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Researchers walk between hundreds of spawning sockeye salmon in shallow lake at Izembek National Wildlife Refuge, Alaska Spawning sockeye salmon in Izembek National Wildlife Refuge, Alaska
Spawning sockeye salmon in Izembek National Wildlife Refuge, Alaska
Spawning sockeye salmon in Izembek National Wildlife Refuge, Alaska

USGS Upper Midwest Water Science Center hydrologist Laura Hubbard navigates between hundreds of spawning sockeye salmon as she filters water to detect avian influenza virus at Izembek National Wildlife Refuge, Alaska.

USGS Upper Midwest Water Science Center hydrologist Laura Hubbard navigates between hundreds of spawning sockeye salmon as she filters water to detect avian influenza virus at Izembek National Wildlife Refuge, Alaska.

Helicopter towing large hoop over snow covered ground, technician for scale Southern Wisconsin Airborne Electromagnetic Survey 2022
Southern Wisconsin Airborne Electromagnetic Survey 2022
Southern Wisconsin Airborne Electromagnetic Survey 2022

Low-flying helicopter with geophysical equipment loop deployed below it via slingload. In March 2022, a helicopter carried an airborne electromagnetic induction sensor over parts of southeast and southwest Wisconsin as part of a USGS study to map the aquifers in the region.

Low-flying helicopter with geophysical equipment loop deployed below it via slingload. In March 2022, a helicopter carried an airborne electromagnetic induction sensor over parts of southeast and southwest Wisconsin as part of a USGS study to map the aquifers in the region.

Geophysical survey hoop resting on snowy ground Northeast Wisconsin Airborne Electromagnetic Survey 2021 - Panoramic view of equipment on ground
Northeast Wisconsin Airborne Electromagnetic Survey 2021 - Panoramic view of equipment on ground
Northeast Wisconsin Airborne Electromagnetic Survey 2021 - Panoramic view of equipment on ground

Geophysical equipment loop for electromagnetic survey on ground prior to liftoff by helicopter. In January 2021 a helicopter carried an airborne electromagnetic induction sensor over parts of northeastern Wisconsin as part of a USGS study to map the aquifers in the region.

Geophysical equipment loop for electromagnetic survey on ground prior to liftoff by helicopter. In January 2021 a helicopter carried an airborne electromagnetic induction sensor over parts of northeastern Wisconsin as part of a USGS study to map the aquifers in the region.

Monitoring Stormwater and Green Infrastructure (Gary City Hall, Ind.)
Monitoring Stormwater and Green Infrastructure (Gary City Hall, Ind.)
Monitoring Stormwater and Green Infrastructure (Gary City Hall, Ind.)

This time-lapse video shows the construction of the new Gary City Hall parking lot and rain garden in Gary, Indiana. The City of Gary is utilizing green infrastructure in their redevelopment projects in the hopes of reducing the amount stormwater runoff that enters their storm-sewer system and, eventually, Lake Michigan.

This time-lapse video shows the construction of the new Gary City Hall parking lot and rain garden in Gary, Indiana. The City of Gary is utilizing green infrastructure in their redevelopment projects in the hopes of reducing the amount stormwater runoff that enters their storm-sewer system and, eventually, Lake Michigan.

Edge-of-Field Monitoring Using Depth-Integrated Sample Arm (DISA)
Edge-of-Field Monitoring Using Depth-Integrated Sample Arm (DISA)
Edge-of-Field Monitoring Using Depth-Integrated Sample Arm (DISA)

During edge-of-field monitoring of an agricultural field runoff event, a depth-integrated sample arm (DISA) is used to take a water sample at the same time a traditional water sample is taken from an intake located at the bottom of the H-flume exit, where the water is assumed to be completely mixed.

During edge-of-field monitoring of an agricultural field runoff event, a depth-integrated sample arm (DISA) is used to take a water sample at the same time a traditional water sample is taken from an intake located at the bottom of the H-flume exit, where the water is assumed to be completely mixed.

Dave Krabbenhoft discusses his career of mercury research
Dave Krabbenhoft discusses his career of mercury research
Dave Krabbenhoft discusses his career of mercury research

Dave Krabbenhoft discusses the history of his 28-year career at the USGS.

Working Aboard the U.S. EPA's Lake Guardian Sampling for Mercury
Working Aboard the U.S. EPA's Lake Guardian Sampling for Mercury
Working Aboard the U.S. EPA's Lake Guardian Sampling for Mercury

Dave Krabbenhoft discusses working on the U.S. EPA's Lake Guardian, and the perspective he and his team have by being on board and viewing the less developed parts of the shoreline from the middle of the lake.

Dave Krabbenhoft discusses working on the U.S. EPA's Lake Guardian, and the perspective he and his team have by being on board and viewing the less developed parts of the shoreline from the middle of the lake.

Time-Lapse of Edge-of-Field Event Near Fort Wayne, IN
Time-Lapse of Edge-of-Field Event Near Fort Wayne, IN
Time-Lapse of Edge-of-Field Event Near Fort Wayne, IN

Time-lapse photo of a rainfall-induced runoff event at an edge-of-field surface site near Fort Wayne, Indiana, on May 10-11, 2016. Edge-of-field monitoring is used to assess the quantity and quality of agricultural runoff and evaluate the effectiveness of conservation practices that aim to reduce nutrient loss.

Time-lapse photo of a rainfall-induced runoff event at an edge-of-field surface site near Fort Wayne, Indiana, on May 10-11, 2016. Edge-of-field monitoring is used to assess the quantity and quality of agricultural runoff and evaluate the effectiveness of conservation practices that aim to reduce nutrient loss.

Water-Level Fluctuations at Sheboygan River Mouth, Sheboygan, WI
Water-Level Fluctuations at Sheboygan River Mouth, Sheboygan, WI
Water-Level Fluctuations at Sheboygan River Mouth, Sheboygan, WI

A series of time-lapse photographs capture rapid water-level fluctuations in the vicinity of Wildwood Islands in the Sheboygan River, 4.4 km upstream of Lake Michigan near Sheboygan, Wis. The fluctuations are caused the interaction of seiche-related oscillations from Lake Michigan with river flows. 
 

A series of time-lapse photographs capture rapid water-level fluctuations in the vicinity of Wildwood Islands in the Sheboygan River, 4.4 km upstream of Lake Michigan near Sheboygan, Wis. The fluctuations are caused the interaction of seiche-related oscillations from Lake Michigan with river flows. 
 

Water-Level Fluctuations at Sheboygan River Mouth, Sheboygan, WI
Water-Level Fluctuations at Sheboygan River Mouth, Sheboygan, WI
Water-Level Fluctuations at Sheboygan River Mouth, Sheboygan, WI

A series of time-lapse photographs capture rapid water-level fluctuations in the vicinity of Wildwood Islands in the Sheboygan River, 4.4 km upstream of Lake Michigan near Sheboygan, Wis. The fluctuations are caused the interaction of seiche-related oscillations from Lake Michigan with river flows. 
 

A series of time-lapse photographs capture rapid water-level fluctuations in the vicinity of Wildwood Islands in the Sheboygan River, 4.4 km upstream of Lake Michigan near Sheboygan, Wis. The fluctuations are caused the interaction of seiche-related oscillations from Lake Michigan with river flows. 
 

Water-Level Fluctuations at Sheboygan River Mouth, Sheboygan, WI
Water-Level Fluctuations at Sheboygan River Mouth, Sheboygan, WI
Water-Level Fluctuations at Sheboygan River Mouth, Sheboygan, WI

A series of time-lapse photographs capture rapid water-level fluctuations in the vicinity of Wildwood Islands in the Sheboygan River, 4.4 km upstream of Lake Michigan near Sheboygan, Wis. The fluctuations are caused the interaction of seiche-related oscillations from Lake Michigan with river flows. 
 

A series of time-lapse photographs capture rapid water-level fluctuations in the vicinity of Wildwood Islands in the Sheboygan River, 4.4 km upstream of Lake Michigan near Sheboygan, Wis. The fluctuations are caused the interaction of seiche-related oscillations from Lake Michigan with river flows.