About EM surveys

About EM surveys

Electromagnetic methods (FDEM, TDEM) were developed for the purpose of measuring resistivity in the subsurface. The methods are used extensively around the world to provide solutions to engineering and environmental problems. These methods, which enable penetration to relatively great depths (up to hundreds of meters), allow to carry out deep measurements at a very high level of accuracy. In Israel, electromagnetic methods are mainly used for monitoring changes in groundwater salinity and for locating metals objects. The electromagnetic equipment used is mobile and easy to operate, and the measurements can be relatively quickly analyzed and interpreted. 

Applications 

 Hydrology
 detection of seawater intrusion into coastal aquifer 

 Infrastructure
 locating metal objects, pipes and buried utilities 

 Agriculture
 mapping the electrical resistivity and the salinity of soils for the purpose of optimizing fertilization and improving crops 

 Archeology
 locating subsurface cavities, underground structures; mapping the boundaries of archeological sites 

 Environment
 locating leaks from waste disposal sites and water reservoirs 

 Geology
 mapping of shallow subsurface geological structures and detection of subsurface metallic minerals deposits