Uso do atributo amplitude instantânea do dado gpr na avaliação do teor de umidade de solos e sedimentos

Abstract

ABSTRACT. This paper presents results of a study conducted on laboratory and field in order to analyze the parameter amplitude of electromagnetic wave in qualitative assessment of soil moisture contents. We obtained empirical correlations between instantaneous amplitude of the wave, recorded by GPR -Ground Penetrating Radar, and the values of volumetric sediment moisture contents, obtained by TDR -Time Domain Reflectometer, in laboratory experiment as well as in soil samples in a field experiment. Results showed that there is a strong correlation between environmental moisture contents and instantaneous amplitude parameter of electromagnetic wave.In controlled laboratory conditions, this correlation showed a strong coefficient of determination. However, in the field experiment, the coefficient was only 0.64 due to the small amount of data used. This method is easy to implement through a processing flowchart of rapid execution, and can be used in addition to the velocity attribute usually employed in these correlations.

Current uses of ground penetrating radar in groundwater-dependent ecosystems research

“…Steelman and Endres (2011) reported accuracy levels after analysing the behaviour of some petrophysical relationships for several types of geological materials and antenna frequencies ( Table 2). The early-time technique estimates GPR θ without v while changes in amplitude attributes of the combined air wave and ground wave of the reflected signal collected through common offset configurations are used to map ε r (Prado et al, 2011;Ferrara et al, 2013;Algeo et al, 2016).…”