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Effectiveness of geophysical surveys for water wells relocation in overexploited aquifers (the example of Maggiore and Traversola Valleys, Northwestern Italy)

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Abstract

Aquifer overexploitation is a common problem in drinking water management. This will become more and more important given the general reduction of water resources. To overcome overexploitation, one of the most adopted solutions is the relocation of extraction wells. To establish the positions of new wells, a precise knowledge of the hydrogeological setting is required. Specific surveys are therefore necessary to obtain information over wide investigation zones. Geophysical methods, particularly electromagnetic and electrical, can be useful with this aim. In the present paper a case history on the combined use of Electric Resistivity Tomography and Time Domain Electromagnetic soundings is reported. Surveys have been performed within the Maggiore and Traversola Valleys, to investigate the uppermost part of the Quaternary deposits, hosting the near surface aquifer. The electromagnetic data have been inverted with a spatially constrained approach by assuming a quasi 1D model of the subsurface. Geophysical surveys allowed for depicting the depth and lateral continuity of the supposed aquifer level in the surveyed area up to a depth of about 200 m and proposing potential positions for well relocation.

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Acknowledgements

Authors are indebted with the management authorities (ATO 5–Ambito Territoriale Ottimale n.5 Astigiano Monferrato) for funding the surveys object of this work.

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Authors and Affiliations

  1. DST, Università degli Studi di Torino, Turin, Italy

    Domenico Antonio De Luca, Cesare Comina, Manuela Lasagna, Enrico Destefanis & Luciano Masciocco

  2. DIATI, Politecnico di Torino, Turin, Italy

    Alberto Godio

  3. GAMUT S.r.l. - Spin off Company of Politecnico di Torino, Turin, Italy

    Stefano Stocco

Authors
  1. Domenico Antonio De Luca
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  2. Cesare Comina
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  3. Manuela Lasagna
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  4. Enrico Destefanis
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  5. Luciano Masciocco
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  6. Alberto Godio
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  7. Stefano Stocco
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Correspondence to Cesare Comina.

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De Luca, D.A., Comina, C., Lasagna, M. et al. Effectiveness of geophysical surveys for water wells relocation in overexploited aquifers (the example of Maggiore and Traversola Valleys, Northwestern Italy). Environ Earth Sci 77, 19 (2018). https://doi.org/10.1007/s12665-017-7218-0

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