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Quality Control of Electrotomography Data and the Problem of Strong Interference
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, Engineering and Mining Geophysics 2019 15th Conference and Exhibition, Apr 2019, Volume 2019, p.1 - 7
Abstract
Simple and comprehensible technology of electrical resistivity tomography (ERT) quality control can be inversion accuracy. When this accuracy is unacceptable one need additional estimations of quality control: pseudo crosssections visualization, decrease of signal with array distance at sounding curves, statistical distributions of sounding data with array distance, diagrams of current and voltage signals, estimation of practical ERT depth and its comparison with maximal depth in such conditions. These ERT quality control estimations we applied to ERT data obtained at some study area in Moscow region with average inversion error 26.6% and maximal one above 40%. The main cause of bad ERT quality was high level of 50 Hz industrial noise. In such condition we need such ERT instrumentation that instead of high measuring speed can give us high ERT data quality.