Frequency Domain Shallow Electromagnetics (FDEM)

Frequency Domain Shallow Electromagnetics (FDEM) is a specialized geophysical method designed for investigating subsurface conductivity variations at relatively shallow depths. In FDEM, alternating current of varying frequencies is injected into the ground through a transmitter coil on the surface. The induced electromagnetic fields interact with the subsurface materials, and the resulting response is measured by receivers, providing valuable information about the electrical conductivity distribution.

One of the strengths of FDEM lies in its ability to offer detailed insights into the near-surface geological structures and their conductivity variations. This makes it particularly useful for environmental studies, groundwater exploration, and mapping sedimentary layers. FDEM excels in providing data at different frequencies, allowing for the characterization of both conductive and resistive subsurface features.

However, it’s important to consider certain limitations. The depth of investigation with FDEM is typically limited to tens of meters, and the accuracy of results can be influenced by factors such as the presence of metallic objects or highly conductive materials.

Choose Frequency Domain Shallow Electromagnetics when conducting subsurface investigations at shallow depths, especially in applications such as environmental assessments, hydrogeological studies, and geological mapping. FDEM serves as a valuable tool for professionals in geophysics, environmental science, and groundwater exploration.