Strategy for Optimization of Arbitrary Electrode Distribution for 3D Electrical Resistivity Tomography in Urban Zones

Autor: Anxing Zou, Xia Guo, Lincheng Jiang, Huanyuan Chen, Amr Abd El-Raouf, Gang Tian, Bangbing Wang, Xinxin He
Rok vydání: 2021
Předmět:
Zdroj: Pure and Applied Geophysics. 178:3601-3618
ISSN: 1420-9136
0033-4553
DOI: 10.1007/s00024-021-02848-2
Popis: In urban areas, dense buildings, traffic road networks, and concrete floors severely restrict geoelectric methods, preventing the arrangement of ideal straight lines or grid survey layouts. We present herein an optimized three-dimensional (3D) electrical resistivity tomography (ERT) survey design based on arbitrarily distributed electrodes with a dipole–dipole array as the basic unit. Each unit is independent and can be randomly distributed and adjusted in length. The component electrodes can be used as current or potential electrodes as required. This method can eliminate the limitations of grids and cables. However, the random distribution of electrodes does not mean that there are no restrictions, as one must optimize the most suitable ones based on measurements showing data volumes that far exceed those of conventional survey designs. The compared target resolution by batch method is used as the optimized array. It focuses on the target area and filters out data before the Compare-R calculation is applied. This is faster than the traditional Compare-R algorithm due to its batch calculation. Furthermore, the frequency of electrodes was analyzed to reduce the number of electrodes used while maintaining good results. A field example with drilling information verification demonstrates the effectiveness of the method. We use the adjusted optimization method for the random distribution of electrodes in the exploration design, achieving good imaging results in combination.
Databáze: OpenAIRE
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