Images

Scientists are collecting core samples from the Great Dismal Swamp in Virginia to understand natural conditions before centuries of ditching, draining and harvesting. This is a collaborative project between the USGS and the Great Dismal Swamp National Wildlife Refuge.

Photograph of the Great Dismal Swamp in Virginia.

The USGS Nansemond research station, located adjacent to the Hampton Roads Sanitation District's SWIFT pilot site. The building contains the Nansemond extensometer.

This photograph shows the drilling site for the USGS Nansemond extensometer. The site is located adjacent to the Hampton Roads Sanitation District's SWIFT pilot site. The drilling would extend 1,960 feet below the ground surface.

This photograph shows the initial drilling for the borehole extensometer installed at the Nansemond, Virginia research site.

Scientists are collecting core samples from the Great Dismal Swamp in Virginia to understand natural conditions before centuries of ditching, draining and harvesting. This is a collaborative project between the USGS and the Great Dismal Swamp National Wildlife Refuge.

Scientists are collecting core samples from the Great Dismal Swamp in Virginia to understand natural conditions before centuries of ditching, draining and harvesting. This is a collaborative project between the USGS and the Great Dismal Swamp National Wildlife Refuge.

Scientists are collecting core samples from the Great Dismal Swamp in Virginia to understand natural conditions before centuries of ditching, draining and harvesting. This is a collaborative project between the USGS and the Great Dismal Swamp National Wildlife Refuge.

Scientists are collecting core samples from the Great Dismal Swamp in Virginia to understand natural conditions before centuries of ditching, draining and harvesting. This is a collaborative project between the USGS and the Great Dismal Swamp National Wildlife Refuge.

Scientists are collecting core samples from the Great Dismal Swamp in Virginia to understand natural conditions before centuries of ditching, draining and harvesting. This is a collaborative project between the USGS and the Great Dismal Swamp National Wildlife Refuge.

Photograph of the Great Dismal Swamp in Virginia.

Scientists are collecting core samples from the Great Dismal Swamp in Virginia to understand natural conditions before centuries of ditching, draining and harvesting. This is a collaborative project between the USGS and the Great Dismal Swamp National Wildlife Refuge.

Photograph of the Great Dismal Swamp in Virginia several years after the 2011 fire. USGS scientists recently collected peat and lake core samples from the swamp to help reconstruct natural environmental conditions over the past 12,000 years.

The USGS Nansemond pipe extensometer (59D 39) showing the triangular table in green and the instrument bridge in yellow above the extensometer. The piers that support the table extend down 65 feet. The movement of the table relative to the extensometer is how land-surface movement is measured.

A photo of the USGS Nansemond pipe extensometer (59D 39) with a total depth of 1,960 feet.

The USGS Nansemond research station.

An analog dial gage (left) and a digital linear potentiometer (right with blue barrel) used to measure land-surface movement in response to aquifer system deformation at the USGS Nansemond extensometer.

Pivot block where the USGS Nansemond extensometer connects to the fulcrum arm.

This extensometer is a part of the The Virginia Extensometer Network.

Installing the linear potentiometer on the USGS Nansemond extensometer. The linear potentiometer is used to measure land-surface movement in response to aquifer system deformation at the USGS Nansemond extensometer.

Functional and Molecular Bioassay Laboratory — Kearneysville, West Virginia. Multiwell cell culture array

Roanoke VA Precipitation Station Garden City Elementary School.