|
Identification of the existence of subsurface pipes using the electrical resistivity method a) Faculty of Mathematics and Natural Sciences (FMIPA), Bandung Institute of Technology Abstract Subsurface investigation is an important start to obtain complete information about subsurface conditions. Often beneath the surface are objects such as pipes, cables, and other utilities. Before digging or drilling, it is very important to know their exact presence and depth. Many studies use geophysical methods to identify the presence of subsurface objects. This thesis uses the electrical resistivity method which is one of the geophysical methods to identify the presence of subsurface pipes. This electrical resistivity method analyzes the distribution of subsurface resistivity values from the electric potential values obtained when injecting direct current (DC) into the subsurface. The data acquisition technique of the electrical resistivity method is perpendicular (90 degrees) to the pipe axis, the measurement system uses 32 electrodes and the distance between the electrodes used is 1 meter. This study varies the types of Wenner Alpha, Wenner-Schlumberger, and Dipole-Dipole configurations. The purpose of this configuration variation is to be able to find out the ^best^ configuration when conducting a survey related to the identification of subsurface pipes. Forward modeling is done by placing the pipe anomaly at a depth of 1 meter below the surface to obtain synthetic data. After processing the data using least-square inversion, then analyzing and interpreting the data, from the 3 types of configurations used, the dipole-dipole configuration produces a better 2D model for identifying subsurface pipes compared to other configurations Keywords: Electrical resistivity method, Pipes, Forward modeling, Least square inversion Topic: PHYSICAL SCIENCES |
| ICMNS 2023 Conference | Conference Management System |