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Near‐surface geophysical imaging of a thermokarst pond in the discontinuous permafrost zone in Nunavik (Québec), Canada

Author

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  • Léa Bussière
  • Myriam Schmutz
  • Richard Fortier
  • Jean‐Michel Lemieux
  • Alain Dupuy

Abstract

In this study, high resolution ground‐penetrating radar (GPR), electrical resistivity tomography (ERT), and spectral‐induced polarization tomography (SIPT) were used to (i) delineate characteristic solifluction features, (ii) map the ice distribution, and (iii) assess subsurface water content and permeability in the surrounding rampart of a thermokarst pond in the discontinuous permafrost zone. The study site is located in the Tasiapik Valley near Umiujaq in Nunavik (Québec), Canada, which benefits from decades of geological mapping, geophysical investigation, and monitoring of ground temperature and thaw subsidence, providing an extensive understanding of the cryohydrogeological context of the area. The results of geophysical investigation undertaken in this study were cross validated using core sampling, laboratory core analysis, and in situ ground temperature and water content monitoring. Based on this investigation, a conceptual model was derived and compared to the stratigraphy of cross‐section described in literature in finer‐grained context. Very good consistency was found from one in situ geophysical survey to another, as well as between the derived stratigraphic models and the ground truth. The combination of all the available data allowed the development of a detailed cryohydrogeological model across the studied thermokarst pond, which highlights the effect of lithology, topography, and land cover on the distribution and mobility of water in the ground.

Suggested Citation

  • Léa Bussière & Myriam Schmutz & Richard Fortier & Jean‐Michel Lemieux & Alain Dupuy, 2022. "Near‐surface geophysical imaging of a thermokarst pond in the discontinuous permafrost zone in Nunavik (Québec), Canada," Permafrost and Periglacial Processes, John Wiley & Sons, vol. 33(4), pages 353-369, October.
    • Handle: RePEc:wly:perpro:v:33:y:2022:i:4:p:353-369
    DOI: 10.1002/ppp.2166
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    References listed on IDEAS

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    1. Martin A. Briggs & Seth Campbell & Jay Nolan & Michelle A. Walvoord & Dimitrios Ntarlagiannis & Frederick D. Day‐Lewis & John W. Lane, 2017. "Surface Geophysical Methods for Characterising Frozen Ground in Transitional Permafrost Landscapes," Permafrost and Periglacial Processes, John Wiley & Sons, vol. 28(1), pages 52-65, January.
    2. Christian Hauck & Ketil Isaksen & Daniel Vonder Mühll & Johan Ludvig Sollid, 2004. "Geophysical surveys designed to delineate the altitudinal limit of mountain permafrost: an example from Jotunheimen, Norway," Permafrost and Periglacial Processes, John Wiley & Sons, vol. 15(3), pages 191-205, July.
    3. Lingxiao Wang & Maxime Jolivel & Philip Marzahn & Monique Bernier & Ralf Ludwig, 2018. "Thermokarst pond dynamics in subarctic environment monitoring with radar remote sensing," Permafrost and Periglacial Processes, John Wiley & Sons, vol. 29(4), pages 231-245, October.
    4. Christof Kneisel & Christian Hauck & Richard Fortier & Brian Moorman, 2008. "Advances in geophysical methods for permafrost investigations," Permafrost and Periglacial Processes, John Wiley & Sons, vol. 19(2), pages 157-178, April.
    5. Christian Hauck, 2013. "New Concepts in Geophysical Surveying and Data Interpretation for Permafrost Terrain," Permafrost and Periglacial Processes, John Wiley & Sons, vol. 24(2), pages 131-137, April.
    6. Kenji Yoshikawa & Larry D. Hinzman, 2003. "Shrinking thermokarst ponds and groundwater dynamics in discontinuous permafrost near council, Alaska," Permafrost and Periglacial Processes, John Wiley & Sons, vol. 14(2), pages 151-160, April.
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