E4D ERT

Electrical Resistivity Tomography (ERT)

Characterization • Time-lapse imaging • Laboratory tank-scale imaging

ERT is a proven geophysical method for remotely imaging the subsurface, but until the advent of E4D, its widespread use for interpreting large, high-frequency datasets using physically-based incorporation of known information was limited.

1. Characterization

ERT depth slices at the Hanford Site in Washington at the BC Cribs. High conductivity is indicative of contaminated regions.
 

Bulk conductivity distribution beneath Volcano Island, Southern Italy.
 
2. Time-lapse imaging

Along the Columbia River in the Hanford Site 300 Area capturing river stage and the locations of paleochannels.

 


Polyphosphate injection at the Hanford Site 300 Area.
 
3. Laboratory tank-scale imaging

Feasibility assessment of the capability to image root zone electrical properties using a vertical mini-electrode array: (left) true root distribution that includes a series of roots of approximately 2 mm in diameter; (right) corresponding 3D tomographic imaging results.