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Groundwater Exploration through 2D Electrical Resistivity Tomography in the Labi Agricultural Site, Belait District, Brunei Darussalam |
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| รหัสดีโอไอ | |
| Creator | Siti Lieyana Azffri |
| Title | Groundwater Exploration through 2D Electrical Resistivity Tomography in the Labi Agricultural Site, Belait District, Brunei Darussalam |
| Contributor | Aziz Soffre Ali Ahmad, Mohammad Faizan Ibrahim, Amalina Abdul Khalid, James Jasmir Murphy, Stefan Herwig G?deke |
| Publisher | Department of Mineral Resources of Thailand |
| Publication Year | 2565 |
| Journal Title | Thai Geoscience Journal |
| Journal Vol. | 3 |
| Journal No. | 3 |
| Page no. | 1-9 |
| Keyword | Agricultural Site, Electrical Resistivity Tomography, Groundwater |
| URL Website | http://www.dmr.go.th/tgjdmr/n_more_news.php?nid=5 |
| Website title | กรมทรัพยากรธรณี, THAI GEOSCIENCE JOURNAL |
| Abstract | Over the years, Brunei has relied on surface water as the primary water source for domestic, industrial and agricultural use. Increasing demands for irrigation water supply in its growing agriculture sector, has led to groundwater exploration at the Labi agricultural site driven by the Brunei Government. Electrical Resistivity Tomography (ERT) has been used extensively to delineate subsurface structures, formations and groundwater prospect zones. The technique was employed for the study area using the pole-dipole array configuration with a survey line of 300 m and a target investigation depth of 100 m from the surface. The 2D inverted resistivity model revealed a groundwater zone at depths of about 10 to 40 m from the surface with resistivity values ranging from 5 to 100 ohm-m. A borehole was drilled through this zone to a maximum depth of 80 m from the surface. The borehole drilling encountered multiple saturated layers of sand and sandstone between depths of 4 to 78 m. A pumping test showed the groundwater was able to be produced at a steady rate of 288 m?/day. The aquifer transmissivity estimated using the unsteady Cooper Jacob analysis was 109 m?/day, indicating moderate potential for groundwater usage in the study area for irrigation purposes. The resistivity survey, combined with borehole drilling and testing, provided insights into the groundwater hydrology at the Labi agricultural site. The present study helped decision-makers take suitable measures to place future irrigation wells and achieve significant groundwater exploration results in the study area and other regions with similar geological settings. |
