The topographic effect in Earth resistivity arrays: a comparative study

Author

Tsourlos, P.I. ; Szymanski, J.E. ; Dittmer, J.K.

Author_Institution

Dept. of Electron., York Univ., UK

Volume

1

fYear

34881

fDate

10-14 Jul1995

Firstpage

30

Abstract

A study of the effect of surface topographic variations on several DC Earth resistivity arrays is presented. A modified 2.5-D finite element method (FEM) modelling scheme was used to examine the performance of several survey arrays (dipole-dipole, Wenner, pole-pole, pole-dipole and Square) on buried features below a range of different topographical terrain contexts, such as valleys, hills and steep slopes. In general, the results indicate that, for resistivity profile applications, “local” four-electrode arrays are less sensitive to terrain topography variations than arrays that use remote probes

Keywords

geophysical techniques; terrestrial electricity; 2.5-D finite element method; DC method; Earth resistivity array; Square array; Wenner array; buried feature; buried object detection; dipole-dipole array; electrode array; four-electrode array; geoelectric; geology; geophysical measurement technique; numerical model; pole-dipole array; pole-pole array; resistivity profiling; resistivity sounding method; surface topography variation; terrestrial electricity; topographic effect; Conductivity; Context modeling; Current distribution; Differential equations; Earth; Finite element methods; Probes; Surface topography; Surface treatment; Testing;

fLanguage

English

Publisher

ieee

Conference_Titel

Geoscience and Remote Sensing Symposium, 1995. IGARSS '95. 'Quantitative Remote Sensing for Science and Applications', International

Conference_Location

Firenze

Print_ISBN

0-7803-2567-2

Type

conf

DOI

10.1109/IGARSS.1995.519639

Filename

519639