Methane seeping on the Virginia margin just shallower than the limit for gas hydrate stability.
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Methane seeping
Methane seeping on the Virginia margin just shallower than the limit for gas hydrate stability.
Noxious Algal Bloom in an estuary along the Massachusetts coast
Noxious Algal Bloom in an estuary along the Massachusetts coast. Photo from the USGS circular 1360 "Water Quality in Pricipal Aquifers of the United States, 1991-2010."
Noxious Algal Bloom in an estuary along the Massachusetts coast. Photo from the USGS circular 1360 "Water Quality in Pricipal Aquifers of the United States, 1991-2010."
Simulation Model
Simulation results for geomorphic change in Suisun Bay, CA (Ganju and Schoellhamer, 2010)
Simulation results for geomorphic change in Suisun Bay, CA (Ganju and Schoellhamer, 2010)
Hydrate Molecule
Water molecules (1 red oxygen and 2 white hydrogens) form a pentagonal dodecahedron around a methane molecule (1 gray carbon and 4 green hydrogens). This represents 2 of the 8 parts of the typical Structure I gas hydrate molecule.
Water molecules (1 red oxygen and 2 white hydrogens) form a pentagonal dodecahedron around a methane molecule (1 gray carbon and 4 green hydrogens). This represents 2 of the 8 parts of the typical Structure I gas hydrate molecule.
Instrumented Pressure Testing Chamber (IPTC)
The Instrumented Pressure Testing Chamber (IPTC). A device for measuring the physical properties of naturally-occurring, hydrate-bearing sediment at nearly in situ pressure conditions
The Instrumented Pressure Testing Chamber (IPTC). A device for measuring the physical properties of naturally-occurring, hydrate-bearing sediment at nearly in situ pressure conditions
Groundwater measurement at Richmond well R-126 Long Island, NY
Groundwater measurement at Richmond well R-126 Long Island, NY
Groundwater measurement at Richmond well R-126 Long Island, NY
Cypress Bridge Preserve, October 2010
Scientists took a trip to Cypress Bridge Preserve during the "dry" season to collect sediment cores for further analysis.
Scientists took a trip to Cypress Bridge Preserve during the "dry" season to collect sediment cores for further analysis.
Tremper Kill, NY Flooding
Tremper Kill flooding 2010
R/V Rafael
The R/V Rafael performs nearshore geophysical surveys, and includes high resolution sub-bottom profiling, sidescan sonar, and multibeam echosounding in its arsenal of survey capabilities.
The R/V Rafael performs nearshore geophysical surveys, and includes high resolution sub-bottom profiling, sidescan sonar, and multibeam echosounding in its arsenal of survey capabilities.
Licking River at Highway 536 near Alexandria, Kentucky
Licking River at Highway 536 near Alexandria, Kentucky water-quality equipment install.
Licking River at Highway 536 near Alexandria, Kentucky water-quality equipment install.
USGS hydrologist collecting a water quality sample from a NY stream
USGS hydrologist Tia Scott collecting a water quality sample from an eastern New York stream
USGS hydrologist Tia Scott collecting a water quality sample from an eastern New York stream
Sandra Brosnahan (USGS) collecting water samples (Long Island, NY).
Sandra Brosnahan (USGS) collecting water samples (Long Island, NY).
Sandra Brosnahan (USGS) collecting water samples (Long Island, NY).
USGS scientists fluid-logging in Bangladesh
USGS scientists from the New York and Connecticut Water Science Centers fluid logging in Bangladesh
USGS scientists from the New York and Connecticut Water Science Centers fluid logging in Bangladesh
USGS conducting geophysical training in Iraq
USGS scientists from the New York and Connecticut Water Science Centers conduct geophysical training in Iraq
USGS scientists from the New York and Connecticut Water Science Centers conduct geophysical training in Iraq
Cypress Bridge Preserve, May 2010
Scientists took a trip to Cypress Bridge Preserve during the "wet" season to collect sediment cores for further analysis.
Scientists took a trip to Cypress Bridge Preserve during the "wet" season to collect sediment cores for further analysis.
Cypress Bridge Preserve, May 2010
Scientists took a trip to Cypress Bridge Preserve during the "wet" season to collect sediment cores for further analysis.
Scientists took a trip to Cypress Bridge Preserve during the "wet" season to collect sediment cores for further analysis.
Buck Creek Watershed
Stream Flow and Chemistry Monitoring Stations in Buck Creek Watershed, NY
Stream Flow and Chemistry Monitoring Stations in Buck Creek Watershed, NY
Examining Arctic lake sediment core
John Pohlman (USGS, left) and colleagues from the University of Alaska Fairbanks examine a sediment core retrieved through winter ice from the bottom of a lake in northern Alaska. Such cores are used to reconstruct methane emissions and climate history over the past 20,000 years.
John Pohlman (USGS, left) and colleagues from the University of Alaska Fairbanks examine a sediment core retrieved through winter ice from the bottom of a lake in northern Alaska. Such cores are used to reconstruct methane emissions and climate history over the past 20,000 years.
Flooded Streamgage
Flooding at the USGS Streamgage Nashua River at Pepperell, MA (01096500) on March 17, 2010 at about 12:15 EDT at a gage height of 14.58 ft and discharge of 9,780 cfs.
Flooding at the USGS Streamgage Nashua River at Pepperell, MA (01096500) on March 17, 2010 at about 12:15 EDT at a gage height of 14.58 ft and discharge of 9,780 cfs.
Low-head dam on the Tonawanda Creek at Batavia, 2010
Low-head dam on the Tonawanda Creek at Batavia, 2010
Low-head dam on the Tonawanda Creek at Batavia, 2010