http://earthwise.bgs.ac.uk/index.php?action=history&feed=atom&title=Geophysical_surveyingGeophysical surveying - Revision history2026-04-18T20:47:41ZRevision history for this page on the wikiMediaWiki 1.42.3http://earthwise.bgs.ac.uk/index.php?title=Geophysical_surveying&diff=60119&oldid=prevDbk: Created page with "{{underconstruction}} ==Geophysical surveying== Map of geophysical survey linesMap of the Eddleston site showing the geophysical 'survey lines' 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..."2026-04-10T14:07:39Z<p>Created page with "{{underconstruction}} ==Geophysical surveying== Map of geophysical survey linesMap of the Eddleston site showing the geophysical 'survey lines' 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..."</p>
<p><b>New page</b></p><div>{{underconstruction}}<br />
==Geophysical surveying==<br />
Map of geophysical survey linesMap of the Eddleston site showing the geophysical 'survey lines'<br />
Three different types of near-surface geophysical surveys were carried out at the Eddleston site to help explore the shallow geology of the site.<br />
<br />
The techniques used were:<br />
<br />
* electromagnetic induction (EM, also referred to as ground conductivity mapping)<br />
* 2D electrical resistivity tomography (ERT) and<br />
* ground penetrating radar (GPR)<br />
<br />
An example ground conductivity map for the Eddleston site<br />
An example of a ground conductivity map<br />
<br />
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.<br />
<br />
The geophysical results were used to develop the 3D geological model and to help decide where to site the floodplain boreholes.<br />
<br />
===Cross sections===<br />
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.<br />
<br />
ERT example Example of an ERT (electrical resistivity tomography) geophysical cross section across the floodplain/valley floor and the adjacent hill slope.<br />
<br />
==Contact==<br />
Contact BGS Enquiries for further information.<br />
[[category:Eddleston ]]</div>Dbk