Salt water wedge

Syscal, Promis

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Salt water wedge

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In coastal areas, the multiplication of groundwater pumping can sometime modify the natural salt water wedge and create salted water intrusion under land area. This intrusion may have a catastrophic impact on water resource, agriculture and industry (Werner et al., 2013).
To measure the extension of the salt water wedge in lands, electrical resistivity soundings, tomography or monitoring can be performed (Nowroozi et al., 1999, Rey et al., 2013, De Franco et al., 2009) with the Syscal and Syscal Switch range (Syscal Junior / Syscal Junior Switch / Syscal R1 / Syscal R1 Switch / Syscal R2 / Syscal Pro / Syscal Pro Switch).

The measurement of the soil electrical resistivity can also be performed using the Promis 10 Slingram type EM profiler that allows to measure the soil electrical resistivity with a high productivity.

Documentation

    References

    De Franco, R., Biella, G., Tosi, L., Teatini, P., Lozej, A., Chiozzotto, B., ... & Bassan, V. (2009). Monitoring the saltwater intrusion by time lapse electrical resistivity tomography: The Chioggia test site (Venice Lagoon, Italy). Journal of Applied Geophysics, 69(3), 117-130.

    Girard, J. F., Boucher, M., Legchenko, A., & Baltassat, J. M. (2005, September). Numerical modeling of magnetic resonance signal from water-filled cavities. In Near Surface 2005-11th European Meeting of Environmental and Engineering Geophysics.

    Koch, K., Wenninger, J., Uhlenbrook, S., & Bonell, M. (2009). Joint interpretation of hydrological and geophysical data: electrical resistivity tomography results from a process hydrological research site in the Black Forest Mountains, Germany. Hydrological Processes, 23(10), 1501-1513.

    Legchenko, A., Descloitres, M., Bost, A., Ruiz, L., Reddy, M., Girard, J. F., ... & Braun, J. J. (2006). Resolution of MRS Applied to the Characterization of Hard‐Rock Aquifers. Ground Water, 44(4), 547-554.

    Legchenko, A. (2013). Magnetic resonance imaging for groundwater. John Wiley & Sons.

    Nowroozi, A. A., Horrocks, S. B., & Henderson, P. (1999). Saltwater intrusion into the freshwater aquifer in the eastern shore of Virginia: a reconnaissance electrical resistivity survey. Journal of Applied Geophysics, 42(1), 1-22.

    Rey, J., Martínez, J., Barberá, G. G., García-Aróstegui, J. L., García-Pintado, J., & Martínez-Vicente, D. (2013). Geophysical characterization of the complex dynamics of groundwater and seawater exchange in a highly stressed aquifer system linked to a coastal lagoon (SE Spain). Environmental earth sciences, 70(5), 2271-2282.

    Vincent, C., Thibert, E., Gagliardini, O., Legchenko, A., Gilbert, A., Garambois, S., ... & Girard, J. F. (2015). Mechanisms of subglacial cavity filling in Glacier de Tête Rousse, French Alps. Journal of Glaciology, 61(228), 609-623.

    Vouillamoz, J. M., Legchenko, A., Albouy, Y., Bakalowicz, M., Baltassat, J. M., & Al‐Fares, W. (2003). Localization of saturated karst aquifer with magnetic resonance sounding and resistivity imagery. Ground water, 41(5), 578-586.

    Vouillamoz, J. M., Chatenoux, B., Mathieu, F., Baltassat, J. M., & Legchenko, A. (2005, September). Characterization of unconsolidated coastal aquifers with magnetic resonance and electrical soundings. In Near Surface 2005-11th European Meeting of Environmental and Engineering Geophysics.

    Werner, A. D., Bakker, M., Post, V. E., Vandenbohede, A., Lu, C., Ataie-Ashtiani, B., ... & Barry, D. A. (2013). Seawater intrusion processes, investigation and management: recent advances and future challenges. Advances in Water Resources, 51, 3-26.

    Wyns, R., Baltassat, J. M., Lachassagne, P., Legchenko, A., Vairon, J., & Mathieu, F. (2004). Application of proton magnetic resonance soundings to groundwater reserve mapping in weathered basement rocks (Brittany, France). Bulletin de la société géologique de France, 175(1), 21-34.

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