Aplicação geofísica para a caracterização do perfil do solo de uma vertente associada a processo erosivo linear no município de Sorriso-MT.

Abstract

The objective of this work was to identify the stratigraphic variation of the subsoil and the seasonal variation of the water table with the purpose of comprehending the dynamics of the formation process of profound lineal erosions in a associated slope to a big rills in the Municipal district of Sorriso - MT. The field surveys consisted of acquisitions of direct geological data, obtained through for manual probing holes and superficial observations, together with geophysical surveys of resistivity and ground penetrating radar (GPR) methods. After the modeling and interpretation of the geophysical data with base in the information obtained geological through of the manual probing holes, it was possible to evaluate the utilization potentiality of the resistivity method to identify the seasonal variation of the water table. The vertical electrical sounding (VES's) identified resistive and conductive horizons, correlated with the pedologic variation, the top of the rock and the depth of the top level water. The GPR method proved effective to map structures of subsoil that allowed to identify the depth of the top level water and the top of rock. The geophysical results were adjusted from the geological information of wells of top level water controling and manual probing holes, allowing investigations up to 30m of depth (VES's) with good lateral resolution (GPR), enabling the delineation of the stratigraphic variation and the top level water along the studied slope.