Images

This image is a screen capture of ModelMuse with the words "This video will give a brief example of how to use MODPATH with ModelMuse." It is intended to be used as the thumbnail image for a video.

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.

Pruitt Buffalo National River

A columnar ice spike is observed developing between the ice mounds and weir at Apple Creek. Flow is 20.5 cubic feet per second.

Marker (3' 10") stands next to ice spike at Apple Creek near Menoken, North Dakota.

When ice-rich permafrost thaws, former tundra and forest turns into a thermokarst lake as the ground subsides. The carbon stored in the formerly frozen ground is consumed by the microbial community, who release methane gas. When lake ice forms in the winter, methane gas bubbles are trapped in the ice.

USGS sampled water quality at this location on Chickasawhatchee Creek, Terrell County, Georgia.

Hydrologists Carole Johnson and Alton Anderson (USGS) prepare a borehole nuclear magnetic resonance (NMR) tool for logging.

USGS scientists J. Alton Anderson and Dennis W. Risser prepare to collect a full-waveform sonic log from a 1,000-foot deep stratigraphic test hole drilled by the Pennsylvania Geological Survey at the edge of a Marcellus Shale production well pad in Lycoming County, PA.

Tropical Storm Lee 24-hour precipitation map

Water samples using a CTD rosette were taken down to  4,600m in the Canadian Basin in order to investigate ocean acidification.  The water was analyzed shipboard for pH using a spectrophotometer.

USGS Hydrologist, Guy Foster collects a sample of blue-green algae in Milford Lake, Kansas.

Bald Eagle Lake near the Twin Cities, Minnesota. 

A breach in the coastline of Rodanthe, North Carolina, caused by Hurricane Irene in 2011.  Repeated storm impacts, combined with sea level rise, make the development and improvement of models that help forecast coastal change very important to planners working to build more resilient communities

Storm surge sensor installation prior to Hurricane Irene landfall

Water samples using a CTD rosette were taken down to  4,600m in the Canadian Basin in order to investigate ocean acidification.  The water was analyzed shipboard for pH using a spectrophotometer.

Water samples using a CTD rosette were taken down to  4,600m in the Canadian Basin in order to investigate ocean acidification.  Water samples were collected from each of the bottles and analyzed shipboard.

Water samples using a CTD rosette were taken down to  4,600m in the Canadian Basin in order to investigate ocean acidification.  The water was analyzed shipboard for pH using a spectrophotometer.

Water samples using a CTD rosette were taken down to  4,600m in the Canadian Basin in order to investigate ocean acidification.  The water was analyzed shipboard for pH using a spectrophotometer.

USGS employee Ben Beal conducts stream discharge and velocity measurements at USGS gage 10297010 Topaz Canal below Topaz Lake near Topaz, CA .

These are baydzherakhs that form when Pleistocene-aged ice wedges thaw and leave behind a mound of unfrozen soil that is easily susceptible to decomposition. This sediment has not thawed for at least 40,000 years.