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The use of gravity methods in the internal characterization of landfills—a case study

František Mantlík1,3, Manuel Matias2, Jose Lourenço4, Carlos Grangeia2 and Hélder Tareco2

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Some examples of the use of gravity exploration methods in landfills were published recently. However, density contrast between the landfill and the host media as well as the cost involved may be limiting factors to the application of gravimetry to this problem. Herein a case study of the application of gravity methods to the internal characterization of a sealed landfill is presented. This landfill is installed in recent low-density quaternary sand formations. Two north–south gravity profiles were carried out. The first profile crossed the landfill at its centre, whilst a second profile was done some distance away from the landfill to provide general regional information. The first profile was modelled in order to obtain lateral variations of density within the landfill that might be caused by different types of waste and/or the age of the waste deposits. Gravity modelling and interpretation were supported with data from resistivity profiles carried out in the immediate vicinity of the gravity measurements, i.e. the resistivity profiles interpretation results constrained the thickness of landfill deposits.


PACS

93.85.Hj Gravity methods

91.10.Op Gravity anomalies; time variable gravity

89.60.-k Environmental studies

Subjects

Instrumentation and measurement

Environmental and Earth science

Dates

Issue 4 (December 2009)

Received 7 March 2009, accepted for publication 8 September 2009

Published 29 September 2009



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