The use of elastic and electromagnetic waves to monitor soil properties provides complementary information about stiffness and phase distribution. This paper presents a methodology for monitoring electromagnetic (ELM) and elastic wave parameters as the soil is being inundated with water. The approach helps relating volumetric water content to stiffness and hints to the use of the technique for nondestructive evaluation of in situ water content and mass density of soils. The methodology is tested using a simple numerical study that incorporates errors in the simulated measurement of volumetric water content and P-wave velocity. Results show that even with the presence of errors, the inverted results match the simulated values of mass density and water content. The development of such a technique opens an opportunity for the advancement in measurement practices over time-consuming and destructive techniques (e.g., sand cone and water balloon methods) and for the replacement of regulated materials (i.e., nuclear moisture-density apparatus).
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