Experience of karst localization using magnetic resonance soundings

The main advantage of the Magnetic Resonance Sounding method (MRS), compared with other geophysical tools for water prospecting is that the MRS is sensitive only to subsurface water (Schirov, et al., 1991). Inversion of MRS field data reveals the water content and the relaxation time T with r being the coordinate vector (Legchenko, and Shushakov, 1998; Legchenko, et al., 2002). In a porous medium the relaxation time T is proportional to the mean pore size 1 (Kenyon, et al., 1997), where and V are the surface and volume of pores respectively.