Geophysical surveying: Difference between revisions
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<center>'''Map of geophysical survey linesMap of the Eddleston site<br>showing the geophysical 'survey lines'.'''</center> | <center>'''Map of geophysical survey linesMap of the Eddleston site<br>showing the geophysical 'survey lines'.'''</center> | ||
This combination of electrical and electromagnetic (EM) techniques is a common application in investigations of shallow Quaternary deposits, and has been used successfully in a variety of recent BGS projects. | |||
[[Image:Ed_groundcond_big.jpg|frameless|center|500px|]] | |||
<center>'''An example of a ground conductivity map.'''</center> | |||
The geophysical results were used to develop the 3D geological model and to help decide where to site the floodplain boreholes. | The geophysical results were used to develop the 3D geological model and to help decide where to site the floodplain boreholes. | ||
Revision as of 11:38, 22 May 2026
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Geophysical surveying
Three different types of near-surface geophysical surveys were carried out at the Eddleston site to help explore the shallow geology of the site.
The techniques used were:
- electromagnetic induction (EM, also referred to as ground conductivity mapping)
- 2D electrical resistivity tomography (ERT) and
- ground penetrating radar (GPR)
showing the geophysical 'survey lines'.
This combination of electrical and electromagnetic (EM) techniques is a common application in investigations of shallow Quaternary deposits, and has been used successfully in a variety of recent BGS projects.
The geophysical results were used to develop the 3D geological model and to help decide where to site the floodplain boreholes.
Cross sections
The image below is an example of an ERT (electrical resistivity tomography) geophysical cross section across the floodplain/valley floor and the adjacent hill slope.
ERT example Example of an ERT (electrical resistivity tomography) geophysical cross section across the floodplain/valley floor and the adjacent hill slope.
Contact
Contact BGS Enquiries for further information.