On the classification of surface geoelectric arrays

Abstract

SUMMARYWe have found in the geophysical literature more than ninety different surface geoelectric arrays, fulfilling an updated definition (specifying the current feeding, the potential difference measurement and the geometry of the electrodes). Several composite configurations, with widely varying geometry, have also been collected. We have presented the geoelectric arrays in a systematic way and with a unified notation. The classification is based on three divalent parameters: "superposition" of measurements, "focusing" of currents and "colinearity" of the array, creating 8 groups of geoelectric arrays. For the simplest group (the group of nonfocused, nonsuperposed, colinear arrays) we cover all theoretically possible arrays. For the other groups -due to the infinite variety -we collected only the already existing arrays, but it is easy to create further example arrays. The proposed classification may facilitate a systematic comparison of properties of different arrays and inspire testing new arrays, to find optimal configurations for actual field problems. Finally, the classification certainly helps to avoid rediscovering already published arrays.

Parameter sensitivity maps of surface geoelectric arrays I. Linear arrays

“…In the geophysical literature there are altogether about one hundred geoelectric arrays (Szalai and Szarka 2008b). Each of them has specific features, but it is not easy to characterise all these arrays by using a few parameters.…”

“…In this and in our next, accompanying paper (Szalai and Szarka 2008a, discussing nonlinear and focused arrays) we present a complete list of parameter sensitivity maps of all those geoelectric arrays, which dispose at all parameter sensitivity maps. For this analysis the approximately one hundred arrays, collected by Szalai and Szarka (2008b) were taken into account. In this way, these two papers together characterise all surface geoelectric arrays from a special point of view.…”

Natural Water Treatment Systems for Safe and Sustainable Water Supply in the Indian Context: Saph Pani

“…Many workers like Dahlin and Zhow (2004), Saydam and Duckworth (1978), Szalai and Szarka (2008) and Zhou et al (2002) have clearly discussed the pro's and con's of various configurations. We need to accept and adopt a particular configuration depending on the need of the interest of the field objective.…”

The First Inversion Results with the g11n Configuration

“…Most of them however belong to groups III-VII (Fig. 1) following the classification of the arrays by Szalai et al (2008) that is they are the superposed or focussed arrays whose field application is rather difficult. Szalai et al (2002) introduced therefore geometrical null arrays where the appropriate positioning of the electrodes results in null array situation.…”