P102 Reflection of GPR Waves from the Transition Zone above a Water Table. An Analytical Approach in Frequency Domain M. Bano* (University of Strasbourg) SUMMARY The capillary fringe is the nearly-saturated zone right above the water table in which water rises by capillarity from the water table toward the surface. The water table and capillary fringe together form the saturated zone which is susceptible to be imaged by GPR reflections. Above the saturated zone the saturation decreases gradually upwards implying an increase of the velocity of EM waves. This is the “transition zone” which thickness depends on the pore-size distribution


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