INVESTIGATION OF SUBSURFACE GROUNDWATER USING THE VES METHOD AROUND DENDAM LAKE, BENGKULU CITY, INDONESIA

Faritz Bagda Maghribi; Refrizon Refrizon; Suhendra Suhendra; Darmawan Ikhlas Fadli; Halauddin; Beni Syakban  Idris; Henny  Johan; Eli Putriani

doi:10.21009/SPEKTRA.082.04

Authors

Faritz Bagda Maghribi Study Program of Geophysics, Faculty of Mathematics and Natural Sciences, University of Bengkulu, Jl. WR. Supratman Kandang Limun, Muara Bangkahulu, Bengkulu 38371, Indonesia
Refrizon Refrizon Study Program of Geophysics, Faculty of Mathematics and Natural Sciences, University of Bengkulu, Jl. WR. Supratman Kandang Limun, Muara Bangkahulu, Bengkulu 38371, Indonesia
Suhendra Suhendra Study Program of Geophysics, Faculty of Mathematics and Natural Sciences, University of Bengkulu, Jl. WR. Supratman Kandang Limun, Muara Bangkahulu, Bengkulu 38371, Indonesia
Darmawan Ikhlas Fadli Study Program of Geophysics, Faculty of Mathematics and Natural Sciences, University of Bengkulu, Jl. WR. Supratman Kandang Limun, Muara Bangkahulu, Bengkulu 38371, Indonesia
Halauddin Study Program of Geophysics, Faculty of Mathematics and Natural Sciences, University of Bengkulu, Jl. WR. Supratman Kandang Limun, Muara Bangkahulu, Bengkulu 38371, Indonesia
Beni Syakban Idris Study Program of Geophysics, Faculty of Mathematics and Natural Sciences, University of Bengkulu, Jl. WR. Supratman Kandang Limun, Muara Bangkahulu, Bengkulu 38371, Indonesia
Henny Johan Study Program of Magister of Science Education, University of Bengkulu, Jl. WR. Supratman Kandang Limun, Muara Bangkahulu, Bengkulu 38371, Indonesia
Eli Putriani Department of Geoscience, National Taiwan University, Roosevelt Road, Taipei 106, Taiwan

DOI:

https://doi.org/10.21009/SPEKTRA.082.04

Keywords:

Dendam Lake, resistivity, shallow groundwater, vertical electrical sounding

Abstract

Concerns have been raised over the availability of water in the Dendam Lake neighborhood of Bengkulu City and the areas surrounding it. The location is characterized by a number of unsuccessful water wells. These issues are the direct and indirect results of the geological formations that are present in the region, specifically Aluvium (which consists of boulders, clasts, sand, silt, mud, and clay). A MAE X-612 EM resistivity meter was utilized in order to get a total of twenty Vertical Electric Sounding (VES) measurement points. Using the software programs Progress and Surfer, the data that was gathered was plotted on a two-log graph. The geoelectric layer and layer parameter maps that were made were prepared with the use of quantitative and qualitative interpretations. It was determined that there were between three and five geoelectric layers. It has been demonstrated that the resistivity of the subsurface shallow groundwater zone ranges from 10 to 20 Ωm at a depth of 4 to 15 meters. According to the findings of this research project, employing the VES geo-electrical exploration approach is likely capable of effectively outlining the subsurface and shallow groundwater. In addition, there is no information available regarding the precise depth of the groundwater table in the region. On the other hand, the underground groundwater at this location has a depth that is shallower than the norm.

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