Abstract
We applied the Time Domain Electro-Magnetic method (TDEM) in site assessment for civil engineering projects, especially tunnel construction. While TDEM method had been used for natural resource exploration thousand of meters below the ground, we appleid this method to accurately resolve the subsurface geoelectric structure between 10 meters and 200 meters below the ground surface. Rock resistivity is related to lithology and hydrogeology, and TDEM resistivity sounding is a valuable geological mapping tool. We will describe the technical report of this method.
