Title :
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
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;
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
DOI :
10.1109/IGARSS.1995.519639
