Experiments with surface NMR for improved measurements and inversion

With the rather new method of surface nuclear magnetic resonance (SNMR) for which meanwhile a commercial equipment is available, direct proof of the existence of groundwater and also study of aquifer parameters is now possible (Schirov et al. 1991, Beauce et al. 1996). In SNMR signal the amplitudes are directly related to the water content, while the decay times are linked to pore size, grain size and, therefore, to hydraulic conductivities. The phases are related to the electrical conductivity, however, this is only used qualitatively.