The joint use of transient electromagnetic and vertical electric sounding in groundwater prospecting

TEM and VES were applied to groundwater prospecting at a site near Syktyvkar city (Komi Republic, Russia). We used multisequential TEM and VES inversion scheme, that allowed to improve the recovery of layered earth parameters. A relationship between the resistivity-thickness product (T) and the water conductivity km was evaluated, that could be used to estimate km based on electric and electromagnetic data in a similar geological situation. As a result of km estimation along the profile, an interval was defined, where water wells were most productive.