Images

Sausal Creek in central Oakland, California, is an urban creek that has been extensively modified for flood control. The USGS Regional Stream Quality Assessment assessed the water quality and ecological integrity of small streams like Sausal Creek in five major regions of the country.

As part of the Regional Stream Quality Assessments (RSQA), hydrologists, ecologists, and technicians did ecological surveys of aquatic biota and stream habitat.  Here, a geolomorphologist assesses stream banks.

A helicopter towing a large, cylindrical sensor will make low-level flights over parts of Cedar Rapids, Iowa, as part of a groundwater survey in May 2017.

Research Hydrologist Neil Terry (USGS) collects ground-penetrating radar (GPR) data. Using hydrogeophysical tools such as GPR enables scientists to collect images of the structure and conditions of the ice below them. (April 2017)

A helicopter towing a large, cylindrical sensor will make low-level flights over parts of Cedar Rapids, Iowa, as part of a groundwater survey in May 2017.

The Colorado River in Grand Canyon taken from Grand Canyon Village, Arizona. 

A helicopter towing a large, cylindrical sensor will make low-level flights over parts of Cedar Rapids, Iowa, as part of a groundwater survey in May 2017.

USGS employee Aaron Walsh performing wire weight measurement in record flood at gage 7018500 Big River at Byrnesville, MO

Shenandoah mobile laboratory fathead minnow experiment station

A helicopter towing a large, cylindrical sensor will make low-level flights over parts of Cedar Rapids, Iowa, as part of a groundwater survey in May 2017.

USGS hydrologic technician measures floodwaters along Flat Creek near Jenkins, Missouri using an Acoustic Doppler Current Profiling instrument. 

USGS hydrologic technician Christopher Rowden verifies the accuracy of streamgage information at the Jacks Fork River at Eminence, Missouri.

Research Hydrologist Neil Terry (USGS) collects ground-penetrating radar (GPR) data along an oil pipeline in Alaska. (April 2017)

USGS scientists are working alongside University researchers in Alaska to understand how groundwater and permafrost conditions change over time due to seasonal variations and climate change. View down the oil pipeline through one April 2017 study area. (April 2017)

Research Hydrologist Martin Briggs (USGS) tows ground-penetrating radar (GPR) during field work in Alaska. (April 2017)

Helicopters are often used to carry scientists and equipment to remote study areas in Alaska. In this photo, a ground-penetrating radar (GPR) unit is securely strapped to the side of the helicopter. (April 2017)

Research Hydrologist Martin Briggs (USGS) collects ground-penetrating radar (GPR) data. He is wearing special ice cleats on his shoes to have better traction walking on the ice. (April 2017)

USGS Research Geophysicist Andy Kass (left, in orange) adjusts surface nuclear magnetic resonance equipment (NMR) with input from collaborators Eliot Grunewald (Vista Clara), Alex Huryn (University of Alabama), and Patrick Hendrickson (University of Colorado). NMR is being used to measure the distribution of liquid water in the subsurface. (April 2017)

Borehole logging

Phenolic mount used to deploy an RDI ChannelMaster 600kHz ADVM.  Mount is resistant to corrosion and is articulated to allow adjustment of heading, pitch, and roll.

Phenolic mount used to deploy an RDI ChannelMaster 600kHz ADVM.  Mount is resistant to corrosion and is articulated to allow adjustment of heading, pitch, and roll.