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Fig. 3. (a) Two-dimensional volumetric water content tomogram for the saturated zone, calculated from the interwell velocity tomogram and the Burggeman–Hanai–Sen mixing formula (Sen et al., 1981; Feng and Sen, 1985). The white Xs indicate the transmitter and receiver station locations. (b) Measured water content (
) variation vs. depth between the two boreholes on the right side of the section. In the saturated zone, the water content is equal to the porosity (
). Above the water table, the porosity was measured in the laboratory on cores collected during drilling. The locations and measured values of the porosity are indicated by filled circles.
