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Quarterly Journal of Engineering Geology and Hydrogeology
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Quarterly Journal of Engineering Geology and Hydrogeology; 1983; v. 16; issue.1; p. 43-51;
DOI: 10.1144/GSL.QJEG.1983.016.01.04
© 1983 Geological Society of London

Article

Delineation of saline intrusion in the Dungeness shingle aquifer using surface geophysics

Akomeno Ulaya-Egbe Oteri

Department of Geology, University of Ilorin, PMB 1515, Ilorin, Nigeria

Salt water intrusion into a coastal water table (shingle) aquifer has occured in Dungeness, England. Chloride ion concentrations as high as 3000 mg/l have been measured. These compare with background values of 40 mg/l. 29 Vertical electrical resistivity soundings using the Wenner array were undertaken to determine the applicability of direct current resistivity as a method for delineating the saline intrusion. Interpretation of the resistivity data show not only a saline zone near the coast resulting from sea water intrusion, but also the presence of a low resistivity layer beneath fresh water bearing shingle throughout the study area. This low resistivity is interpreted as being mainly due to saline waterbearing sands.

A borehole drilled a year after the survey confirmed the presence of saline water beneath a fresh water lens.


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Discussion on ‘Delineation of saline intrusion in the Dungeness Shingle Aquifer’ by Okomeno Ulaya-Egbe Oteri
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Quarterly Journal of Engineering Geology and Hydrogeology 1984 17: 163. [Abstract]  



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