Abstract
This paper shows the potential of gravity data to map a buried landfill bottom topography. To this end, a gravity inversion method is presented for estimating the landfill’s bottom depths at discrete points assuming a decrease of the density contrast with depth according to a hyperbolic law. The method’s efficiency was tested using synthetic data from simulated waste landfills, producing estimated bottom topographies very close to the true ones. The method’s potentiality has been further evaluated in applying it to the gravity data from the abandoned Thomas Farm Landfill site, Indiana, USA, whose bottom topography is known. The estimated topography showed close agreement with the known Thomas Farm Landfill’s bottom topography.
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Acknowledgments
We thank the editor-in-chief Philip LaMoreaux and an anonymous reviewer whose constructive comments have helped to improve the paper. Conselho Nacional de Desenvolvimento Cientàfico e Tecnológico (CNPq), Brazil, supported the authors in this research. Additional support for V.C.F. Barbosa was provided by FAPERJ (Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro) under contract E-26/100.688/2007 and CNPq under contracts: 474878/2006-6 and 471913/2007-3.
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Silva, J.B.C., Teixeira, W.A. & Barbosa, V.C.F. Gravity data as a tool for landfill study. Environ Geol 57, 749–757 (2009). https://doi.org/10.1007/s00254-008-1353-6
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DOI: https://doi.org/10.1007/s00254-008-1353-6