Results of the geological structure recognition of chosen grounds tested by the method of electrical resistivity tomography are presented. In Warsaw (Poland), four areas of a different geological structure and of different origin were selected. They are two areas in the Vistula river valley and two areas on a glacial plateau. The geological structure of the areas was confirmed by the documentary evidence of drillings and geological cross-sections. Investigations were executed by the electrical resistivity tomography method, which allowed in a 2D scheme to present the distribution of real resistivity in the soil. The obtained distribution of electric resistivity was correlated with the lithology of soils indicated by geological drillings. The results of investigations executed by the method of electrical resistivity tomography prove a relationship between the distribution of electric resistivity and the geological structure. This relationship is well visible in simple geological structures, particularly where soils have contrasting values of electric resistivity, e. g., sands and clays or dry and saturated sands. In the case of complex
geological conditions with a wide range of variations, the measured picture of electric resistivity distribution did not agree with the geological cross-section.

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2011 - Vol.53
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