DC-resistivity mapping of internal landfill structures: two pre-excavation surveys |
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Authors: | C Bernstone T Dahlin T Ohlsson H Hogland |
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Institution: | (1) Department of Geotechnology, Lund University, Box 118, S-221 00 Lund, Sweden, e-mail: TG@.TG.LTH.SE, SE;(2) NSR Development, S-251 98 Helsingborg, Sweden, SE;(3) Department of Water Resources Engineering, Lund University, Sweden, SE |
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Abstract: | Geophysical investigations using 2-D DC resistivity were carried out on old parts of two similar landfills, with waste of
different ages. The data sets, which included high data density in both vertical and horizontal directions, were interpreted
with 2-D smoothness constrained inversion. The landfills were excavated after the surveying. The objective was to test the
capability of the resistivity method as a pre-characterization technique. The objectives were only partially fulfilled. First,
the moisture content was the parameter that appeared to exert the dominant control over the resistivity distribution of the
landfill. The most important potential information that can be recovered is, therefore, an indication of the waste piles hydraulics.
Second, it was neither possible to estimate the amount of recoverable soils, nor to correlate the type of waste with the resistivity
models. However, discrete anomalies were identified, and if specific materials are searched for, the resistivity models indicate
possible places to search.
Received: 23 July 1998 · Accepted: 20 October 1998 |
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Keywords: | Environmental geophysics Resistivity Inversion Landfill mining Waste Characterization |
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