Stratigraphy of the Soil layers of Bosita Area using Ground Penetrating Radar

Abstract

The application of Ground Penetrating Radar (GPR) remains a pivotal geophysical methodology for the non-invasive high-resolution imaging of pedogenic and lithological stratigraphy. This investigation delineates the subsurface architectural framework of a 1-hectare study site in the Bosita area, extending to a vertical depth of 22 meters. Utilizing a strategic survey grid, six geophysical profiles were executed, comprising four peripheral boundary transects and two internal diagonal intersections, encompassing a cumulative linear distance of 454 meters. Radargram acquisition was subjected to rigorous digital signal processing, employing advanced filtering algorithms to enhance the signal-to-noise ratio and resolve complex dielectric interfaces. The synthesized data facilitated a comprehensive interpretation of the phreatic zone (water table) depth and the elucidation of the stratigraphic sequence. Results reveal significant lateral and vertical heterogeneity, driven by pronounced lithofacies transitions within the sedimentary record. The interpretation identifies four distinct primary lithostratigraphic units attributable to recent Quaternary deposits. These findings underscore the efficacy of electromagnetic induction in mapping depositional facies and characterizing the structural complexity of Holocene-Pleistocene terrestrial successions.