Hi-RES - What do the electromagnetic data show?

Electromagnetic (EM) data provide information on:

  • high electrical conductivity in the near subsurface relating to leakage from land-fill sites, waste dumps, mine waste tips and industrial pollution
  • concealed geological structure
  • metalliferous mineral deposits
  • ground conductivity for earthing of masts and other electrical infrastructure.
EM data - helping to protect vulnerable aquifers

North Nottinghamshire: Trial surveys in the Nottinghamshire coalfield have revealed conductive plumes, within the Permo-Triassic aquifer, emanating from spoil zones. The illustration shows a conductive plume to the east of a working colliery. The model obtained from the airborne data has been confirmed by borehole investigations (coloured discs). The volume shown is 1.5 x 1 x 0.06 km.

EM data - geology, landfills and industrial activities

Langar, Nottinghamshire: Three views of a 4 x 1.5 km largely agricultural area, superimposed on topography. (a) aerial photo, (b) bedrock geology and (c) subsurface electrical conductivity. Conductivities vary with geology and clay content. Superimposed are localised variations due to works, farms and two landfills (L1 and L2).