TDEM in Groundwater Mapping — A Continuous Approach

The application of the transient electromagnetic method in hydrogeophysical surveys

“…The amplitude of both types of coupling responses is strongly dependent on the size and shape of the man-made conductor, and the distance, a, between the transmitter and the conductor (Sørensen et al, 2000). In general, man-made conductors can be of 3-D, 2-D, or elongated shape with ends, which we refer to as 2.5-D.…”

“…Sørensen et al (2000) differentiates between two types of coupling: galvanic and capacitive. The names refer to the return path of the current after being induced in a man-made conductor by the TEM transmitter.…”

Towed transient electromagnetic survey for groundwater investigation - challenges and solutions.

“…al., 2007, Noteboom et. al., 2007, from the ground using EM (Sørensen, et. al., 2000) or capacitive geo-electric equipment or from water using geoelectric or EM equipment (Allen, 2007, Barrett et.…”

“…Towed transient electromagnetic arrays have been applied by Sørensen, et al(2000), and the author (Allen, 2007) however the full potential of the technique is far from being realised.…”

A novel transient electromagnetic measuring system

“…For instance, ARTEMIS [10] (Array Receiver TEM Intelligent System), provided by Geo Instruments, adopts wireless synchronous links, in result that receivers can work in the same v (t) H noising background simultaneity. PATEM (Pulled Array Transient Electromagnetic Method) [11] and VETEM [12] , equiped on vehicle moving at about 2km / hour, and with small receiving and transmitting loops, represent high efficiency. *Email: fuzhihong@cqu.edu.cn This paper proposes a TEM system, discussing the system structure and the principles of high-power current steep pulse transmitter , GPS synchronous controller and TEM receiver.…”