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Magnetic Resonance Sounding Applied to Aquifer Characterization

Abstract : Magnetic resonance sounding (MRS) is distinguished from other geophysical tools used for ground water investigation by the fact that it measures a magnetic resonance signal generated directly from subsurface water molecules. An alternating current pulse energizes a wire loop on the ground surface and the MRS signal is generated; subsurface water is indicated, with a high degree of reliability, by nonzero amplitude readings. Measurements with varied pulse magnitudes then reveal the depth and thickness of water saturated layers. The hydraulic conductivity of aquifers can also be estimated using boreholes for calibration. MRS can be used for both predicting the yield of water supply wells and for interpolation between boreholes, thereby reducing the number of holes required for hydrogeological modeling. An example of the practical application of MRS combined with two-dimensional electrical imaging, in the Ker-bernez and Kerien catchments area of France, demonstrates the efficiency of the technique.
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https://hal-brgm.archives-ouvertes.fr/hal-03784066
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Soumis le : jeudi 22 septembre 2022 - 16:07:24
Dernière modification le : samedi 24 septembre 2022 - 03:23:03

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Anatoly Legchenko, Jean-Michel Baltassat, Alexey Bobachev, Charlotte Martin, Henri Robain, et al.. Magnetic Resonance Sounding Applied to Aquifer Characterization. Groundwater, Wiley, 2004, 42 (3), pp.363-373. ⟨10.1111/j.1745-6584.2004.tb02684.x⟩. ⟨hal-03784066⟩

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