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All Journal Eksakta : Berkala Ilmiah Bidang MIPA
Budy Santoso
Department of Geophysics, Faculty of Mathematics and Natural Science, Universitas Padjadjaran, Indonesia
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Identification of Aquifer Potential Using Electrical Resistivity Tomography (ERT) Method in the Karst Area of Giritontro, Wonogiri, Central Java Nadia Putri Nur Asri; Rahma Puspa; Anggara Putra Prasetya; Budy Santoso
EKSAKTA: Berkala Ilmiah Bidang MIPA Vol. 27 No. 01 (2026): Eksakta : Berkala Ilmiah Bidang MIPA (E-ISSN : 2549-7464)
Publisher : Faculty of Mathematics and Natural Sciences (FMIPA), Universitas Negeri Padang, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/eksakta/vol27-iss01/605

Abstract

Karst regions exhibit unique geological characteristics due to the dissolution of carbonate rocks, lending to the formation of complex underground aquifer systems. This study was conducted in BayemharjoVillage, Giritontro Sub-district, Wonogiri Regency part of the Sewu Karst Zone to identify aquifer potential using the dipole dipole electrical resistivity method. The survey was carried out along three measurement lines ranging from 216 to 710 meters in length, utilizing 72 electrodes with 10 meter spacing. The research involved data acquisition, processing, and interpretation using specialized resistivity software. Interpretation result revealed rock layers with potential as aquifers, particulary those with porous and permeable lithologies such as sandy limestone. Additionally, the presence of aquitard and aquiclude layers was identified, acting as barriers or flow paths for groundwater movement. The resistivity patterns and geological structures indicate the existence of groundwater pockets at various depths, which are crucial for managing clean water resources in this drought-prone region. The resistivity method prove to be effective in delineating aquifers zone within the complex karst environment.
Aquifer Identification Using the Schlumberger Vertical Electrical Sounding (VES) Method in Mulyojati Village, Metro Barat Subdistrict, Metro City Difa Mutafawwiqoh; Anggara Putra Prasetyo; Acep Ruchimat; Budy Santoso
EKSAKTA: Berkala Ilmiah Bidang MIPA Vol. 27 No. 01 (2026): Eksakta : Berkala Ilmiah Bidang MIPA (E-ISSN : 2549-7464)
Publisher : Faculty of Mathematics and Natural Sciences (FMIPA), Universitas Negeri Padang, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/eksakta/vol27-iss01/650

Abstract

Groundwater is ideally expected to be available in a sustainable manner and managed based on adequate subsurface hydrogeological information. However, conditions in Mulyojati Village, Metro Barat Subdistrict, Metro City indicate a lack of site-specific data on aquifer characteristics, despite increasing groundwater demand driven by population growth and socio-economic activities. This limitation may lead to uncertainty in well drilling planning and groundwater utilization. Therefore, an effective preliminary exploration method is required to identify groundwater-bearing layers. This study applies the Vertical Electrical Sounding (VES) method using the Schlumberger configuration to investigate subsurface resistivity variations related to lithology and groundwater saturation. The urgency of this research arises from the absence of previous geophysical investigations in the area, particularly within the heterogeneous Qpt Formation, which is considered a potentially productive aquifer. The objective of this study is to characterize subsurface resistivity and delineate potential aquifer zones in Mulyojati Village. The results are expected to provide essential baseline information for groundwater development planning and support sustainable groundwater resource management in the Metro City area.
Co-Authors Acep Ruchimat Anggara Putra Prasetya Anggara Putra Prasetyo Difa Mutafawwiqoh Nadia Putri Nur Asri Rahma Puspa