaluation of flood potential by the Maine River Flow Advisory Commission.

ModelMuse screen capture to be used as a thumbnail for a video about creating meshes.

Screen capture of ModelMuse with the words "Objects are used to specify boundary conditions and observations."

This image is a screen capture of ModelMuse with the words "To define time schedules, select 'ModelSUTRA Time Controls.'"

Screen capture of ModelMuse with a visualization of the SUTRA permeability. The image is intended to be used as a thumbnail for a video.

Screen capture of ModelMuse with a mesh and the words "In SUTRA, some data are specified at nodes and some data are specified at elements."

ModelMuse screen capture with the text "This is the first of several videos that give an introduction to working with SUTRA in ModelMuse."

This video describes some of the most obvious changes to ModelMuse when working with SUTRA models.

This image shows a 3D SUTRA mesh that has layers that pinch out. The image is intended to be used as the thumbnail for a video.