Modeling of GPR Reflections and Water Content Estimation of Moist Soils

P-144 Introduction MAKSIM BANO and JEAN-FRANÇOIS GIRARD Laboratoire Proche Surface EOST ULP (UMR -7516) 5 rue René Descartes 67084 Strasbourg France Recent studies have shown that Ground-penetrating radar (GPR) is an efficient geophysical method to image the internal structures of aeolian dunes (Bristow et al. 1996; Bano et al. 1999). In these studies changes in water content are believed to cause the radar reflections observed inside the present-day dunes. Greaves et al. (1996) have shown that radar interval velocity (calculated from the normal moveout of the multi-offset GPR data) can be used to estimate water content when the subsurface is