This photograph shows the initial drilling for the borehole extensometer installed at the Nansemond, Virginia research site.
The USGS Nansemond Extensometer
Detailed Description
The USGS Nansemond pipe extensometer (59D 39) with a total depth of 1,960 feet. Data for this site can be found on USGS Water Data for the Nation.
This extensometer is a part of the Virginia Extensometer Network.
Sources/Usage
Public Domain.
Related
The Virginia Extensometer Network
Borehole extensometers are instruments that monitor land subsidence caused by aquifer compaction. They provide precise, high-resolution measurements of changes in aquifer-system thickness. These changes in aquifer-system thickness contribute to vertical land motion (VLM) across the Virginia Coastal Plain, and are driven primarily by groundwater level decline due to human water usage. The Virginia...
Land Subsidence on the Virginia Coastal Plain
Land subsidence is a loss of ground elevation, often experienced as the ground slowly sinking over the course of years. In eastern Virginia, high rates of groundwater use is a major factor in the land subsidence affecting the area. The Virginia-West Virginia Water Science Center, with the help of our partners, has been monitoring land subsidence in the Virginia Coastal Plain since 1979 using a...
Check out more images of our Nansemond research site below:
USGS Extensometer Drilling in Virginia
Along the Atlantic Coast, a 2000+ ft deep hole has been drilled by the USGS to assess the issues of groundwater pumping, relative sea-level rise, and land subsidence. This video shows the drilling of the first extensometer to measure land subsidence in the North Atlantic Coastal Plain in 30+ years.
Virginia Extensometer Drilling Site
This photograph shows the initial drilling for the borehole extensometer installed at the Nansemond, Virginia research site.
USGS Nansemond drilling site.
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 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.
The USGS Nansemond research station.
The USGS Nansemond research station, located adjacent to the Hampton Roads Sanitation District's SWIFT pilot site. The building contains the Nansemond extensometer.
The USGS Nansemond research station, located adjacent to the Hampton Roads Sanitation District's SWIFT pilot site. The building contains the Nansemond extensometer.
The USGS Nansemond pipe extensometer.
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.
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.
The USGS Nansemond pipe extensometer.
The USGS Nansemond pipe extensometer (59D 39) with a total depth of 1,960 feet.
The USGS Nansemond pipe extensometer (59D 39) with a total depth of 1,960 feet.
The USGS Nansemond research station
The USGS Nansemond research station.
The USGS Nansemond research station.
Analog dial gage (left) and a digital linear potentiometer (right)
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.
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.
USGS Nansemond extensometer Pivot Block.
Pivot block where the USGS Nansemond extensometer connects to the fulcrum arm.
This extensometer is a part of the The Virginia Extensometer Network.
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
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.
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.
Related
The Virginia Extensometer Network
Borehole extensometers are instruments that monitor land subsidence caused by aquifer compaction. They provide precise, high-resolution measurements of changes in aquifer-system thickness. These changes in aquifer-system thickness contribute to vertical land motion (VLM) across the Virginia Coastal Plain, and are driven primarily by groundwater level decline due to human water usage. The Virginia...
Land Subsidence on the Virginia Coastal Plain
Land subsidence is a loss of ground elevation, often experienced as the ground slowly sinking over the course of years. In eastern Virginia, high rates of groundwater use is a major factor in the land subsidence affecting the area. The Virginia-West Virginia Water Science Center, with the help of our partners, has been monitoring land subsidence in the Virginia Coastal Plain since 1979 using a...
Check out more images of our Nansemond research site below:
USGS Extensometer Drilling in Virginia
Along the Atlantic Coast, a 2000+ ft deep hole has been drilled by the USGS to assess the issues of groundwater pumping, relative sea-level rise, and land subsidence. This video shows the drilling of the first extensometer to measure land subsidence in the North Atlantic Coastal Plain in 30+ years.
Virginia Extensometer Drilling Site
This photograph shows the initial drilling for the borehole extensometer installed at the Nansemond, Virginia research site.
This photograph shows the initial drilling for the borehole extensometer installed at the Nansemond, Virginia research site.
USGS Nansemond drilling site.
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 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.
The USGS Nansemond research station.
The USGS Nansemond research station, located adjacent to the Hampton Roads Sanitation District's SWIFT pilot site. The building contains the Nansemond extensometer.
The USGS Nansemond research station, located adjacent to the Hampton Roads Sanitation District's SWIFT pilot site. The building contains the Nansemond extensometer.
The USGS Nansemond pipe extensometer.
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.
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.
The USGS Nansemond pipe extensometer.
The USGS Nansemond pipe extensometer (59D 39) with a total depth of 1,960 feet.
The USGS Nansemond pipe extensometer (59D 39) with a total depth of 1,960 feet.
The USGS Nansemond research station
The USGS Nansemond research station.
The USGS Nansemond research station.
Analog dial gage (left) and a digital linear potentiometer (right)
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.
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.
USGS Nansemond extensometer Pivot Block.
Pivot block where the USGS Nansemond extensometer connects to the fulcrum arm.
This extensometer is a part of the The Virginia Extensometer Network.
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
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.
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.