Symposium on the Application of Geophysics to Engineering and Environmental Problems 2002 2002
DOI: 10.4133/1.2927121
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Continuous Resistivity Profiling in Shallow Marine and Fresh Water Environments

Abstract: In this paper, we describe an instrument system for performing continuous resistivity profiling in shallow freshwater and marine environments. Using a streamer cable containing 9 electrodes, the system continuously samples the dipole-dipole resistivity at n-spacings 1 through 6. The system can be installed aboard a variety of small inboard or outboard powered vessels in a few hours. Hand-held or marine GPS units provide location information that is recorded by a laptop computer. With this system, up to 40 line… Show more

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Cited by 6 publications
(7 citation statements)
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“…Snyder et al () discussed technical issues involved in the design of a waterborne resistivity imaging system including the effect of water depth on measurements made with the floating dipole‐dipole electrode configuration. For cases where the sub‐bottom is 3 to 5 times more resistive than the water layer (typical of sands or silts saturated with the overlying water) they show that measured apparent resistivities will be at least 50% of the true sub‐bottom resistivity provided that the dipole length is at least twice the water depth.…”
Section: Recent Methodological Developments and Applicationsmentioning
confidence: 99%
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“…Snyder et al () discussed technical issues involved in the design of a waterborne resistivity imaging system including the effect of water depth on measurements made with the floating dipole‐dipole electrode configuration. For cases where the sub‐bottom is 3 to 5 times more resistive than the water layer (typical of sands or silts saturated with the overlying water) they show that measured apparent resistivities will be at least 50% of the true sub‐bottom resistivity provided that the dipole length is at least twice the water depth.…”
Section: Recent Methodological Developments and Applicationsmentioning
confidence: 99%
“…Sensitivity to changes in sub‐bottom resistivity increases with the transmitter‐receiver dipole offset or nspacing. Based on these 1D modelling results and signal‐to‐noise considerations, Snyder et al () designed a dipole‐dipole array having six 10 m potential dipoles (n = 6,a= 10 m) with the expectation that it would typically work effectively in water depths of up to 5–10 m.…”
Section: Recent Methodological Developments and Applicationsmentioning
confidence: 99%
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“…Therefore, electrical resistivity and geometry of the water column must be known for an accurate robust inversion [12,39,44,45]. The electrical resistivity and geometry of the water column is fixed in the earth model and the inversion program attempts to determine the electrical resistivity of the cells that would most accurately reproduce the observed electrical resistivity measurements [46].…”
Section: Methodsmentioning
confidence: 99%