Aquifer Area Investigation Using Resistivity Method in Cikopomayak, West Java, Indonesia

Abstract

Administratively, the research area is located in around Cikopomayak Village, Jasinga, Bogor, West Java, Indonesia. Based on the Hydrogeological and Groundwater Basin Map, this research area was classified to non-potential groundwater basin. In addition, when the summer comes, the lack of water will be happened around the area. Consequently, the water reserve wasn't enough to fulfill the necessity of freshwater. Thus, the research about identifying aquifer location was needed. This research aims to determine the depth and thickness of aquifer for the alternative ways to overcome the problem, particularly, for the Cikopomayak Village. The research used the geophysical method by modeling the several data such as Geoelectric 1-D to know the aquifer location based on the section of medium resistivity value. Then, the geoelectric data was correlated to the borehole drilling data that is Gamma Ray (GR) Log, Spontaneous Potential (SP) Log, Resistivity Log, and the cutting data. Commonly, the most suitable lithology for an aquifer is sandstone because of its good characteristic of permeability and porosity. Logging data result will show the small value of GR log, SP Log leaning to the right, and low-value resistivity for indicating the aquifer zone. Based on geoelectric data, the research zone has 3 groups of resistivity value and lithology that are shaly claystone and siltstone with low-value resistivity (0 -50 Ω.m), sandy claystone, medium sandstone, and coarse sandstone with medium value resistivity (50 -150 Ω.m), fine sandstone, sandy claystone, and andesite with high-value resistivity (> 150Ω.m). The aquifer system in the research area was classified into 3 groups that are aquifer, aquitard, and aquiqlud.

Analysis of S-Wave Propagation and Resistivity Value in Porous Medium for Conjecture Potential of Groundwater in Lempuing Village, Bengkulu City

“…Groundwater conditions in dug wells and drilled wells in housing have an average minimum WQI value in dug well waters of 76.9 and an average maximum WQI value of 92.3 (Prabowo et al, 2021). Sihotang et al (2018) classify the type of aquifer not potential because it is influenced by rock conditions in the region research dominated by claystone and siltstone. The condition of the aquifer has a classification of humidity levels including moderate wetness which indicates good continuity of the geothermal system (Wowor et al, 2021).…”

Determining Groundwater Potential Using Vertical Electrical Sounding Method In Manggar, Balikpapan City, Indonesia.

“…One source of clean water that can be utilized is ground water. Ground water is water present beneath earth's surfaces that fills the rock pores or soil layers (Sihotang et al, 2018;Suryadi et al, 2018).…”