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Magnetics, 2-D resistivity and geotechnical studies for shallow subsurface soil characterization in Lembah Bujang, Kedah
Samuel, Yakubu Mingyi1, Rosli Saad2, Nordiana Mohd Muztaza3, Nur Azwin Ismail4, Mohd Mokhtar Saidin5.
Magnetic and 2-D resistivity surveys were conducted on the same line for soil
characterizations. 2-D resistivity survey employed Pole-dipole array with 1 m electrode
spacing while magnetic survey employed 2 m station spacing. Soil drilling was
performed using hand auger at the 21st m on the line with 0.2 m sampling interval. All
data were processed and overlaid for integration and validation. The magnetic results
showed the distribution of magnetic residual as -4.55 to 1.61 nT, with the magnetic low
(-4.55 to -0.058 nT) was identified at distances 10 to 26 m, 36 to 44 m, 74 to 82 m, 88
to105 m, 120 m and 150 m. Three zones were identified based on the 2-D resistivity
results; low (16.9-35.2 Ω-m), moderate (73.3-152 Ω-m) and high (317-1373 Ω-m). The low
resistivity values might be due to clay with high water content, and the low magnetic
susceptibility distributions were due to soil of sedimentary origin. The samples obtained
were sticky with variable sizes, greyish to brownish/reddish in color, and some of the
samples exhibited the presence of shiny and black spots. The characteristics of the
samples suggested that the soil was a product of completely weathered rock,
classified as Grade V with high water contents and weak
Affiliation:
- Universiti Sains Malaysia, Malaysia
- Universiti Sains Malaysia, Malaysia
- Universiti Sains Malaysia, Malaysia
- Universiti Sains Malaysia, Malaysia
- Universiti Sains Malaysia, Malaysia
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Indexed by |
MyJurnal (2021) |
H-Index
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6 |
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0.000 |
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0 |
Indexed by |
Scopus 2020 |
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CiteScore (1.4) |
Rank |
Q3 (Engineering (all)) |
Additional Information |
SJR (0.191) |
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