TITLE:
Geoelectrical Survey for Engineering Investigation
AUTHORS:
A. H. A Teh Saufia, Rosli Saad, M. M. Nordiana, I. N. Azwin, Andy A. Bery, Noer El Hidayah Ismail, Nisa’ Ali, Mark Jinmin, Y. C. Kiu, S. L. Ragu Ragava R.
KEYWORDS:
Geoelectrical; 2D Resistivity; Self Potential; Engineering
JOURNAL NAME:
Open Journal of Geology,
Vol.3 No.2B,
October
22,
2013
ABSTRACT: Water seepage erosion has been and remains one of the
major engineering problems. However, most engineers will much depend on
borehole data and soil test for designing and problem detection. By considering
of the cost and destructive method, selection of geoelectrical prospecting
would be appropriate. Therefore, two electrical geophysical surveys were
carried out in Sekolah Menengah Kebangsaan Dato’ Haji Mohd Nor, Gelugor, Pulau
Pinang to map the presence of the unknown underground water sources (saturated
zones) and its movement. With the total of seven resistivity lines parallel to
each other and self potential (SP) with 5 m × 5 m
gridding survey were successfully done. The resistivity result from line 1 (R1)
to line 6 (R6) shows the subsurface consist of saturated zones with range between 3 m up to
10 m depth, before it reaches the R7 which is believed as the
accumulation zone. Meanwhile, as for SP result it shows the water flow from
higher value (north-east) towards the lower value which is mostly at the south
area. In conclusion, geoelectrical survey could assist in detecting and solving
engineering problems as it proven by the result from each method.