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Imaging of subsurface contaminations using dipole EM systems
Author(s) -
Sharma S. P.,
Verma S. K.
Publication year - 1994
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/93gl03423
Subject(s) - resistive touchscreen , dipole , perpendicular , electrical conductor , computer science , geology , layer (electronics) , orientation (vector space) , image resolution , interference (communication) , environmental science , remote sensing , materials science , physics , telecommunications , artificial intelligence , geometry , computer vision , mathematics , quantum mechanics , composite material , channel (broadcasting)
Major contemporary applications of the dipole EM methods deal with the problems of imaging subsurface contaminated or polluted zones, mapping of saline‐water incursion zones in coastal areas, foundation engineering and waste disposal etc. Because such problems are mostly encountered in populated and/or industrialized areas, inductive electromagnetic (EM) methods employing small dipolar transmit‐receive (T‐R) systems provide efficient tools to tackle them. A number of T‐R orientations, measuring different primary and resultant fields, are currently employed in EM exploration. In most of the above problems the target zone can be simulated by a thin conductive or resistive layer. The present work quantifies the resolving capabilities of various dipole EM systems for such a target layer. The target layer is considered embedded in different types of commonly occuring geoelectrical situations. Comparative study of the resolutions obtained for the target layer by different dipole systems reveals that the perpendicular loop system provides the best resolution due to its unique advantage of being free from primary field interference.