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Time Domain EM Soundings for the Delineation of the Fresh Water - Salt Water Interface in Eastern Canada IslandsNormal access

Authors: J. Giraud, M. Chouteau and A. Bouchedda
Event name: 76th EAGE Conference and Exhibition 2014
Session: EM Inversion
Publication date: 16 June 2014
DOI: 10.3997/2214-4609.20140726
Organisations: EAGE
Language: English
Info: Extended abstract, PDF ( 1.1Mb )
Price: € 20

Summary:
A hydrogeophysical study involving electromagnetic and electric methods to map depths to the saltwater-freshwater interface into coastal aquifers was carried out. Time domain electromagnetic (TDEM) soundings were acquired along electric resistivity tomography (ERT) profiles perpendicular to the coastline in the Magdalen Islands (Eastern Canada). Departures from hydrogeological models allowed evaluating the influence of water pumping on the studied aquifers. As a result, except in zones closer to the pumping wells, a good agreement between the hydrogeological model and the position of the interface estimated by the coupling of TDEM and ERT is observed.


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