Geoelectric modelling with separation between electromagnetic and induced polarization field components

Improved imaging of a karst aquifer using focused source electromagnetic and differentially normalized method: a qualitative analysis

“…; Ivanov ; Veeken et al . ,b; Davydycheva and Rykhlinski ; Legeydo et al . ; Ageenkov, Davydenko and Fomitski ; Davydycheva et al .…”

“…The current is introduced into the ground via the currents electrodes AB and the receivers register the electric potential between electrode points OM and ON. There are receivers' offsets: I, II, III (after Veeken et al 2009b).…”

“…Despite of that, the normalized signal has less noisy, and little effects of distortions. Legeydo et al (1996) and Veeken et al (2009b) define these curves as fundamental parameters of the DNME, where indicates the quantity measured in the field. The zero suffix specifies the measure of the potential that is made at the turnon instant of the current.…”

“…Davydycheva and Rykhlinski () explain some differences and similarities between the approach of Veeken et al . (, b) about the DNME, and the FSEM presented by Davydycheva, Rykhlinski and Legeido (). In the present study, our aim was to design the field operations and to evaluate the contribution these techniques offer to solve the groundwater exploration problem.…”

“…Among the main problems faced by electrical and electromagnetic methods in groundwater exploration are those represented by the current flow dispersion, cultural noise, shallow lateral heterogeneities and difficulty to reach larger depths due to the rapid signal decay; so that the reliability of the model found is often ambiguous, since different models are able to provide the same theoretical response as can be seen in Veeken et al . (, b).…”