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Trends in waterborne electrical and EM induction methods for high resolution sub‐bottom imaging
Author(s) -
Butler Karl E.
Publication year - 2009
Publication title -
near surface geophysics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.639
H-Index - 39
eISSN - 1873-0604
pISSN - 1569-4445
DOI - 10.3997/1873-0604.2009002
Subject(s) - electrical resistivity tomography , geology , environmental geology , economic geology , hydrogeology , groundwater , engineering geology , geobiology , electrical resistivity and conductivity , regional geology , palaeogeography , geophysics , igneous petrology , telmatology , geotechnical engineering , volcanism , tectonics , seismology , engineering , electrical engineering
Shallow water applications of electrical and electromagnetic geophysical methods have grown in recent years with recognition of the information these methods can provide regarding groundwater‐surface water interaction, geotechnical engineering, exploration, marine geology and other fields. In many applications, spatial variations in resistivity are useful as a proxy for variations in another bulk material property such as pore water salinity, clay content, porosity, or temperature. Applications of galvanic resistivity methods have been buoyed by the development of marine configurations that are now commercially available. In contrast, with two notable exceptions, most applications of EM induction methods have involved experimental adaptations of instruments originally designed for use on land. Methods for shallow water resistivity and EM induction surveys are at an exciting stage of development where several promising applications have been demonstrated but the suite of tools and components commercially available and widely tested remains relatively small.