INTERPRETATION OF SELF-POTENTIAL DATA AROUND THE FIELD OF EAST HALL BANDUNG INSTITUTE OF TECHNOLOGY TO DETERMINE THE SUBSURFACE ANOMALY
The self-potential (SP) method is one of the geophysical methods that works by measuring static natural voltage present in a group of points on the ground surface. This method is passive, as it utilizes measurements of naturally occurring potential differences without injecting electric currents...
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| 主要作者: | |
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| 格式: | Final Project |
| 語言: | Indonesia |
| 在線閱讀: | https://digilib.itb.ac.id/gdl/view/75752 |
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| 機構: | Institut Teknologi Bandung |
| 語言: | Indonesia |
| 總結: | The self-potential (SP) method is one of the geophysical methods that works by
measuring static natural voltage present in a group of points on the ground surface.
This method is passive, as it utilizes measurements of naturally occurring potential
differences without injecting electric currents through the ground surface. The
purpose of this research is to determine the distribution of potential values, identify
the direction of subsurface fluid flow, determine the geometric shape, and the depth
of the anomaly source in the research area. Data acquisition is performed using a
fixed-based electrode method with 11 measurement lines and a total of 165 points.
The distance between points is 2.5 meters, and the distance between measurement
lines is 5 meters. The obtained electric potential data is then qualitatively interpreted
using SURFER 13 application to generate isopotential contour of the research area,
with the lowest value is -110 mV and the highest value is 130 mV. Based on the
isopotential contour and topographic effects, it can be predicted that fluid flow
occurs from the north to the south in the research area. Subsequently, quantitative
interpretation is conducted by performing forward modelling and inverse modelling
in MATLAB, which reveals that the subsurface anomaly appears as a horizontal
cylinder with a depth of 4.53 meters. |
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