Science and technological developments: article

Аnnotation: In solving of problems of shallow electrical survey, a relief is a factor that has significant impact on result of inversion of field electrical resistivity tomography data. It’s verification is a very difficult task due to the complex structure of the real geological environment. At the same time, the development of computer numerical modeling methods allows obtaining electrical resistivity tomography data for simple models. The paper presents an estimation of effect of the simplest landforms on the results of the inversion of electrical resistivity mography data. Data is obtained by numerical modeling based on the finite element method at the same time by an inversion-independent technique, on the example of the model of the trench of triangular cross-section. It is determined that the inversion for the trench in homogeneous half-space produces false anomalies, the maximum of which is located under the axis of the trench. Separately, it is shown that in the presence of real inhomogeneity in this position, it can, depending on its resistance, be masked (compensated) by the maximum of false anomalies, or strengthen it. If the trench is in two-layer medium, then there is distortion of the boundary between the layers at some interval under the trench, shaped like it.