Identification of the groundwater existence by geoelectrical method

Abstract

Research has been carried out to identify the presence of subsurface water in Selulung Village, Kintamani District, Bangli Regency using 2D geoelectric methods. The work process of this research is the first to collect data directly by using a geoelectric device with Wenner configuration. Electric currents are injected from the surface to the subsurface through the current electrodes which are put on the earth's surface. The collected data is then processed using the Res2Din software version 3.71.118. The software results in the form of 2D images are direct lateral images of subsurface structures. From the three trajectories identified, namely at the coordinates 8°12'18.7"S 115°16'08.3"E the lowest resistivity value was 178 Ohm m with a depth of 10 m which was thought to be a rock layer with surface water content. On line 2 at coordinates 8°12'16.1"S 115°16'09.7"E the resistivity value is 6 ohm.m up to 660,000 ohm.m, the maximum depth obtained is 24 m. This line is thought to be a water-bearing layer because the value of resistance is low. Line 3 which is in the coordinates 8°12'16.3"S 115°15'50.0"E the distribution of resistivity values varies from 42 - 9,400 Ohm m.

Geology and Geophysics of Talumopatu Geothermal Manifestation Area of Mootilango District, Gorontalo Regency, Indonesia

“…The data obtained is in the form of potential difference (∆V) and current (I). subsurface data collection is conducted by injecting electric current into the ground using 4 electrodes, of which 2 electrodes are current injections and 2 electrodes are potential difference measurements where the distance between the electrodes is the same according to the geometric factor formula [7][8][9]. K=2πa (1) Where 𝐾 = geometry factor and a = distance between electrodes Moreover, by substituting the configuration value (K) obtained from equation (1) into equation ( 2), the potential difference (ΔV) and current strength (I) can be used to calculate the apparent resistivity (ρ a ).…”

Analysis of integrated clean water services for west Bali region

“…The river that has the largest capacity is the Yeh Sumbul River with a capacity of 2,716.69 liters/second. Surface water in Buleleng Regency includes water from rivers, with a total of 51 rivers, with a total flow rate of 637 million m 3 every year (Farfán et al, 2019;Sukarasa & Paramarta, 2020).…”

Estimation of the position and potential of aquifers using geo-electrical methods in the framework of drill wells in volcanic areas

“…The transmissivity value obtained was 15.47 (m2/day). This means that drilled wells as a source of water which will later be constructed have very good potential if they are only used for domestic purposes, but are still not good for irrigation purposes (Sukarasa & Paramarta, 2020;Simpen et al, 2018). If we look at the thickness of the existing aquifer, which is greater than 26 m, then this aquifer is a good aquifer.…”