Electrical resistivity tomography (ERT) is a geophysical tool used to obtain an image of the subsurface using electrical measurements made at the surface. The ERT technique provides an image of the electrical properties of the sub-surface in a cross-sectional format. ERT data are collected using a linear array of electrodes connected to a resistivity transmitter/receiver and an electrode control box. Various electrode spacings and arrangements can be used, depending upon the objective of the survey and local geology.

Doing ERT Surveys

An EM survey is generally completed first in order to locate regions for optimal ERT line placement. ERT lines are then setup by placing a number of equidistant electrodes and then introducing a current. The resulting voltages are measured and converted to resistivity values for processing and plotting.

Vertical Delineation

Data obtained from an ERT line allows us to focus on a vertical cross-section of the subsurface. Specialized interpretation of the data then defines the vertical extent of inorganic contamination. Combining EM and ERT data provides an estimate for the volume of contamination at a site.

Groundwater Investigation

ERT surveys are highly useful for locating groundwater resources such as potable groundwater to depths of 50m or more. Extent of groundwater contamination can be determined by ERT beyond the limits of an EM survey.

Geological Mapping

Routine applications of ERT surveys include mapping soil/bedrock interfaces, vertical fractures zones, sand channels, sink holes and void zones.



© 2014 AKS Geoscience Inc.
Electrical resistivity tomography (ERT) is a geophysical tool used to obtain an image of the subsurface using electrical measurements made at the surface. The ERT technique provides an image of the electrical properties of the sub-surface in a cross-sectional format.
ERT data are collected using a linear array of electrodes connected to a resistivity transmitter/receiver and an electrode control box. Various electrode spacings and arrangements can be used, depending upon the objective of the survey and local geology.

Doing ERT Surveys

An EM survey is generally completed first in order to locate regions for optimal ERT line placement.

ERT lines are then setup by placing a number of equidistant electrodes and then introducing a current.

The resulting voltages are measured and converted to resistivity values for processing and plotting.

Vertical Delineation

Data obtained from an ERT line allows us to focus on a vertical cross-section of the subsurface.

Specialized interpretation of the data then defines the vertical extent of inorganic contamination.

Combining EM and ERT data provides an estimate for the volume of contamination at a site.

Groundwater Investigation

ERT surveys are highly useful for locating groundwater resources such as potable groundwater to depths of 50m or more.

Extent of groundwater contamination can be determined by ERT beyond the limits of an EM survey.

Geological Mapping

Routine applications of ERT surveys include mapping soil/bedrock interfaces, vertical fractures zones, sand channels, sink holes and void zones.



© 2014 AKS Geoscience Inc.

Electrical resistivity tomography (ERT) is a geophysical tool used to obtain an image of the subsurface using electrical measurements made at the surface. The ERT technique provides an image of the electrical properties of the sub-surface in a cross-sectional format.

ERT data are collected using a linear array of electrodes connected to a resistivity transmitter/receiver and an electrode control box. Various electrode spacings and arrangements can be used, depending upon the objective of the survey and local geology.

Doing ERT Surveys

An EM survey is generally completed first in order to locate regions for optimal ERT line placement. ERT lines are then setup by placing a number of equidistant electrodes and then introducing a current. The resulting voltages are measured and converted to resistivity values for processing and plotting.

Vertical Delineation

Data obtained from an ERT line allows us to focus on a vertical cross-section of the subsurface. Specialized interpretation of the data then defines the vertical extent of inorganic contamination. Combining EM and ERT data provides an estimate for the volume of contamination at a site.

Groundwater Investigation

ERT surveys are highly useful for locating groundwater resources such as potable groundwater to depths of 50m or more. Extent of groundwater contamination can be determined by ERT beyond the limits of an EM survey.

Geological Mapping

Routine applications of ERT surveys include mapping soil/bedrock interfaces, vertical fractures zones, sand channels, sink holes and void zones.

© 2014 AKS Geoscience Inc.